Time-frequency analysis combining wavelets and the envelope technique for fault identification in rotary machines

Nowadays the method based on demodulation by envelope finds wide application in industry as a technique for evaluation of bearings and other components in rotating machinery. In recent years the application of Wavelets for fault diagnosis in machinery has also obtained good development. This article demonstrates the effectiveness of the combined application of Wavelets and envelope technique (also known as HFRT High-Frequency Resonance Technique) to remove background noise from signals collected from defect bearings and identification of the characteristic frequencies of defects. A comparison of the results obtained with the isolated application of only one method against the combined technique is performed showing the increased capacity in detection of faults in rolling bearings. © (2013) Trans Tech Publications, Switzerland.

Simulation-based cutaneous surgical-skill training on a chicken-skin bench model in a medical undergraduate program

Background: Because of ethical and medico-legal aspects involved in the training of cutaneous surgical skills on living patients, human cadavers and living animals, it is necessary the search for alternative and effective forms of training simulation. Aims: To propose and describe an alternative methodology for teaching and learning the principles of cutaneous surgery in a medical undergraduate program by using a chicken-skin bench model. Materials and Methods: One instructor for every four students, teaching materials on cutaneous surgical skills, chicken trunks, wings, or thighs, a rigid platform support, needled threads, needle holders, surgical blades with scalpel handles, rat-tooth tweezers, scissors, and marking pens were necessary for training simulation. Results: A proposal for simulation-based training on incision, suture, biopsy, and on reconstruction techniques using a chicken-skin bench model distributed in several sessions and with increasing levels of difficultywas structured. Both feedback and objective evaluations always directed to individual students were also outlined. Conclusion: The teaching of a methodology for the principles of cutaneous surgery using a chicken-skin bench model versatile, portable, easy to assemble, and inexpensive is an alternative and complementary option to the armamentarium of methods based on other bench models described. © Indian Journal of Dermatology 2013.

Efficacy of four irrigation needles in cleaning the apical third of root canals

This study aimed to evaluate the influence of irrigation needle gauge and design, and the final root canal diameter on the apical cleaning efficacy. Twelve human mandibular incisors were used. At different stages of root canal widening (sizes 20, 30 and 40 K-files), root canals were filled with radiopaque contrast medium. Four different needles were evaluated: 23G with side opening, 22G with apical opening, 30G with side opening and 30G with apical opening. Irrigation was carried out with 2 mL distilled water. The same tooth was radiographed with a digital system several times to assess the four types of needle in those three stages of canal widening. Pre-irrigation (canals filled with contrast) and post-irrigation (canals with remaining contrast) images were submitted to digital subtraction using the Adobe Photoshop CS4 program. Pre-irrigation (filled with contrast) and subtracted (cleaned by irrigation) areas were outlined by a trained and blinded operator using the Image Tool 3.0 software. Their ratio was calculated to express the percentage of apical cleaning in each stage of canal widening (sizes 20, 30 and 40 K-files) with each of the four needles. Data obtained were subjected to one-way ANOVA and Tukey's tests. The 30G needles with side and apical opening promoted better apical cleaning at all stages of root canal widening (p<0.05). In conclusion, smaller diameter needles were more efficacious in cleaning the apical third of the root canals, regardless of their design.

Nodular dermatofibrosis in a gentian shepherd dog: case report

An 7-year-old male German shepherd dog not neutered was attended presenting several cutaneous nodules ranging from 0.5-3 cm in diameter at least a one year history, located mainly in thoracic and pelvic limbs, with progressive weight loss over two months. Fine needle aspiration biopsy and pelvic and thoracic limbs nodules excision biopsy were performed. After histopathological diagnosis, nodular dermatofibrosis diagnosis was determined and abdominal ultrasound was performed for possible renal cysts evaluation. The animal received treatment to control secondary bacterial infection. It is necessary to carry out histopathological examination and ultraosund to identify possible renal cysts and for definitive diagnosis. There is no specific treatment for nodular dermatofibrosis. © 2013 Asian Network for Scientific Information.

Facial hemangiossarcoma in a blue-fronted amazon parrot (Amazona aestiva)

Here we describe the first case report of an hemangiosarcoma in a male Blue-fronted amazon parrot (Amazona aestiva). The mass was localized near the inferior portion of the right orbit. A fine needle aspiration biopsy (FNAB) was performed and a presuntive diagnosis of hemangioma/hemangiosarcoma was established. Further histopathological evaluation revealed a mesenchymal neoplasm composed basically by well formed vascular channels lined by pleomorphic endothelial cells. Thus, the final diagnosis was a well-differentiated cutaneous hemangiosarcoma.

Clinical, cytologic, and histologic features of a mammary micropapillary carcinoma in a dog

Mammary invasive micropapillary carcinoma is a rare variant of mammary carcinoma that was recently recognized in dogs. The cytologic features and biologic behavior of such neoplasms in dogs have not yet been widely discussed in the veterinary literature. We report the clinical, cytologic, and histologic features of a canine micropapillary carcinoma in a 13-year-old female mongrel dog. The mammary region presented with extreme local pain, severe edema and erythema, and multifocal epidermal ulceration, which is typical for an inflammatory mammary carcinoma. Fine-needle aspirates were highly cellular and consisted of individual cells and papillary cell clusters with characteristics of malignant epithelial cells. Histologic examination revealed neoplastic cells arranged in small papillae without fibrovascular cores, sometimes inside clear lymphatic spaces, indicating lymphovascular invasion. Regional lymph node evaluation revealed metastatic cells. Due to deteriorating clinical condition the dog was euthanatized 5 months after mastectomy. At necropsy, metastatic neoplastic mammary cells were found in popliteal and mediastinal lymph nodes, the right femoral biceps muscle, liver, heart, lungs, and urinary bladder. © 2013 American Society for Veterinary Clinical Pathology.

Características principais de pacientes com PSA menor ou igual a 4,0 ng/ml, submetidos à biópsia de próstata guiada pelo ultrassom transretal

Pós-graduação em Bases Gerais da Cirurgia - FMB

Efeito da inflamação do tornozelo sobre as características histológicas, a expressão gênica e níveis da creatina cinase nos músculos sóleo e tibial anterior de ratos diabéticos

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estudo experimental do escoamento em torno de cilindros circulares em movimento de rotação

Pós-graduação em Engenharia Mecânica - FEIS

Diagnóstico comparativo entre a histopatologia e citologia por capilaridade com agulha de insulina nas neoplasias mamárias caninas

Pós-graduação em Cirurgia Veterinária - FCAV

Avaliação estrutural da próstata de cães: comparação entre punção aspirativa com agulha fina guiada por ultra-som e biópsia por videolaparoscopia

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Biópsia hepática guiada por videolaparoscopia em caprinos

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação da capacidade atlética de cavalos da raça árabe submetidos a exercícios aeróbicos em esteira ergométrica

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Intoxicação experimental de cães com sementes de Crotalaria spectabilis (Leg. Papilionoideae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação da técnica de biopsia pulmonar transtoracica em ovinos clinicamente sadios e os efeitos do procedimento sobre o metabolismo oxidativo

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)