Performance evaluation of piezoelectric sensor/actuator on active vibration control of a smart beam

In this paper the performance of a piezoelectric sensor/actuator pair and self-sensing piezoelectric actuator on the investigation of vibration characteristics and active vibration control of a smart beam are presented. The performance of piezoelectric patches on actuation and sensing is evaluated by investigating the vibration characteristics of the smart beam via various excitation mechanisms and transduction systems. For active vibration suppression of the smart beam, robust controllers are designed and experimentally implemented by using a piezoelectric sensor/actuator pair and self-sensing piezoelectric actuator. Finally, experimental results for active control of free and the first-resonance forced vibration of the smart beam are presented

GIANT CERVICAL POLYP DUE TO A FOREIGN-BODY IN A VIRGIN

WOS: A1988P287500018PubMed ID: 3228410

Giant Cervical Polyp Due to a Foreign Body in a ‘Virgin’

PubMedID: 3228410Summary: A 17-year-old virgin who had a giant cervical polyp which had developed through a foreign body and protruded out of the hymen was evaluated; the aetiological significance of the foreign body in the formation of the cervical polyp is discussed. Copyright © 1988, Wiley Blackwell. All rights reserve

Scanning laser ophthalmoscopy for early diagnosis of vitreoretinal interfase syndrome

PubMedID: 11989570Purpose: To describe the angiographic signs found using scanning laser ophthalmoscopy for the early diagnosis of vitreoretinal interface syndrome. This method is useful to visualize the inner retinal layers, being more sensitive than fundus biomicroscopy. Material: 61 patients with vitreoretinal interfase syndrome were evaluated. All of them had evidence of this disease using scanning laser ophthalmoscopy but four patients were referred without diagnosis of vitreoretinal interfase syndrome. These patients showed no biomicroscopic signs and diagnosis was made with SLO. Methods: Confocal scanning infrared laser ophthalmoscope (Heidelberg Retinal Angiograph assembled by Heidelberg Engineering). This SLO uses an infrared diode laser source of 795 nm. Conclusion: Patients included were referred with another diagnosis and with this method the correct diagnosis was made. In conclusion scanning laser ophthalmoscopy allows early diagnosis of this pathology for follow-up and treatment

Dermatomycosis in renal transplant recipients in Adana, Turkey

PubMedID: 18937667[No abstract available

Immediate and long-term high levels of plasma homocysteine after extracorporeal shock wave lithotripsy in patients with renal stone disease

PubMedID: 24865596Background: Plasma homocysteine levels increase in patients with chronic renal failure. Numerous studies have demonstrated that kidney function is one of the most important determinants of plasma total homocysteine (tHcy) concentration. In this study we aimed to evaluate the relationship between tHcy levels and extracorporeal shock wave lithotripsy (ESWL) for patients with renal stones and to see if the change in homocysteine levels continued if renal dysfunction improved. Materials and methods: The study consisted of 20 patients who underwent first-time ESWL for renal stones. Every patient gave 3 blood samples at 24 h before surgery and at 2 days and at 3 months after ESWL for measurement of plasma levels of tHcy, creatinine, vitamin B6, and vitamin B12. Results: The 20 patients (12 male, 8 female) had a mean age of 42.8 ± 11.7 years. tHcy levels showed a statistically significant increase from 9.4 ± 1.4 to 18 ± 4.8 and 11.2 ± 2.1 at 2 days and at 3 months, respectively. Serum creatinine also showed a statistically significant increase compared to baseline at 2 days and at 3 months after ESWL. Conclusion: After first-time ESWL, the increase in serum levels of creatinine and tHcy due to renal injury, such as ischemia/reperfusion injury, may be severe and continue for a long period, such as 3 months. According to baseline levels, the increase in homocysteine levels as an indicator of oxidant stress was more severe than the creatinine levels after ESWL for renal stones. Our patients were first-time ESWL patients; however, in patients who undergo EWSL more than once long-term high tHcy levels should also be considered as renal. © 2014 Japanese Society of Nephrology