Effect of Electric Field of deferent frequencies; on RBCs After being Irradiated by (690μW) of He-Ne Laser

This study focuses on studying the effects of Electric Field of deferent frequencies (20Hz – 3MHz), on RBCs after being irradiated by (690μW) of He- Ne Laser, with testing some blood characteristics like osmotic fragility, Conductivity and Dielectric constant.

Pulpotomy in the Primary Teeth: Comparison of Four Techniques

The purpose of this study was to evaluate the success of Formocresol pulpotomy compared with Ferric sulfate and Electro coagulation and Laser pulpotomy in primary teeth. Fourty seven primary second molars of children aged 5-8 years, were divided randomly into four groups: 10 Formocresol , 13 Ferric sulfate , 13 Electro coagulation, 10 Laser. All teeth were filled with ZOE and sealed with Compomer, and S.S.Crown as final restoration. The success rate was 90 % - 84.6 % - 84.6 % - 83.3 % respectively. These differences were not statistically significant p=0.05), but there were a relation between the pretreatment physiologic resorption of roots and the type of hemorrhage during the amputation procedure. This study revealed that Ferric sulfate, and Electro coagulation, and Laser pulpotomy are good alternative to Formocresol pulpotomy.

Efficiency of Laser Assisted Flapless Corticotomy on The Upper Canine Retraction

The aim of this study is to compare between the upper canine retraction after corticotomy with laser and the upper canine retraction using the standard treatment, and the patients' acceptance to laser application. Analysis of the rate of canine retraction between the laser application and control sides shows significant differences during the first and second months and no significant differences during the third month. We also find that the patients' percentage that accept laser application was bigger than the patients' percentage that accept the extraction of first premolars.

Increasing the efficiency of the photovoltaic cell by Grooving its surface using laser

We grooved photovoltaic cell surface, to extend front grid electrical contact, using laser to improve its performance. By reduce line width leads to reduced shading loss. Mor light can penetrate into the cell instead of being reflected from the metallic gridlines.

A Comparative Laboratory Study to Evaluate The Marginal Microleakage in The cavities Prepared by The Laser and The Classic Method which Restored by Using Two Types of Resin Materials

This study aimed to evaluate the extent of the microleakage in the cavities which prepared with Er:YAG (erbium: yttrium aluminum garnet) laser or diamond burs and restored by using of different types of resin materials.

Defining the plasma parameters of solid red Copper depending on (LIPS) technique and by using Nd:YAG laser

This paper discuss the Laser induced breakdown spectroscopy (LIBS) by using Nd:YAG which is a high energy pulsed Laser . The laser radiation is focused on solid targets which are samples of red Copper (99.5%). Most important Plasma parameters which are electron temperature and density was measured.

comparison of lithotripsy results for lower third ureteric stones by Extacorporeal shock-wave lithotripsy(ESWL) versus ureteroscopyic-laser lithotripsy

The main objective of the study is to select the best technique for lithotripsy of distal ureteral stones .This study included 082 patients of distal ureteral stone at Al-Assad University Hospital and Tishreen University Hospital in Latakia between 2016 and 2017. 64 patients who underwent ureteroscopic holmium laser lithotripsy and 216 patient who underwent ESWL.The ages ranged from 19-72Years, The median age was approximately 37 year. the success rate of distal ureteral lithotripsy using uretroscope-laser was 97% (100% with stones> 1 cm, and 95% with stones< 1 cm) while it was 72% with the extracorporeal lithotripsy(84% with stones > 1 cm, and 36% with stones < 1 cm). The best results in treating the distal uretral stones were achieved by the use of ureteroscope and laser lithotripsy, regardless of the stone size. While the extracorporeal lithotripsy the best results was only with stones< 1 cm.

Design and Implementation of a Semi-Reflective Plate Operating in The Visible and Near Infrared Fields, With Reflection Coefficient Robust to The Light Wavelength and Angle of Incidence

This research illustrates the design of a parallel plate reflector operating in the visible and near infrared fields, with a reflection and/or transmission coefficients equal to 50%, and robust to the polarization of the used light and its extinction ratio (PER), in each of the two directions of polarization (perpendicular S and parallel P). Also there is no need for accurate adjustment of the plate so that the angle of incidence is exactly equal to 45. The research has its various applications in optical measurements laboratories, laser technology laboratories, optical communication laboratories, and photography. One of the most important applications of this plate is ophthalmology devices, which can be used as glasses for people with impaired vision, light measurements in laser laboratories and optical measurements.

Study of the Damage Threshold of optical surfaces of high-power energy pulse lasers with changing coefficient of optical surface roughness

ABSTRACT This paper presents the measurement of the laser Threshold damage of an optical surface at different roughness coefficients. The study procedure is achieved through the manufacturing of two types of parallel-sided borosilicate plate (Glass Bk7, and SF13). The Laser used is ND: YAG pulsed laser and the longitudinal mode TEM00 laser pulses with pulse width τ =30ns and wave length λ=1.064μm, the laser beam is focused using F=30 mm lens. The concentrated laser beam is guided by a converging lens towards the optical surface of the parallel surface plate. Finally, we obtained a graph of roughness coefficient is drawn in relation the optical Threshold Damage of the optical surface, Before and after processing the optical surface. We were able to raise the threshold by about 15% after conducting thermal treatment of the optical surface.

Optical and Reflective Characteristics Measurement and Focal Length Calculation of a Hollow Tetrahedral Corner and a Solid Highly Retroreflective Cubes

Corner cubes are one of the most important optical tools used in new optical devices and optical LIDAR. This paper compares two different designs of the hollow and solid tetrahedral corner cubes and determines the relation between the Retroreflection index and the surface quality N and the surface flatness N and its effect on the focal length of the hollow and solid corner cube.