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Total hip replacement is a successful procedure in orthopedic surgery for the long term. However, implants from biocompatible aspects of materials remain an emerging problem. Implants from metal materials generally produce predictable and successful processes, while ceramic materials can cause several problems. One of the fractures, total hip replacement implants is low tensile strength and wearability. Many studies have concluded that the manufacturing process is difficult and can affect production costs. In addition, the heterogeneity of the material caused not optimized mechanical properties. The purpose of this paper is to find out the characteristic of Dental Stone Grade IV material see from a mechanical aspect. The measurement used in the experimental method included tensile, hardness, and wear tests. The results of the tensile test are 10,69 MPa, the average value of hardness is 1092.20 HVN, and the wear rate of Dental Stone Grade IV Material is 1,17 × 10-7 mm³/mm. [ABSTRACT FROM AUTHOR]

The constituent of Cananga oil is caryophyllene, linalool, and germacrene D, and the main constituent of patchouli oil is the sesquiterpene patchoulol, all have a repellent effect. Moreover, the patchouli oil has a fixative property. The combination of cananga and patchouli oil expected to give a more durable repellent effect. This study conducted to investigate the characteristics and the effectiveness of repellent lotion that contained cananga and patchouli oil. Made lotions that contained cananga oil 7.5% combined with patchouli oil 1%, 2%, and 3%. The characteristic test consists of organoleptic, homogeneity, emulsion type, viscosity, pH, and stability with the freeze-thaw cycle method. The activity test as a repellent using Aedes aegypti mosquitoes for 150 minutes, each period for 30minutes with 3minute exposure. The repellent lotion all the formula has the same characteristic, they are homogeneous, soft, aromatic textured liquid, an oil-in-water type emulsion, and easily dispersed, they have a good pH and viscosity, remain stable after the freeze-thaw cycle testing. While the result repellent test showed the protective power all formula is not different (Twoway ANOVA; a=0.05), they are effective as a repellent for 60 minutes. [ABSTRACT FROM AUTHOR]

The origin, development and characteristics of microgrid technology are summarized in this paper. This paper mainly introduces the protection technology and control technology in the microgrid technology. The protection technology of microgrid is very different from the traditional large power grid protection technology. As for as microgrid protection, the follows need to be taken into account: (1) the direction of the power flow in the microgrid is bidirectional; (2) the magnitude of short-circuit current is quite different in the two cases of grid connected operation and island operation. The control technology of microgrid includes master and slave control and peer control. In addition, the abuse of the large power grid is becoming more and more obvious. This paper introduces the related research of DC micro grid. Finally, the development direction of microgrid technology is prospected. [ABSTRACT FROM AUTHOR]

In this work we report preparation and investigation of structural and optical properties of polyaniline conducting polymer. By using sol-gel in spin coating technique to synthesize thin films of conducting polymer polyaniline (PANI). Conducting polymer polyaniline was synthesized by the chemical oxidative polymerization of aniline monomers. The thin films were characterized by technique: Hall effect, High Resolution X-ray diffraction (HR-XRD), Fourier transform infrared (FTIR) spectroscopy, Field emission scanning electron microscopy (FE-SEM), and UV-vis spectroscopy. Polyaniline conductive polymer exhibit amorphous nature as confirmed by HR-XRD. The presence of characteristic bonds of polyaniline was observed from FTIR spectroscopy technique. Electrical and optical properties revealed that (p-type) conductivity PANI with room temperature, the conductivity was 6.289x10-5 (O.cm)-1, with tow of absorption peak at 426,805 nm has been attributed due to quantized size of polyaniline conducting polymer. [ABSTRACT FROM AUTHOR]