Apatite-type lanthanum silicates show a great potential to be used as an electrolyte for intermediate-to low-temperature (600-700 C) solid oxide fuel cells (ITSOFC). However, so far these materials need to be prepared using a very high-temperature method, thus there is a growing interest to prepare apatites at lower temperatures. This paper reports the synthesis of undoped La 9.33 Si 6 O 26 and doped apatites (La 9 CaSi 6 O 26,5 , La 9 SrSi 6 O 26,5 , and La 9 BaSi 6 O 26,5 ) from raw materials La 2 O 3 , Na 2 SiO 4 , BaCO 3 , CaCO 3 , and SrCO 3 using a hydrothermal method. The polycrystalline apatites were obtained as a white powder, after the basic solution of the reagent mixture was heated at 240 C in an autoclave for 3 days. Le Bail refinement of the X-ray powder diffraction data showed that the compounds have a hexagonal cell (P 6 3 /m space group). In this paper, the undoped La 9.33 Si 6 O 26 and La-doped apatite ionic conductivities are also presented.

Word of mouth (WOM) become an important part in marketing studies considering that communication in Word of mouth (WOM) is able to influence the consumer. Word of mouth (WOM) is capable of spreading rapidly when the individual who is spreading it also has a wide network. This study aims to (1) to find out and analyze the positive and significant effect of Word of Mouth (WOM) on purchasing decision of region-exclusive fabric of West Nusa Tenggara Province (case study on Sasambo fabric in Bima City), (2) to give an input of thought to sasambo fabric manufacturer in Bima Town to implement the marketing strategy that does not rely on high cost but what is required is loyal consumer, so that the quality of sasambo fabric is must be upgraded and has more variety in motif. The research is conducted in Bima town for 2 months from Mei to June 2018. The population of this research is all of the people in Bima who bought and used Sasambo cloth with a number of samples are 96 people and technique of sampling is purposive sampling. The technique of Data analysis used is a simple linear regression analysis by using the equation, i.e: Y = a +bx. The result variable statistic test of WOM achievement point in the amount of 17.541 with table point in the amount of 1,985 (17.541 ˃1,985), then, so Word of Mouth (WOM) has a positive and significant effect on purchasing decision of region-exclusive fabric of West Nusa Tenggara province (Case Study on Sasambo Fabric in Bima City).

BIMEVOX had the potential to play an important role in solid oxide fuel cell, especially as the electrolyte due to their high ionic conductivity. In this work, oxide ion migrations of γ-Bi2VO5.5 and BIMEVOX were simulated using density function theory (DFT), Mott-Littleton method, and molecular dynamic simulation. In γ-Bi2VO5.5, there were oxygen vacancies at the equatorial position in the vanadate layers. These vacancies could facilitate oxide ions migration. The Enthalpy of the oxide migration for γ-Bi2VO5.5 based on DFT calculation was 0.38 eV, which was in a good agreement with experimental results. The γ-Bi2VO5.5 can be stabilized by partial substitution of V5+ with Cu2+, Ga3+, and Ta5+. Defect simulation results using the Mott-Littleton method showed that the total maximum energies of region II were achieved at concentrations of 10, 10, and 20%, respectively for Cu2+, Ga3+, and Ta5+. The calculated concentration of Cu2+, Ga3+, and Ta5+ were in a good agreement with those of experiment results, where the highest ionic conductivity obtained. The results of the molecular dynamics simulation showed that the activation energies of oxide ion migration in γ-Bi2VO5.5 and BIMEVOX (ME = Cu and Ta) respectively were 0.19, 0.21, and 0.10 eV, close to experimental values.

This study aims to determine the effect of social media on online buying interest (case studies on senior students) with 50 respondents. The indicators of social media (x) consist of 2 namely trust and convenience while the indicators of buying interest (y) consist of 4 namely transactional interest, refrential interest, preferential interest and explorative interest. The definition of this study uses 2 variables: the independent variable is social media (x) and the dependent variable is online buying interest (y). The research method is an associative research using a qualitative approach consisting of questionnaire data. Data analysis techniques used in this study are validity, reliability, simple linear regression, simple correlation coefficient, correlation, coefficient of determination and using the statistical t test. The results showed that the influence of social media significantly influenced online buying interest.

This research was conducted because of researchers' concerns about the authenticity of Jepin Tali Bintang Dance property in Kalimas Village, which in the future does not rule out change. Therefore, this study aims to determine the shape and meaning that needs to be revealed in terms of the unique in Jepin Tali Bintang dance property. The method that is utilized is descriptive method with qualitative research and also semiotic approach. The collection technique in the form of observation, interview, and documentary study. Data validation technique that is used by conducting the extended observation and triangulation source. Based on the data analysis can be concluded that the meaning of Jepin Tali Bintang Dance property has a message that wanted to be delivered to the society in Kalimas Village especially to the muslims. Jepin Tali Bintang Dance property with pentagon shape where has which is means the five Pillars of Islam. The yellow painting property symbolize Pontianak Kadariah Palace. The property hanging above the dancer depicts the stars in the sky, the 8 of ropes that is used mean sense of kinship that connecting to each other. The various colors on the rope consists of 4 colors, namely white, red, yellow and green, each color has a different meaning. The meaning of all Jepin Tali Bintang properties are interconnected with each other and has related with the daily life of the people in Kalimas Village, especially for Muslims.