Judul: Kajian dalam Penerimaan Penggunaan E-Commerce dengan Metode Technology Acceptance Model (TAM) Studi Kasus Perusahaan Maskapai Penerbangan di Indonesia
Abstrak: This paper is aimed to study and increase our current understanding on the acceptance model of e-commerce by using technology acceptance models. The variable are efficiency, ease of use, enjoyment, amount of information. These variables are significantly affecting perceived of use e-commerece. The instrument in conducting this research questionnaire. Questionnaire distributed by email and in the Jakarta. Only respondents responded the questionnaire with using e-commerce will be analyzed. Using Partial least square found significantly relation between variables. There are to analyzed, which are inner and outer in order to find out the relation in and out. The result are relation between amount of information and preceived using e-commerce is weak; Enjoyment contributed in perceived of use in high contribution. And the strong correlation efficiency and ease of use. This finding refers to the fact that the company will increase the e-commerce system that more user friendly and secure in order to deliver the customer needs. Increasing accebility in using e-commerce more easy and enjoyable with quality of internet connection.
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Judul: The Effect of Ease of Use and Usefulness Towards Intention to Use with Attitude As A Mediator on Online Food Delivery Platform
Abstrak: Platform online food delivery adalah salah satu marketplace yang banyak diminati di Indonesia. Hal ini disebabkan perilaku belanja baru pada konsumen yaitu belanja online. Sejak lima tahun silam transaksi e-commerce di Indonesia selalu meningkat. Namun, pada website mediakonsumen.com dan review google play store keluhan-keluhan konsumen mengenai penggunaan terhadap platform online food delivery masih sering ditemukan. Tujuan dari penelitian ini adalah menganalisis pengaruh perceived usefulness dan perceived ease of use terhadap intention to use dengan sikap konsumen sebagai variabel mediator pada platform online food delivery. Analisis deskriptif digunakan untuk mengetahui karakteristik konsumen. Untuk mengetahui pengaruh-pengaruhnya, peneliti menggunakan analisis metode structural equation modeling partial least square (SEM-PLS). Dari hasil analisis tersebut dapat diketahui bahwa perceived usefulness dan perceived ease of use dapat meningkatkan attitude toward using atau sikap konsumen dan attitude toward using dapat meningkatkan intention to use pada platform online food delivery. Selain itu, perceived ease of use dan perceived usefulness juga dapat meningkatkan intention to use atau niat menggunakan kembali jika melalui variabel mediator sikap konsumen. Oleh karena itu, variabel ini menjadi variabel mediasi full-mediation yang sangat berperan untuk memengaruhi niat konsumen dalam penelitian ini., The online food delivery platform is one of the most popular marketplaces in Indonesia. The reason behind it is because of the new shopping behavior, namely online shopping. Since five years ago, e-commerce transactions in Indonesia has always increased. However, on the mediakonsumen.com website and Google Play Store reviews, consumer complaints against the using of online food delivery platform are still often found. The aim of this study is to analyze the effect of perceived usefulness and perceived ease of use on the intention to use consumer attitudes as a mediator variable on the online food delivery platform. Descriptive analysis was used to determine the characteristics of consumers. To find out the influencing effects, the researcher used the structural equation modeling method of partial least squares (SEM-PLS) analysis. From the results, it can be found that perceived usefulness and perceived ease of use can increase attitude toward using ii and attitude toward using can increase intention to use of onlone food delivery platform. Besides that, perceived usefulness and perceived ease of use can also increases intention to use if there is attitude toward using as a mediator variable. Therefore, in this study, attitude toward using variable becomes a full-mediation mediation variable that plays a very important role in influencing consumer intentions.
Keyword: Attitude Toward Using, Online food delivery platform, Structural Equation Modeling-Partial Least Square, Technology Acceptance Model

Judul: Hydrothermal Synthesis of Biphasic Calcium Posphate
Abstrak: Biphasio calsium phosphate (BCP), which was a mixture of hydroxypatite (HA) and tricalcium phosphate (TCP), was synthesized by hydrothermal method followed by sintering process. Hydroxyapatite was produced by using natural calcium source CaO from hen's eggshell and (NH4)2HPO4 as phosphate souce, other hydroxyapatite sample was produce by using synthetic calcium source Ca(OH) and H3PO4 as phosphate source.
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