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: The Effect of E-Service Quality on GrabFood's Customers' Satisfaction and Loyalty
Abstrak: Online food delivery merupakan salah satu bentuk implementasi teknologi yang telah melekat pada aktivitas sehari-hari masyarakat. Di Indonesia, salah satu layanan online food delivery yang sudah tersedia adalah GrabFood. Namun, dengan persaingan yang kompetitif, GrabFood harus bisa terus menjaga dan meningkatkan e-service quality yang dimiliki agar dapat menjaga kepuasan dan loyalitas konsumennya. Penelitian ini dilakukan terhadap responden sebanyak 139 orang yang dipilih dengan menggunakan teknik non-probabilty sampling yaitu purposive sampling. Teknik yang digunakan dalam analisis data adalah SEM-PLS untuk melihat hubungan antar variabel dan analisis deskriptif untuk menjelaskan karakteristik responden. Dari hasil penelitian ditemukan bahwa e-service quality berpengaruh secara positif dan signifikan terhadap kepuasan dan loyalitas pelanggan. Selain itu, kepuasan pelanggan berpengaruh secara positif dan signifikan terhadap loyalitas pelanggan. Serta, kepuasan pelanggan dapat memediasi pengaruh e-service quality terhadap loyalitas pelanggan dengan bentuk mediasi yaitu mediasi parsial. GrabFood perlu terus untuk memperhatikan dan memelihara e-service quality yang dimiliki, terutama pada dimensi efisiensi, agar dapat mempertahankan dan meningkatkan kepuasan dan loyalitas pelanggannya., Online food delivery is a form of technology application that is implanted in people's daily activities. In Indonesia, one of the available online food delivery services is GrabFood. However, with fierce competition, GrabFood must be able to continue to maintain and improve the quality of its e-services in order to maintain customer satisfaction and loyalty. This research was conducted on 139 respondents who were selected using a non-probability sampling technique, specifically purposive sampling. The technique used in data analysis is SEM-PLS to see the relationship between variables and descriptive to explain the characteristics of the respondents. From the results of the study it was found that e-service quality has a positive and significant effect on customer satisfaction and loyalty. In addition, customer satisfaction has a positive and significant effect on customer loyalty. Also, customer satisfaction can mediate the effect of e-service quality on customer loyalty in a form of mediation, namely partial mediation. GrabFood needs to continue to pay attention to and maintain it’s e-service quality, especially in the efficiency aspect, in order to maintain and increase it’s customer’s satisfaction and loyalty.
Keyword: customer loyalty, customer satisfaction, e-service quality, grabfood

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.
Keyword: