Judul: The Influence of BTS as a Brand Ambassador on Brand Image and Purchase Intention of Comsumers Tokopedia in Indonesia
Abstrak: Mewabahnya virus corona menyebabkan terjadinya perubahan yang cukup signifikan, salah satunya kegiatan belanja. Mengawali tahun 2021, Tokopedia menggandeng boysgroup Korea, Bangtan Sonyeondan (BTS) sebagai brand ambassadornya. Tokopedia merupakan perusahaan e-commerce yang terus melakukan pengembangan strategi marketing untuk mendongkrak loyalitas dan minat beli konsumennya. Tujuan dilakukan penelitian ini ialah untuk mengidentifikasi karakteristik konsumen pengguna platform Tokopedia, menganalisis pengaruh brand ambassador terhadap brand image, menganalisis pengaruh brand ambassador terhadap minat beli konsumen, serta menganalisis pengaruh brand image terhadap minat beli konsumen. Metode analisis data yang digunakan adalah analisis deskriptif dan analisis SEM-PLS. Hasil penelitian menunjukkan bahwa terdapat pengaruh antara variabel brand ambassador terhadap brand image serta variabel brand image terhadap minat beli konsumen, sedangkan antara variabel brand ambassador terhadap minat beli konsumen tidak memiliki pengaruh., The outbreak of the corona virus has caused significant changes, one of which is shopping activities. Starting 2021, Tokopedia collaborates with the Korean boy group, BTS as its brand ambassador. Tokopedia is an e-commerce company that continues to develop marketing strategies to boost consumer loyalty and buying interest. The purpose of this research is to identify consumer characteristics of users of the Tokopedia platform, analyze the influence of brand ambassadors on brand image, analyze the influence of brand ambassadors on consumer purchase intention, and analyze the influence of brand image on consumer purchase intention. The data analysis method used is descriptive analysis and SEM-PLS analysis. The results showed that there was an influence between brand ambassador variables on brand image and brand image variables on consumer purchase intention, while between brand ambassador variables on consumer purchase intention had no effect.
Keyword: Brand ambassador, Brand image, BTS, Purchase intention, Tokopedia

Judul: Analisis Persepsi Konsumen terhadap Keputusan Pembelian Online di Tokopedia.
Abstrak: Pengguna internet di Indonesia semakin meningkat. Hal itu berpengaruh positif terhadap transaksi jual beli online. Pada saat ini persaingan e-commerce semakin ketat di Indonesia. Tokopedia harus meningkatkan keunggulan dalam bersaing dengan e-commerce lainnya untuk menarik banyak konsumen dengan memahami persepsi konsumen dalam pengambilan keputusan pembelian. Tujuan dari penelitian ini adalah mengidentifikasi karakteristik konsumen Tokopedia dan menganalisis pengaruh harga, kualitas layanan, dan merek terhadap keputusan pembelian online Tokopedia. Metode pemilihan sampel menggunakan metode non-probability sampling dengan teknik purposive sampling. Metode analisis yang digunakan adalah analisis regresi linier berganda. Hasil uji F menunjukkan bahwa pengaruh harga, kualitas layanan dan citra merek berpengaruh signifikan terhadap keputusan pembelian online tokopedia (sig. 0.000). Hasil uji t bahwa harga (sig. 0.044), kualitas layanan (sig. 0.040), dan citra merek (sig. 0.000) memiliki pengaruh signifikan terhadap keputusan pembelian online Tokopedia.
Keyword: keputusan pembelian, regresi linier berganda, Tokopedia

Judul: Synthesis of Apatite - Chitosan Composite Using Duck Eggshell and Chitosan with Temperature and pH Control
Abstrak: Composite of apatite-chitosan was prepared by using chitosan as polymer matrix. Calcium phosphate was prepared from CaO and (NH4)2HPO4, which the ratio Ca : P had to be 1.67. Chitosan is produced by deacetilase from biopolymer chitin. Duck eggshell (95% CaCO3) as starting material was converted to be calcium oxide (CaO) through calcinations with temperature 1000oC for 5 hours. In-situ and ex-situ methods were prepared from apatite and chitosan (dissolved with acetate acid 2%). Calcium phosphate prepared for bone implantation, but it is too fragile and brittle to be implant into the body. So addition of chitosan can decrease crystalinity and increase mechanic characteristic (tougher). Composite apatite-chitosan was resulted by fast precipitation. Fast precipitation was held in a breaker glass with nitrogen atmosphere, under controlled temperature at 37oC and pH 7, in order to increase amount of hydroxyapatite. Precipitation with CaO which was dropped by (NH4)2HPO4. Hydroxyapatite and chitosan were appearing at samples with in-situ and ex-situ methods which indicating by peak matching of XRD (closed lattice parameter, crystal size), overlapping at FTIR spectra and supporting by SEM picture (homogenous and agglomerated particle). However, it still needs further research to examine biocompatibility osteoconductive degree of sample by in-vivo and in-vitro test.
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