Judul: Analisis dan Implementasi Two Factor Authentication dengan QR Code pada Aplikasi Berbasis Web
Abstrak: The process of authentication on the web application in the Internet is very important and call for a method that can securely authenticate. Two Factor Authentication is a method of combining two or more methods of authentication to improve security. In this research, analysis and implementation of two-factor authentication with QR code on a web-based online application is implemented. The system will use an authentication token application that run on mobile phones. Token application will work as a scanner that reads the information from the QR code on the web application. The use of QR code in the system is expected to enhance the security and simplicity of the authentication process
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Judul: Determinan Minat dan Perilaku Penggunaan QRIS sebagai Metode Pembayaran Digital dengan Model Extended UTAUT
Abstrak: Bank Indonesia menerbitkan Quick Response Indonesian Standard (QRIS) guna mendukung transaksi yang lebih aman, mudah, cepat, dan efisien. Penelitian ini bertujuan untuk menganalisis preferensi dan faktor-faktor yang dapat mempengaruhi niat dan perilaku penggunaan QRIS dari perspektif konsumen di Jabodetabek menggunakan model extended Unified Theory of Acceptance and Use of Technology (UTAUT). Penelitian ini dilakukan pada bulan Maret 2023 sampai Mei 2023. Penelitian ini meneliti sejumlah 198 responden di Jabodetabek yang merupakan pengguna e-wallet atau m-banking dan mengetahui fitur QRIS. Kuesioner disebarkan secara online dan hasilnya diolah dengan menggunakan Structural Equation Modelling (SEM). Hasil penelitian ini menunjukkan bahwa persepsi risiko, ekspektasi kinerja, pengaruh sosial, dan ekspektasi usaha berpengaruh positif signifikan terhadap niat perilaku menggunakan QRIS. Sedangkan perilaku penggunaan QRIS dipengaruhi secara positif signifikan oleh niat perilaku dan kondisi yang memfasilitasi. Strategi prioritas yang dapat diterapkan untuk meningkatkan adopsi teknologi QRIS adalah dengan mengedukasi peran QRIS dalam mengurangi risiko-risiko pembayaran., Bank Indonesia issued a Quick Response Indonesian Standard (QRIS) to support transactions that were safer, easier, faster and more efficient. This study aimed to analyze the consumer preferences and factors that influence their intention and use behavior when using QRIS in the Jabodetabek area. The Extended Unified Theory of Acceptance and Use of Technology (UTAUT) model was employed to analyze these aspects. This research was conducted from March 2023 until May 2023. Online questionnaires were distributed to 198 respondents who were users of e-wallets or mobile banking and knew about the QRIS feature. Then, the collected data were analyzed using Structural Equation Modelling (SEM). The findings revealed that perceived risk, performance expectancy, social influence, and effort expectancy had a significant positive effect on the behavioral intention to use QRIS. Meanwhile, QRIS usage behavior was positively influenced by both behavioral intentions and facilitating conditions. One of the top priority strategies to increase the adoption of QRIS is educating the public about how QRIS can lower payment risks.
Keyword: adopsi fintech, extended UTAUT, pembayaran QR code, QRIS, extended UTAUT, fintech adoption, QR code payment, QRIS

Judul: Mercury Toxicity and It’s Effect on Histopathology Change of Nile Tilapia (Oreochromis niloticus).
Abstrak: Nile tilapia (Oreochromis niloticus) is one of fish species that oportunity to contaminated with mercury. The effects of pollutants can damage living organisms organs and can cause death. The effects caused mercury had acute or chronic character. The aims of this study are to determine threshold and acute toxicity of mercury chloride (HgCl2) of Nile tilapia (Oreochromis niloticus), to assess the effect of mercury chloride (HgCl2) on several biometric parameters (survival, growth rate of average daily weighted, liver condition, bile and reproductive variability of Nile tilapia (Oreochromis niloticus), assess the level of damage to the histological structure of the gills, liver and kidney of Nile tilapia (Oreochromis niloticus) caused mercury chloride (HgCl2) exposure. This study was conducted from February to June 2013. Nile Tilapia (Oreochromis niloticus) were used in this study were female with average weight 20 grams or 11-13 cm length range. Toxicant materials used in this study was mercury chloride (HgCl2). Fish were reared in each aquarium 60x40x30 containing 48 liters of water. This study consists of three stages: a preliminary test, acute test, and sub-chronic test. To determine the changes in biometric condition of tilapia approximated by measuring the survival rate (SR), the growth rate of average daily weight , the content of mercury in the fish organs, hepatosomatic index (HSI), the relative bile volume (VER), gonadal soamtic index (IKG), fecundity and oocit diameter, tissue damage caused by mercury in fish organs by making histological preparations stained with hematoxylin and eosin. The median lethal concentration (96 hr, LC50) of Mercury Chloride was calculated as 1,64 mgL--1.The survival rate was highest in the control treatment (46,67 %) . Mercury chloride with concentration 0.196 mgL--1 show significant effect to changes HSI and relative bile volume, and oocyte diameter of Nile tilapia (p < 0,05). Mercury chloride with a concentration of 0,164 mgL-1 and 0,196 mgL-1 have not a significant effect on the growth rate of weight, gonadal somatic index and fecundity of Nile tilapia (p > 0,05). Mercury chloride cause damage to gills (hyperplasia, hypertrophy, proliferation and neukrosis), liver (hyperplasia, hemorhage, shrinkage of hepatocytes, proliferation and neukrosis) and kidney (hyperplasia, hemorrhage, shrinkage of the glomerulus, proliferation and neukrosis).
Keyword: Nile tilapia, Hepatosomatic indexs (HSI), histopathology