Judul: The Influence of Perception and Attitude on Motivation to  Use E-wallet During the Covid-19 Pandemic.
Abstrak: Adanya skenario normal baru di masa pandemi Covid-19 menyebabkan terjadinya perubahan perilaku konsumen dalam memanfaatkan penggunaan e wallet sebagai pengganti uang tunai dalam bertransaksi baik secara langsung ataupun online. Penelitian ini bertujuan untuk menganalisis pegaruh persepsi, sikap terhadap motivasi penggunaan e-wallet mahasiswa IPB selama pandemi Covid-19. Penelitian ini menggunakan desain eksplanatori yang melibatkan 157 mahasiswa IPB University dengan menggunakan teknik voluntary sampling. Hasil uji korelasi menunjukan bahwa tidak ada hubungan signifikan antara karakteristik dengan variabel yang diteliti, persepsi dan sikap berhubungan positif signifikan dengan motivasi penggunaan e-wallet selama pandemi Covid-19. Hasil uji regresi linear berganda menunjukan karakteristik uang saku per bulan berpengaruh positif terhadap motivasi, lalu variabel persepsi dan sikap berpengaruh positif signifikan terhadap motivasi penggunaan e-wallet., The existence of a new normal scenario during the COVID-19 pandemic causes changes in consumer behavior in utilizing the use of e-wallet as a substitute for cash in transactions, either in person or online. This study aims to analyze the effect of perceptions and attitudes on the motivation to use e-wallet for IPB students during the Covid-19 pandemic. This study uses an explanatory design involving 157 IPB University students using voluntary sampling technique. The results of the correlation test show that there is no significant relationship between the characteristics and the variables studied, perceptions and attitudes have a significant positive relationship with the motivation to use e-wallet during the Covid-19 pandemic. The results of the multiple linear regression test showed that the characteristics of the monthly allowance had a positive effect on motivation, then the perception and attitude variables had a significant positive effect on the motivation to use e-wallet
Keyword: attitude, e-wallet, Covid-19 pandemic, motivation, perception

Judul: Pengaruh Perceived Usefulness, Perceived Ease of Use, dan Perceived Risk terhadap Intention to Reuse ShopeePay pada Masa Pandemi COVID-19
Abstrak: World Health Organization telah menganjurkan kebijakan physical distancing untuk mengurangi kontak fisik, termasuk transaksi pembayaran selama masa pandemi COVID-19. Pembayaran digital merupakan salah satu alternatif untuk mengurangi risiko selama masa pandemi COVID-19. Salah satu pembayaran digital teratas selama masa pandemi COVID-19 ialah ShopeePay. Penelitian ini secara garis besar bertujuan untuk menganalisis pengaruh perceived usefulness, perceived ease of use, dan perceived risk terhadap intention to reuse ShopeePay di Jabodetabek. Responden pada penelitian ini sebanyak 492 responden. Teknik penentuan sampel dilakukan menggunakan non probability sampling dengan metode judgmental sampling. Teknik analisis data yang digunakan adalah analisis deskriptif dan SEM PLS. Hasil dari penelitian ini menunjukkan bahwa perceived usefulness, perceived ease of use, dan perceived risk memiliki pengaruh positif signifikan terhadap Intention to Reuse ShopeePay pada masa pandemi COVID-19. Kata kunci : Intention to Reuse, perceived usefulness, perceived ease of use, perceived risk, shopeepay, World Health Organization has recommended a physical distancing policy to reduce physical contact, including payment transactions during the COVID-19 pandemic. Digital payments are an alternative to reduce risk during the COVID-19 pandemic. One of the top digital payments during the COVID-19 pandemic was ShopeePay. This study broadly aims to analyze the effect of perceived usefulness, perceived ease of use, and perceived risk on the Intention to Reuse ShopeePay in Jabodetabek. Respondents in this study were 492 respondents. The sampling technique was carried out using non probability sampling with judgmental sampling method. The data analysis technique used is descriptive analysis and SEM PLS. The results of this study indicate that perceived usefulness, perceived ease of use, and perceived risk have a significant positive effect on ShopeePay's Intention to Reuse during the COVID-19 pandemic. Keywords: Intention to Reuse, perceived usefulness, perceived ease of use, perceived risk, shopeepay
Keyword: Intention to Reuse, Perceived Usefulness, Perceived Ease of Use, Perceived Risk, ShopeePay

Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh.
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. ,,,
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular.