Judul: The Model of Purchasing Behaviour on E-Catalogue with Theory of Planned Behaviour Approach
Abstrak: E-katalog merupakan salah satu sistem informasi yang memungkinkan pengguna untuk mengakses dan mengelola informasi produk atau jasa yang dibutuhkan pemerintah secara digital. Hadirnya e-katalog membuka peluang bagi para pelaku pengadaan untuk memberikan solusi kemudahan transaksi pengadaan barang dan jasa secara online dan terintegrasi. Selain itu, e-katalog juga berperan sebagai alternatif proses pengadaan yang mudah bagi para pelaku pengadan. Saat ini masih terdapat kesenjangan yang signifikan antara target dan realisasi transaksi e-purchasing melalui e-katalog. Perilaku PPK yang belum optimal dalam pelaksanaan transaksi e-purchasing melalui e-katalog dan rendahnya literasi terhadap regulasi merupakan permasalahan yang dihadapi, sehingga penting untuk mengubah perilaku tersebut. Salah satu teori yang digunakan dalam menganalisis perilaku adalah Theory of Planned Behavior (TPB), yang dalam hal ini diperkaya dengan perceived web quality, self-efficacy, attitude, subjective norms, dan perceived behavioral control. Penelitian ini bertujuan menganalisis faktor-faktor yang memengaruhi purchase behavioral intention menggunakan e-katalog. Faktor dugaan yang dapat memengaruhi purchase behavioral intention adalah perceived web quality, self-efficacy, attitude, subjective norms, dan perceived behavioral control. Penelitian ini dilakukan terhadap 135 responden yang yang telah bertransaksi e-purchasing produk laptop melalui e-katalog. Kemudian dipilih secara simple random sampling yakni pengambilan sampel dari populasi secara acak tanpa memperhatikan strata yang ada dalam populasi dan setiap anggota populasi memiliki kesempatan yang sama untuk dijadikan sampel. Data dikumpulkan dengan cara mengisi kuesioner yang disebarkan secara online. Analisis statistik yang digunakan adalah SEM (Structural Equation Model) dengan menggunakan SmartPLS. Hasil penelitian menunjukkan self-efficacy, attitude, subjective norms, dan perceived behavioral control berpengaruh langsung secara signifikan terhadap purchase behavioral intention. Sementara perceived web quality tidak berpengaruh signifikan. Beberapa bentuk implikasi manajerial yang dapat dilakukan oleh pengelola sistem e-katalog adalah membuat kebijakan yang jelas terkait e-katalog sebagai solusi pengadaan barang dan jasa pemerintah, menyediakan pelatihan pemahaman e-katalog kepada pelaku pengadaan barang dan jasa pemerintah agar memudahkan implementasi pengadaan barang dan jasa melalui e-katalog, serta meningkatkan kualitas e-katalog agar mudah ditransaksikan., E-catalogue is an information system that allows users to access and manage information on products or services needed by the government digitally. The presence of e-catalogue opens opportunities for procurement actors to provide solutions for easy online and integrated goods and services procurement transactions. In addition, e-catalogue also acts as an easy alternative procurement process for procurement actors. Currently, there is still a significant gap between the target and realisation of e-purchasing transactions through e-catalogues. PPK behaviour that is not optimal in implementing e-purchasing transactions through e-catalogue and low literacy of regulations are the problems faced, so it is important to change this behaviour. One of the theories used in analysing behaviour is the Theory of Planned Behavior (TPB), which in this case is enriched with perceived web quality, self-efficacy, attitude, subjective norms, and perceived behavioural control. This study aims to analyse the factors that influence purchase behavioural intention using e-catalogue. The alleged factors that can influence purchase behavioural intention are perceived web quality, self-efficacy, attitude, subjective norms, and perceived behavioural control. This research was conducted on 135 respondents who have transacted e-purchasing of laptop products through e-catalogue. Then selected by simple random sampling, namely taking samples from the population randomly without regard to
Keyword: e-katalog, perceived web quality, self efficacy, theory of planned behaviour

Judul: Fruits and Vegetable Purchase Intentions and Decisions through E-Commerce: Development of Theory of Planned Behavior
Abstrak: Tren pemanfaatan akses internet di Indonesia mengalami peningkatan yang signifikan, termasuk dalam perdagangan elektronik. Pandemi COVID-19 di Indonesia berdampak pada perubahan perilaku konsumen dalam berbelanja dari konvensional menjadi online yang terus meningkat. Perubahan perilaku tersebut untuk mengurangi aktivitas fisik di luar rumah dan memudahkan konsumen dalam belanja. Penelitian ini bertujuan untuk menganalisis pengaruh sikap, norma subjektif, kontrol perilaku, kepercayaan, dan situasi pandemi COVID-19 terhadap keputusan pembelian buah dan sayur melalui e-commerce. Penelitian ini menggunakan data primer yang diperoleh dari 190 responden dengan metode purposive sampling. Data dianalisis menggunakan metode analisis deskriptif dan Structural Equation Model-Partial Least Square (SEM-PLS). Hasil penelitian menunjukkan bahwa variabel kontrol perilaku dan situasi pandemi COVID-19 memiliki pengaruh yang positif dan signifikan terhadap niat dan keputusan pembelian buah dan sayur melalui e-commerce saat pandemi COVID-19., The trend of internet access in Indonesia has experienced a significant increase, including in electronic commerce. The COVID-19 pandemic in Indonesia has an impact on changing consumer behavior in shopping from conventional to online which continues to increase. These behavioral changes can reduce physical activity outside the home and make it easier for consumers to shop. This study aims to analyze the effect of attitudes, subjective norms, behavioral control, beliefs, and the COVID-19 pandemic situation on fruit and vegetable purchasing decisions trough e-commerce. This study uses primary data obtained from 190 respondents with a purposive sampling method. Data were analyzed using descriptive analysis methods and Structural Equation Model-Partial Least Square (SEM-PLS). The results showed that behavioral control variable and the COVID-19 pandemic situation had a positive and significant influence on intentions and decisions to purchase fruit and vegetables through e-commerce during the COVID-19 pandemic.
Keyword: COVID-19, e-commerce, purchasing decision, SEM-PLS

Judul: Penyusunan Overlap Graph menggunakan Suffix Tree pada DNA Sequence
Abstrak: The DNA sequence assembly is very important in genome analysis. This step aims to reconstruct contigous DNA fragment (contigs) from short fragment by concatenating fragments based on the overlap region among them. This method employs overlap graph for solving the problems. In this graph, nodes represent fragments and edges represent overlap. This research developed a software for constructing overlap graph using suffix tree. The evaluation was conducted by measuring the number of nodes, number of edges, and the execution time in many values of minimum overlap. The minimum overlap is defined as the minimum length of substring which is considered as the overlap region between two fragments. The evaluation results showed that the number of nodes, the number of edges, and the execution time were increased with the decreasing of the minimum overlap value.
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