Judul: Object Oriented Programming on Finite Element Method
Abstrak: Pemrograman Berorientasi Objek (PBO) merupakan sebuah pendekatan dalam penulisan program komputer yang kompleks. Bahasa pemrograman terpopuler yang mendukung PBO adalah C++. Dalam pemrograman numerik yang kompleks, C++ dapat mengatur kompleksitas program dalam bentuk tingkatan dari abstraksi dan metode untuk mengekspresikan konsep matematika. Paradigrna dari PBO pada pemrograman numerik yang kompleks telah memimpin pengembangan PBO pada Numerik Berorientasi Objek (NBO). Salah satu aplikasi dari NBO dalam bidang numerik adalah penerapan metode elemen hingga (MEH) dalam membagi sebuah bentuk permasalahan menjadi sejumlah berhingga daerah yang lebih kecil yang digunakan untuk menganalisis secara parsial dari bentuk bangun semula yang utuh. Kompleksitasnya terletak pada pengaturan dan keterbatasan sumber daya komputer, struktur data dan algoritma program, serta waktu proses yang lama. Polimorfisme saat kompilasi, pemakaian fungsi kawan dalam pembebanlebihan operator, generitas fungsi, dan tidak terdapatnya konsep pewarisan, merupakan prinsip PBO yang dipelajari pada MEH. PBO pada MEH memberikan sebuah kerangka kerja yang efisien dan fleksibel dari konsep matematika abstrak yang diekspresikan dengan objek abstrak serta memberikan kemudahan dalam memodifikasi, mengembangkan, dan mempelajari struktur program.
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Judul: Algoritma dan pemrograman pemecah ekspresi numerik
Abstrak: Sampai saat ini, program-program compiler umumnya belum menyediakan fasilitas untuk mengolah masukan berbentuk ekspresi, sehingga kemampuan memecah ekspresi pada perangkat lunak pengolah data yang tersedia menjadi terbatas. Karya Ilmiah ini berisi karakteristik pemecah ekspresi numerik beserta modulnya yang dapat digunakan dengan lebih lentur, sehingga diharapkan dapat mengatasi kelemahan di atas. Modul dengan teladan ini dapat dioperasikan pada mikrokomputer IBM PC/XT. Modul tersebut dapat dikembangkan dengan menambah prosedur-prosedur baru untuk menghitung operan berbentuk fungsi. Kumpulan prosedur untuk menghitung beberapa fungsi peluang, yaitu : Normal, Fisher, dan t-Student, telah tersedia dalam sebuah modul.
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Judul: Seroprevalence of Chikungunya and The Risk of Transmission Transmitted Among Blood Donors In Sulawesi-Indonesia
Abstrak: Chikungunya (CHIK) is an arthritogenic alphavirus in the Togaviridae family of arboviruses with an enveloped RNA containing a positive single-stranded 11.8 kb genome. Transmission occurs through the bite of infected Aedes mosquitoes, which are commonly found in tropical and temperate regions. Primary vertebrate hosts include monkeys and humans, in whom this virus replicates efficiently (Diallo et al. 1999). Chikungunya virus (CHIKV) is known for causing acute illness, manifesting with fever, rash, and arthralgia known as Chikungunya fever (Horwood dan Buchy 2015). Despite the high number of Chikungunya cases in Indonesia, comprehensive data are lacking in CHIKV seroprevalence. Previous studies reported the median seroprevalence of anti-CHIKV antibodies in all situations 18.5%, ranging from 0.0 – 73.% (Harapan et al., 2019). However, the gap in epidemiological data of CHIKV in many regions of Indonesia including Sulawesi, is noteworthy. The objective of this study was to determine the seroprevalence of CHIKV infection among healthy individuals from North and South Sulawesi using archive samples. Additionally, an asymptomatic course of CHIKV infection and the high pre-symptomatic viral load as 108pfu/mL (Appassakij et al. 2013) suggest that the infection can threaten blood transfusion safety. Evidence of CHIKV infection among blood donors (Simmons et al. 2016) indicates transfusion-transmitted is probable, although it has not been documented (Petersen dan Epstein 2014). Our study also aimed to test the archive blood donor specimens from North Sulawesi for CHIKV IgM and viremia to determine blood safety in endemic areas. Samples were screened for anti-CHIKV IgG antibodies to determine exposure to CHIKV using an in-house IgG ELISA as previously described (Kosasih et al. 2013) with minor modifications. CHIKV IgM, a marker for recent infection and endemicity, was tested in 303 samples randomly selected from IgG-positive samples using a Euroimmun anti-CHIKV IgM ELISA kit (Luebeck, Germany) following the manufacturer’s instructions. CHIKV RNA detection was carried out using one-step-qRT-PCR. The data generated were analyzed with IBM-SPSS v20 (IBM Corporation, USA). Chi-square (χ2) test to determine significant differences between categorical variables, and a p-value less than 0.05 was considered statistically significant. As many as 1092 serum and plasma samples were analyzed, with CHIK IgG seropositivity at 53.48% (584/1092). The results also show a statistically significant difference in the seropositive rates based on gender (58.8% male and 48.5% female) and region (53.9% South Sulawesi versus 48.7% North Sulawesi). Seropositivity increased with age; approximately half of adults between their 40s and 60s had seroconverted. Most of the participants, 304 (27.8%), were between 21-30 years. The age groups with the least participants were those >60 years and <20 years, with 93 participants each (8.5%), followed by the 51–60-years age group with 142 (13.0%) participants. In addition to IgG, the overall anti-CHIKV IgM seropositivity comprised 12.9% (39/303). A Chi-square analysis shows a statistical significance of anti-CHIKV IgM seropositivity based on gender and region with p-values (p=0.047 and p=0.038, respectively). On the contrary, there was no significant difference in anti-CHIK IgM based on age. The age group with the most participants was the 21-30 years with 19.3% (16/83), while those with the least participants were those >60 years. The current study
Keyword: Chikungunya, Serosurvey, Sulawesi, Blood donors, ELISA, qRT-PCR.