Judul: The Development of Voting Result Data Transfer to the Central Tabulating Facilities.
Abstrak: Advances in election voting process nowadays has triggered the application of virtualization technique in several countries. Most studies raised concern about Online Voting which provides cost saving and convinience. The voting system using virtual network technology aims to reduce considerable calculation time as well as necessary human resources. Despite this, Indonesia still performs voting during election manually. Therefore, this research is performed to study the application of small scale Online Voting at the Department of Computer Science, Bogor Agricultural University as well as studying its further possibility for applying this technique in larger scales. Considering the complexity in building a complete secure online election voting process, this research is focused only in developing a system to send vote from voter to Central Tabulating Facilities (CTF) by implementing a modified secure election protocol with Two Central Facilities. It is also conducted to implement earlier research recommendations to make the system more secure as well as how to integrate an election voting system from a single host into multiple hosts by using Java Web Start Technology. Keywords: Online Voting, voter, Central Tabulating Facilities, Two Central Facilities
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Judul: Analysis and Development of Tabulation System Two Based on Central Facilities Protocol.
Abstrak: An Elections is a form of democracy by which a society appreciate freedom to vote. In many countries such as Indonesia elections are still held conventionally. The Elections that Indonesia has just held to choose a leaders of state and nation are still requiring a very large cost and other strategic resources such as human resources, place, and time. One solution that can reduce this problem is by holding online voting. However, as the conventional election, this online voting system cannot be completely free from all forms of cheating threats that may occur. Therefore, the system which will be built should fulfill secure voting requirements in order to ensure every threats can be prevented. One protocol that can fulfill most secure voting requirements and have very good security level is the Two Central Facilities Protocol. This protocol has two facilities, one of it is the Central Tabulating Facilities (CTF). CTF is the central tabulation of electoral votes which play a very important role in elections. CTF is also responsible for publishing the election results to the audience. A Good and interesting publication by CTF may also attract attention and help the audiences to understand the published message easier. Keywords: online voting, cryptographic, cryptographic protocol, Central Tabulating Facilities, Central Legitimization Agency, Two Central Facilities protocol.
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Judul: Karakteristik Kimia dan Spektrum Ekstrak Pigmen Bunga Kecombrang (Etlingera elatior (Jack) R. M. Sm) dan Lengkuas Merah (Alpinia purpurata (Vieill.) K. Schum)
Abstrak: Bunga kecombrang dan lengkuas merah memiliki warna bunga merah yang menarik, namun informasi mengenai karakteristik kimia dan spektrum ekstrak pigmen nya masih minim. Penelitian ini bertujuan untuk mengeksplorasi karakteristik kimia dan spektrum ekstrak pigmen kecombrang dan bunga lengkuas merah. Sampel diekstraksi menggunakan pelarut metanol 70% yang diasamkan dengan metode ekstraksi sonikasi. Ekstrak pigmen bunga dianalisis senyawa fitokimia kualitatif, total fenolik, total antosianin monomerik, total flavonoid, aktivitas antioksidan metode DPPH dan FRAP, pengaruh variasi pH dan penyimpanan terhadap warna dan spektrum dan pemisahan serta identifikasi senyawa pigmen dominan menggunakan TLC dan LC-MS/MS. Data dianalisis secara statistik dengan uji t tidak berpasangan dan uji deskriptif. Kedua ekstrak pigmen bunga mengandung senyawa fitokimia yaitu flavonoid, saponin dan tanin, dengan senyawa terpenoid, steroid dan alkaloid tidak terdeteksi. Kandungan total fenolik, total antosianin monomerik, total flavonoid dan aktivitas antioksidan metode FRAP tertinggi dimiliki oleh ekstrak pigmen bunga lengkuas merah yaitu sebesar 57,74 ± 4,53 mg GAE/g bunga segar bk, 0,10 ± 0,00 mg Cy-3- gE/g bunga segar bk, 9,34 ± 0,74 mg QE/g bunga segar bk dan 27,96 ± 2,91 mg AAE/g bunga segar bk. Ekstrak pigmen bunga kecombrang memiliki nilai IC50 yang lebih kecil yaitu 24,99 ± 0,31 mg/L. Variasi pH dapat mempengaruhi warna ekstrak pigmen kedua jenis bunga, di mana terjadi perubahan warna dari merah, tidak berwarna, ungu dan kuning pada variasi pH 1-14. Ekstrak pigmen bunga lengkuas merah memiliki kestabilan warna yang unik pada pH 6 dan 8, yaitu memiliki kemampuan mempertahankan warna merahnya selama 9 hari pengamatan. Profil spektra ekstrak pigmen bunga kecombrang memiliki dua puncak penyerapan maksimum yaitu 278 – 279 nm dan 512 nm. Pada ekstrak pigmen bunga lengkuas merah memiliki tiga puncak penyerapan yaitu 266 – 267 nm, 348 – 349 nm dan 513 – 514 nm. Pemisahan komponen senyawa pigmen ekstrak bunga kecombrang menggunakan TLC menghasilkan sebanyak 5 bercak (spot) dengan nilai Rf 0,53 diprediksi merupakan sianidin-3-glukosida. Pada ekstrak pigmen bunga lengkuas merah menghasilkan sebanyak 7 bercak (spot) dengan nilai Rf 0,43 diprediksi merupakan sianidin. Senyawa penyusun warna dominan pada ekstrak pigmen bunga kecombrang teridentifikasi dengan produk massa ion 287 m/z dan 449 m/z adalah senyawa sianidin-3-glukosida. Senyawa penyusun warna dominan pada ekstrak pigmen bunga lengkuas merah teridentifikasi dengan produk massa ion 287 m/z, 449 m/z dan 595 m/z adalah senyawa sianidin-3-rutinosida. Ekstrak pigmen bunga lengkuas merah secara kuantitatif mengandung senyawa fitokimia yang lebih tinggi dibandingkan dengan ekstrak pigmen bunga kecombrang. Kedua ekstrak pigmen menunjukkan karakteristik senyawa pigmen antosianin kelompok sianidin yang tidak terasilasi dan tidak terkopigmentasi.
Keyword: antosianin, bunga kecombrang, bunga lengkuas merah, fitokimia, spektrum