Judul: Studi Preferensi Varietas Unggul Beras pada Konsumen dari Beberapa Wilayah yang Mewakili Konsumen Beras Indonesia
Abstrak: Indonesia is an agricultural country. One of the most important agriculture product is rice which is a staple food for people of Indonesia. Every province in Indonesia has a difference of high yielding variety of rice. It relates to the acceptance and preference of the consumers which are influenced by social environment and origin of area of the consumers where they live. The preference of consumers and the palatability determine quality and sensory characteristic of rice. This study aimed to characterize the sensorial quality of rice, identify preference of consumers to cooked rice, and to relate between the preference and the sensory descriptive of cooked rice. Four domestic high yielding varieties were evaluated by trained sensory panels and 152 peoples who consist of peoples from West Java, West Sumatra, South Sulawesi, and Papua. The result showed that the preference of consumers from West Java and South Sulawesi was influenced by the taste and texture of cooked rice. They less liked taste and texture of cooked rice from Cisokan. Thr preference of these consymers to the taste and texture of Ciherang and Membramo rice was more than those of Cisokan. However, the consumers from West Sumatra less prefered taste, aroma, and texture of cooked rice from Ciliwung. The consumers from Papua less prefered aroma of cooked rice from Ciherang. According to consumers, the sensory characteristics most important to acceptance of cooked rice were pandan aroma, vanilla aroma, nutty aroma, salty, umami, hardness, particle size, and roughness of mass. Using descriptive data, the researcher evaluated predictive models of cooked rice from high yielding varieties’ preference. Data collected here could be useful for Indonesian’s government in developing an understanding of the drivers of high yielding varieties of rice acceptance.
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Judul: Consumer Perceptions and Preferences on Bulog SPHP Rice in Bogor Regency
Abstrak: Ketergantungan masyarakat yang tinggi terhadap beras berimplikasi kepada kebutuhan beras yang besar di Indonesia. Untuk menjaga ketahanan pangan pemerintah membentuk Badan Urusan Logistik (Bulog). Secara garis besar Bulog mengemban dua tugas yaitu tugas publik dan usaha komersial. Namun, berdasarkan penelitian terdahulu persepsi masyarakat terhadap beras Bulog masih negatif. Padahal persepsi dapat membentuk preferensi konsumen dan memengaruhi keputusan pembelian konsumen. Penelitian ini bertujuan untuk menganalisis proses keputusan pembelian dan persepsi konsumen serta menganalisis atribut beras yang menjadi preferensi konsumen. Penelitian ini menggunakan data primer dari survey langsung kepada 100 responden. Analisis deskriptif digunakan untuk menganalisis proses keputusan pembelian dan persepsi konsumen. Persepsi konsumen juga dianalisis menggunakan uji Mann-Whitney. Preferensi konsumen dianalisis menggunakan analisis konjoin. Hasil penelitian menunjukkan persepsi konsumen beras SPHP (Stabilisasi Pasokan dan Harga Pangan) di Kabupaten Bogor secara garis besar sudah positif. Namun, persepsi konsumen terhadap ketersediaan produk masih kurang baik. Dari sisi preferensi, konsumen lebih menyukai beras dengan harga Rp 11.000 – Rp 11.500 per kg, tekstur beras pulen, kemasan 5 kg dan beraroma. Atribut kepulenan menjadi atribut yang paling penting menurut responden., The high dependence of society on rice has implications for the large demand for rice in Indonesia. To maintain food security, the government formed the Logistics Affairs Agency (Bulog). In general, Bulog carries out two tasks, namely public duties and commercial efforts. However, based on previous research, public perception of Bulog rice is still negative. Even though perceptions can shape consumer preferences and influence consumer purchasing decisions. This research aims to analyze the purchasing decision process and consumer perceptions as well as analyzing the rice attributes that consumers prefer. This research uses primary data from a direct survey of 100 respondents. Descriptive analysis is used to analyze the purchasing decision process and consumer perceptions. Consumer perceptions were also analyzed using the Mann-Whitney test. Consumer preferences are analyzed using conjoint analysis. The results of the research show that consumers' perceptions of SPHP (Food Supply and Price Stabilization) rice in Bogor Regency are generally positive. However, consumer perceptions of product availability are still not good. In terms of preferences, consumers prefer rice priced at IDR 11,000 – IDR 11,500 / kg, the texture of the rice is fluffier, the packaging is 5 kg and it is flavorful. The attractiveness attribute is the most important attribute according to respondents.
Keyword: Analisis konjoin, Beras, persepsi konsumen, preferensi konsumen

Judul: Konstruksi aritmetika kurva eliptik F(2m) supersingular dan non-supersingular untuk skema kunci publik ElGamal
Abstrak: Algoritme ElGamal adalah salah satu algoritme kunci publik dengan aritmetik modular p yang mempunyai struktur grip siklik Z(p). Tingkat keanaman algoritme ini terletak pada pemecahan masalah logaritme diskret dari Z(p). Akan tetapi, tingkat keamanan tadi tahun ke tahun semakin menurun yang disebabkan kemampuan pemecahan algoritme diskret semakin meningkat. Untuk memenuhi tingkat keamanan yang memadai dibutuhkan p yang cukup besar yang menyebabkan proses enkripsi dan dekripsi menjadi lambat.
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