Judul: Analysis and Consumer Preferences Mapping for Instant Fried Noodle in Jabodetabek Area
Abstrak: Mi goreng merupakan varian mi instan yang banyak diminati masyarakat Indonesia. Penelitian bertujuan memperoleh data preferensi konsumen di wilayah Jabodetabek terkait penilaian kepentingan dan kinerja atribut produk, prioritas perbaikan atribut produk, atribut produk yang sesuai dengan harapan responden, gambaran produk ideal, profil sensori produk mi goreng beserta intensitasnya, dan tingkat kesukaan konsumen yang dapat digunakan oleh produsen sebagai acuan dalam pengembangan produk mi goreng instan di masa depan. Metode uji yang digunakan yaitu, Importance Performance Analysis (IPA), gap analysis, serta uji sensori dengan metode Check-All-That-Apply (CATA), Rate-All-That-Apply (RATA), dan rating hedonik. Sampel uji berupa mi goreng instan brand terpilih varian rasa original, ayam bakar limau, dan korean cheese buldak. Hasil uji IPA menunjukkan bahwa atribut aroma dan varian rasa merupakan atribut dengan prioritas utama. Hasil uji gap analysis menunjukkan bahwa atribut ‘ketersediaan di pasaran’ Mie Sedaap goreng mampu memuaskan responden. Berdasarkan metode CATA, atribut sensori rasa asam, aroma cabai, dan warna kuning kemerahan dinilai ideal oleh panelis. Berdasarkan metode gabungan CATA dan RATA, sampel original didominasi oleh warna kuning kecoklatan, rasa umami, mouthfeel bawang, dan aftertaste bawang. Sampel ayam bakar limau didominasi oleh aroma daun jeruk, mouthfeel daun jeruk, dan aftertaste daun jeruk. Sampel korean cheese buldak didominasi oleh aftertaste pedas, mouthfeel pedas, aroma keju, dan warna kuning kemerahan. Ayam bakar limau merupakan varian dengan tingkat kesukaan paling tinggi menurut hasil uji rating hedonik., Fried noodle is a popular variant of instant noodles in Indonesia. The study aims to obtain data about consumer preferences in Jabodetabek which consist of rating importance and performance of product attributes, the priority of product attribute improvement, product attributes that are able to satisfy respondents’expectations, descriptions of ideal products, sensory profile and its intensity, and preference level of the product which can be used as a reference for instant fried noodle product development. The method used consists of Importance Performance Analysis (IPA), gap analysis, and sensory testing using the Check-AllThat-Apply (CATA), Rate-All-That-Apply (RATA), and hedonic rating methods. The samples were selected brand of instant fried noodle in original, lime roasted chicken, and korean cheese buldak flavor The IPA test shows that aroma and flavor variant are the top priority attributes. The gap analysis test shows that the 'availability in the market' attribute of fried Sedaap noodles is able to satisfy respondents. Based on the CATA method, sour taste, chili aroma, and reddish yellow color are considered ideal by panelists. Based on the combined of CATA and RATA methods, the original sample was dominated by brownish yellow color, umami flavor, onion mouthfeel, and onion aftertaste. The lime grilled chicken sample was dominated by lime leaf aroma, lime leaf mouthfeel, and lime leaf aftertaste. The korean cheese buldak sample was dominated by spicy aftertaste, spicy mouthfeel, cheese aroma, and reddish yellow color. Lime grilled chicken has the highest level of liking according to the hedonic rating test result
Keyword: CATA, gap analysis, instant fried noodle, IPA, RATA

Judul: Analysis Country of Origin and Instant Noodles Attribute on Repurchase Intention in Indonesia (Study Case Instant Noodles Indonesia and South Korea)
Abstrak: Indonesia merupakan negara dengan tingkat konsumsi mi instan tertinggi kedua di dunia 2021, dengan pangsa pasar mi instan dalam negeri dikuasai oleh brand domestik. Namun secara ekspor mi instan Indonesia 2020 menempatkan urutan ke-3 di dunia. Penelitian ini melakukan perbandingan produk domestik dan impor dalam mendukung peningkatkan penjualan dan perluasan pangsa pasar mi instan Indonesia di dalam dan luar negeri, dengan menggunakan mi instan Indonesia dan Korea Selatan sebagai objek penelitian. Tujuan penelitian ini adalah mengidentifikasi profil konsumen, menganalisis pengaruh country of origin dan atribut mi instan terhadap kepuasan konsumen, serta menganalisis kepuasan konsumen dan loyalitas pelanggan terhadap minat beli ulang. Metode penentuan sampel menggunakan purposive sampling dan quota sampling yang melibatkan 384 responden. Hasil penelitian menunjukkan karakteristik responden didominasi oleh wanita dengan rentang usia 18 sampai 24 tahun yang sebagian besar ditingkat pendidikan adalah sarjana (D4/S1) dan memiliki pendapat dibawah Rp 4.420.000 per bulan. Hasil analisis SEM Partial Least Squares (PLS) menunjukkan country of origin dan harga tidak pengaruh signifikan terhadap kepuasan konsumen dikedua objek. Variabel kualitas dan etnosentrisme memiliki pengaruh signifikan terhadap kepuasan konsumen hanya pada mi instan Korea Selatan, serta kepuasan konsumen dan loyalitas pelanggan memiliki pengaruh signifikan terhadap niat beli ulang., Indonesia has the second highest consumption of instant noodles worldwide in 2021 as instant noodles market share is dominated by domestic brands. However, in terms of exports of instant noodles, Indonesia 2020 ranks 3rd in the world. This study compares domestic and imported products in support of increasing sales and expanding the market share of Indonesia instant noodles, using Indonesia and South Korean instant noodles as research objects. The aim of this research was to identify consumer profiles, analyze country of origin effect, and attributes of instant noodles on consumer satisfaction, and analyze consumer satisfaction and customer loyalty on repurchase intention. The method of sample determination is purposive and quota sampling with 384 respondents. The results showed that respondent characteristics were dominated by women aged 18 to 24 with an undergraduate level of education (D4/S1) and incomes below Rp4.420.000 per month. The results of the SEM Partial Least Squares (PLS) analysis show that country of origin and price have no significant effect on consumer satisfaction in both objects. Quality and ethnocentrism variables have a significant effect on consumer satisfaction only on South Korean instant noodles, and consumer satisfaction and customer loyalty have a significant effect on repurchase intention.
Keyword: country of origin, ethnocentrisme, instant noodles attribute, repurchase intention

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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