Judul: Faktor-Faktor yang Mempengaruhi Volume Impor dan Kebijakan Impor Bawang Merah (A. Ascalonicum L.) Indonesia
Abstrak: Shallot is a horticulture commodities that has a high economic value and a large market opportunity as a seasoning for a consumption of the household, the material for industry and to fulfill the export quota. This research analyze the factors that influence the volume of shallot import in Indonesia and formulate alternative policy strategies shallot imports in Indonesia. Multiple linear regression method showed that shallot import volume is significantly influenced by shallot import prices, exchanges rate Rupiah against U.S. Dollar and import tarif 25. Import tariff policies were set by the government during this time will increaseshallot imports to Indonesia. Furthermore, the import tarif still set low for the countries that do not bound by the special agreements that make the opportunity of shallot import is easier to Indonesia.
Keyword: shallot, policy, import

Judul: The Impact of Policies and Determinants of Indonesian Garlic Imports from China
Abstrak: Bawang putih merupakan komoditas hortikultura yang ditargetkan pemerintah untuk swasembada di tahun 2021 untuk memenuhi permintaan bawang putih nasional. Akan tetapi, produksi bawang putih domestik masih belum mampu memenuhi permintaan tersebut. Dengan demikian, sebagian besar kebutuhan akan bawang putih dalam negeri dipenuhi dengan melakukan impor bawang putih dari negara produsen bawang putih. Cina merupakan produsen bawang putih terbesar di dunia yang juga merupakan negara pengekspor utama bawang putih ke Indonesia. Penelitian ini bertujuan menganalisis pengaruh kebijakan dan faktor penentu impor bawang putih Indonesia dari Cina tahun 1996 hingga 2019 menggunakan analisis regresi linier berganda dengan metode Ordinary Least Square (OLS). Berdasarkan hasil estimasi, variabel yang berpengaruh signifikan terhadap volume impor bawang putih dari Cina adalah harga bawang putih impor, harga bawang merah domestik, populasi Indonesia, dan kebijakan penghapusan tarif. Sedangkan nilai tukar riil dan kebijakan RIPH tidak berpengaruh signifikan terhadap volume impor bawang putih dari Cina., Garlic is a horticultural commodity targeted by the government for self-sufficiency in 2021 to fulfill the national demand. However, garlic production is still unable to meet the domestic demand. Thus, most of the domestic demand for garlic has been fulfilled by importing garlic from garlic producing countries. China is the largest producer of garlic in the world and is the main exporter of garlic to Indonesia. This research aims to analyze the policies impact and determinants of Indonesian garlic imports from China since 1996 to 2019 using multiple linear regression analysis with the Ordinary Least Square (OLS) method. Based on the estimation results, the variables that significantly affect the volume of imported garlic from China are the price of imported garlic, the price of domestic shallots, the population of Indonesia, and tariff elimination policy. Meanwhile, the real exchange rate and the RIPH policy did not significantly affect the import volume of garlic from China.
Keyword: China, horticultural, Ordinary Least Square

Judul: Perhitungan Energi Disosiasi Ca-O dan C-O pada Gugus Fungsi Hidroksiapatit Menggunakan PemodelanSpektroskopi Inframerah
Abstrak: Modeling the functional groups of hydroxyapatite can be used to obtain absorption wave numbers and the spring constant. Analysis of energy release is done by calculating the functional group dissociation energy. This study is a theoretical calculation of the hydroxyl group (OH-), phosphate (PO43-), and carbonate (CO32-) using spring models. Modeling OH- group obtained wavenumber absorption 3417.4316 cm-1, 3430.6485 cm-1, and 3437.4887 cm-1. Modelling group PO43- absorption wave numbers obtained 1059.3734 cm-1, 1085.2559 cm-1, and 1070.2309 cm-1. CO32- modeling group obtained wavenumber absorption 1187.5995 cm-1, 1167.7597 cm-1, and 1120.2595 cm-1. Bond dissociation energy of CO on the hydroxyl group is 572.3579 kJ/mol. Bond dissociation energy of Ca-O in the carbonate group is 586.9238 kJ/mol, whereas the carbonate group is 677.4847 kJ/mol. Theoretical absorption wave numbers OH- and PO43- consistent with the hypothesis while CO32- group is smaller than the hypothesized value.
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