Judul: Tinjauan Status Kepemilikan Pulau Miangas Dalam Perspektif Hukum Internasional (Suatu Pendekatan Sejarah)
Abstrak: Pulau-pulau Indonesia yang berada di daerah perbatasan harus mendapat perhatian khusus, karena plilau tersebut bisa saja dengan mudah diklaim oleh negaranegara tetangga yang notabene dalam konteks sengketa modern negara tetangga memiliki kepentingan untuk dapat mengakses serta mengelola sumberdaya untuk menambah pendapatan negara.
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Judul: Pemanfaatan Ruang Wilayah Pesisir Pulau–Pulau Kecil Terluar (Studi Kasus: Pulau Miangas, Kabupaten Kepulauan Talaud).
Abstrak: Pulau Miangas merupakan salah satu pulau terluar yang berbatasan dengan Negara Filipina yang berada di wilayah administrasi Kabupaten Kepulauan Talaud, Sulawesi Utara. Sumberdaya yang ada memiliki potensi yang besar dalam pengelolaan dan pemanfaatan ruang wilayah pesisir dan lautan yang dimilikinya. Penelitian ini bertujuan untuk menganalisis prospek, kelayakan dan prioritas usaha pemanfaatan sumberdaya pesisir dan laut, menentukan potensi kawasan unggulan di wilayah pesisir dan laut, mengintegrasikan tiponomi wilayah pesisir dan laut, menjabarkan arah kebijakan pengembangan wilayah pesisir dan laut secara optimal dan berkelanjutan di Pulau Miangas. Penelitian ini dilaksanakan di Pulau Miangas selama periode Februari 2016 hingga April 2016. Metode survei observasi dan wawancara digunakan untuk mengumpulkan data primer. Metode analisis Sistem Informasi Geografis (SIG) digunakan untuk menentukan kesesuaian pemanfaatan lahan perairan. Analisis lainnya yang digunakan adalah Analytical Hierarchy Process (AHP) untuk merumuskan solusi konflik pemanfaatan lahan di wilayah pesisir dan laut. Hasil analisis kesesuaian lahan menggunakan SIG menunjukkan bahwa wilayah pesisir Pulau Miangas memiliki peluang untuk berbagai program pembangunan bagi pengelolaan dan pemanfaatan wilayah pesisir, seperti: kawasan pemukiman penduduk, kawasan budidaya rumput laut, kawasan budidaya keramba jaring apung, kawasan budidaya tiram mutiara, dan kawasan konservasi untuk terumbu karang. Hasil analisis pemecahan konflik pemanfaatan ruang wilayah pesisir menggunakan AHP menunjukkan bahwa kriteria yang berpegaruh besar terhadap tujuan analisis pemecahan konflik adalah ketersediaan dan kesesuaian lahan, dan priorias pertama bagi alternatif pengembangan ruang wilayah pesisir Kabupaten Kepulauan Talaud adalah pengembangan kawasan perikanan.
Keyword: kesesuaian lahan, pulau-pulau kecil terluar, Pulau Miangas

Judul: Development of mathematical model for robusta coffee decaffeination process in a single column reactor
Abstrak: Consumers drink coffee not as nutrition source, but as refreshment drink. For coffee consumers who have high tolerance for caffeine, coffee may warm up and refresh their bodies. However high caffeine content in coffee beans may cause health problems to consumers who are susceptible to caffeine. One of the efforts for coffee market expantion is product diversification to decaffeinated coffee. The general objective of this research was to optimize decaffeination process of robusta coffee in single column reactor with leaching method. The specific objectives of this research were to study process characteristic of Robusta coffee decaffeination in single column reactor using acetic acid as solvent, to develop mathematical model for predicting decaffeination time with leaching method, and to optimize process decaffeination of robusta coffee using developed model. Temperature (T) and concentration (c) of solvents were both variables analysed in decaffeination process. Mathematical model validation was checked by comparing prediction time (t-predict) versus observation time (t-obsr). Mathematical model was valid if the result showed that determination coefficient value (R2) > 0.75. Coffee decaffeination was processed using vertical single column reactor. A simple mathematic model for caffeine kinetic description during the extraction process (leaching) of coffee bean was developed. A non-steady diffusion equation coupled with a macroscopic mass transfer equation for solvent was developed and then solved analytically. The kinetic of caffeine extraction from coffee bean was expressed by:         - =- - - + - - 0.3 0.3 ).(4.4106. exp )( 3.3319 10.302)) ln 2 (det) (( 0 0.01282 ( 1041.82 / ) 1 2 A T AS c c c d d t p where d was coffee beans diameter (m), c was solvent concentration (%), T was solvent temperature (K), and cAS was caffeine content at-t (%). In the first step of decaffeination process, coffee beans was steamed during 1.5 hours using water vapour, and continued with leaching process using acetic acid, effluent of fermented cocoa beans, and tertiary solution of fermented cocoa pulp as solvents. Linier regression analysis showed that t-obsr = 0.8914. t-predict + 0.5045 with R2 0.9326 for acetic acid, t-obsr = 0.771.t-predict + 2.8137 with R2 0.9556 for effluent of fermented cocoa beans, and t-obsr = 0.8825.t-predict + 2.8354 with R2 0.7727 tertiary solution of fermented cocoa pulp as solvents. Response Surface Methodology (RSM) showed that optimum condition for coffee beans decaffeination was 0.4976%/hours decaffeination rate and 4.99 hours decaffeination time with 100oC solvent temperature and 69% solvent concentration using acetic acid as solvent; 0.3426%/hours decaffeination rate and 5.68 hours decaffeination time with 100oC solvent temperature and 55% solvent concentration using effluent of fermented cocoa beans as solvents; and 0.3016%/hours decaffeination rate and 6.57 hours decaffeination time with 100oC solvent temperature and 70% solvent concentration using tertiary solution of fermented cocoa pulp as solvent. The developed mathematical model can be used in designing single column reactor for coffee decaffeination process, to predict decaffeination time and rate, and decaffeination process in optimum condition using acetic acid, effluent of fermented cocoa beans, and tertiary solution of fermented cocoa pulp.
Keyword: robusta coffee, mathematical model, decaffeination process, single column reactor