Judul: Menentukan Energi Pemotongan Beberapa Umbi-Umbian Dengan Logam Pemotong (Slicer)
Abstrak: Industri pengolahan bahan hasil pertanian meliputi beberapa unit operasi seperti pengeringan, evaporasi, ekstraksi, pengecilan ukuran, dsb. Pengecilan ukuran ini dapat merupakan proses utama atau proses pembantu pada industri tersebut. Pemotongan merupakan salah satu operasi yang termasuk pengecilan ukuran. Kebanyakan proses yang terjadi di dalam pengolahan bahan pertanian memerlukan energi. Banyaknya energi yang diperlukan bisa berasal dari fosil, air, uap, dsb. Efisiensi sektor produksi adalah salah satu cara untuk menekan biaya. Salah satunya adalah biaya energi. Penghematan energi diperlukan karena biaya energi di dalam produksi masih cukup tinggi. Penghitungan energi di dalam industri pengolahan perlu dilakukan untuk memperoleh infor- masi tentang kebutuhan energi yang digunakan dalam suatu proses pengolahan. Penelitian ini bertujuan untuk menentukan energi yang betul-betul diserap dalam proses pemotongan umbi-umbian. Bahan yang digunakan adalah ubi kayu, ubi jalar, talas dan melibatkan dua faktor perlakuan putaran pisau pemotong (rpm) dan lama penyimpanan (hari). ...
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Judul: Analisis Eksergi pada Proses Pengolahan Kelapa Sawit
Abstrak: Industri pengolahan kelapa sawit merupakan salah satu industri yang padat energi. Penggunaan energi dalam pengolahan kelapa sawit harus efisien sehingga konsumsi energi dapat dikurangi. Kajian mengenai konsumsi energi dapat menggunakan analisis eksergi sehingga dapat diketahui tingkat ireversibilitas dari masing-masing komponen proses pengolahan hingga keseluruhan pabrik. Komponen pengolahan memiliki kemampuan menggunakan energi berguna tertentu untuk proses atau efisiensi eksergi yang dapat dianalisis dengan analisis eksergi. Analisis energi bersifat komvensional masih menggunakan hukum termodinamika pertama. Analisis eksergi berdasarkan hukum termodinamika kedua dengan melibatkan peran langsung lingkungan saat terjadi proses termal. Stasiun yang memiliki tingkat irreversibilitas tertinggi adalah boiler dengan eksergi musnah sebesar 11813.62 kW. Pengolahan kelapa sawit memiliki efisiensi energi 55.3 % dan efisiensi eksergi 30.34 %.
Keyword: Pengolahan Kelapa Sawit, Padat Energi, Analisis Eksergi, Tingkat Irreversibilitas, Efisisensi eksergi

Judul: Influence of parent-child attachment and teacher-student attachment to build self esteem in progressive and conventional school advisor
Abstrak: Self esteem is one’s ability to evaluate him/herself with the award for him/herself and indicates the extent to which a person believes that he/she is capable, meaningful, successful, and worthwhile. High self esteem is characterized by self-confidence and liveliness of children in socializing with the environment. A factor that affects the process of building self esteem is the relationship between parents and children. The relationship is described by mother's sensitivity to respond to signals that the child gives. The immediate or delay respond and, right or wrong respond will affect the relationship in the long term, it is referred to as attachment. The attachment between teacher and student was also expected to influence child’s self esteem. In general, this study was aimed to analyze the influence of the parentchild attachment and teacher-student attachment in building school-age students’ self esteem. This was cross-sectional study, consisting of 5 elementary schools selected purposively recommended by Head of Department of Education in Depok City. The criteria of selected school were homogeneous and characterized as progressive and conventional schools. Thirty students’ families were selected randomly from the fourth and the fifth grade. Total sample were 150 families. Data was collected using questionnaires which is filled by student. The questionnaires are were Parental Bonding Instrument (PBI) to measure parentchild attachment, The Student – Instructor Relationship (SIRS) to measure teacher-student attachment and Self-Esteem Inventory (SEI) to measure child selfesteem. Data was edited, coded, entried into the computer, cleaning the data, and then analyzed. Data was analyzed using descriptive and inferential statistical analysis. Inferential statistical analysis used Spearman and Pearson correlation test, Chi Square, t-test, and linear regression. The result showed that most of the students had high self esteem both in conventional and progressive school’s students. In term of parent-child attachment, showed that care attachment was higher than overprotection attachment on both types of schools, but maternal overprotection attachment from conventional schools was higher than progressive schools. The result also showed that connectedness of teacher-student attachment was higher than anxiety. Spearman correlation test revealed that there were correlation between maternal care attachment and high self-esteem, also between maternal overprotection attachment and low self esteem on both type of schools. There were correlations between connectedness teacher-student attachment and high students’ self esteem, also between anxiety teacher-student attachment and low students’ self esteem on both types of schools. Overall, students’ self esteem was influenced by the attachment between teacher and student. The more anxiety between student and teacher it is likely, the lower student’s self esteem. Maternal care attachment influenced to higher self esteem of child, meanwhile the more overprotection the maternal attachment, the lower self esteem of child. Type of schools had no influence in building child’s self esteem.
Keyword: parent-child attachment, teacher-student attachment, self esteem, progressive school, and conventional school