Judul: Kualitas Tidur Karyawan di Jakarta
Abstrak: DKI Jakarta adalah ibukota Indonesia dan telah menjadi kota megapolitan. DKI Jakarta juga merupakan pusat bisnis dan pemerintahan, sehingga warga dan pekerja di Jakarta memiliki aktivitas yang tinggi. Aktivitas yang tinggi seringkali dikaitkan dengan kualitas tidur. Tidur adalah keadaan ketika otak tidak mengolah informasi dari neuron sensorik dan tidak memberi perintah ke neuron motorik. Tujuan dari penelitian ini adalah untuk mengumpulkan data dan menentukan kualitas tidur karyawan di Jakarta. Kualitas tidur 295 responden diuji dengan menggunakan metode Pitssburgh Sleep Quality Index (PSQI). Hasil menunjukkan bahwa karyawan yang lebih tua memiliki kualitas tidur lebih baik dibandingkan dengan karyawan yang lebih muda. Analisis statistik menunjukan bahwa ada korelasi negatif antara usia dan kualitas tidur (p=0.0322). Baik karyawan laki-laki ataupun karyawan perempuan memiliki kemiripan persentase antara kualitas tidur yang baik dan kualitas tidur yang buruk. Jadi, jenis kelamin tidak secara signifikan mempengaruhi kualitas tidur dan tidak ada korelasi antara jenis kelamin dan kualitas tidur (p=0.1615). Penghasilan dan pendapatan secara tidak langsung bukan merupakan faktor penting yang berhubungan dengan kualitas tidur. Analisis statistik menunjukan bahwa kualitas tidur tidak berkorelasi dengan pendapatan (p=0.5432) dan pendidikan (p=0.6621).
Keyword: Jenis kelamin, karyawan, kualitas tidur, pendidikan, penghasilan, usia

Judul: Kualitas Tidur Karyawan di Jakarta
Abstrak: DKI Jakarta is a capital city of indonesia and it has became a megapolitan city. DKI Jakarta as a central of business and government also, so its citizens and workers have high activities. High activity is so frequently associated with sleep quality. Sleep is a condition when the brain does not process the information from sensory neurons and does not give the command to motor neurons. The aim of this research were to collect the data and to determine sleep quality of employees in Jakarta. In determining sleep quality, 295 subjects were measured with Pittsburgh Sleep Quality Index (PSQI). Present study shows that sleep quality of older employees better than younger. Statistical analysis indicates that there is significant negative correlation between age and sleep quality (p=0.0322). Either male or female employees have similar percentages between their good and poor sleep quality. Thus, sex does not significantly affect to sleep quality and they have no statistical correlation (p=0.1615). Income and education indirectly are not much important factor in relation to sleep quality. Statistical analysis shows that sleep quality has no statistical correlation to income (p=0.5432) and education (p=0.6621).
Keyword: Age, education, employees, income, sex, sleep quality.

Judul: Detoxification of Cassava’s Acid Hydrolyzate by Activated Carbon Method for Bioethanol Production
Abstrak: Cassava is one of natural resources for carbohydrate that also available for bioethanol production. Starch and fibers hydrolysis maybe conducted on acid condition. The restriction in acid hydrolysis is 5-hydroxymethyl furfural (HMF) and furfural formation, which inhibit yeast fermentation. This study applied two stages of detoxification, which are overliming and activated carbon adsorption methods for lowering HMF and furfural concentrations. In order to obtain tolerable amount in sugar solution, detoxification by activated carbon adsorption was done by concentration of 1%, 2.5%, 5% and 10% and duration of contact are 30 45 and 60 minutes. The results showed that overliming method decreased HMF and furfural concentrations 34.38% and 60.81%, respectively. Overliming followed by 5% activated carbon adsorption for 30 minutes produced the best sugar solution which has a lower HMF and furfural concentrations by 72.03% and 89.11%, respectively. Adsorption constants of HMF and furfural by 5% activated carbon were 0.044 g/min and 3,7 x 10-5 g/min, respectively. The concentration of ethanol produced was 5.00% (b/v) or 63.22% higher than obtained from detoxification by neutralization (NH4OH) which produced ethanol only 3.06%.
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