Judul: The Effect of Parenting Style and Parental Expectation on Adolescent Self-Concept
Abstrak: Konsep diri yang rendah dapat menunjukkan konsep diri negatif pada remaja dan menjadi faktor penyebab seseorang mengalami berbagai gangguan perilaku dalam perkembangannya. Penelitian ini bertujuan untuk menganalisis hubungan dan pengaruh gaya pengasuhan serta harapan orang tua terhadap konsep diri remaja. Penelitian ini melibatkan 252 responden remaja usia SMA di Indonesia. Penelitian ini menggunakan desain cross-sectional dengan metode voluntary sampling yang dilakukan secara online. Hasil uji korelasi menunjukkan bahwa gaya pengasuhan otoritatif berhubungan positif signifikan dengan konsep diri remaja, sementara gaya pengasuhan otoriter dan permisif berhubungan negatif signifikan dengan konsep diri remaja. Hasil uji regresi menunjukkan bahwa jenis kelamin dan gaya pengasuhan permisif berpengaruh negatif signifikan terhadap konsep diri remaja. Dalam hal ini, laki-laki mempunyai konsep diri yang lebih rendah dibandingkan perempuan. Remaja dengan konsep diri sedang masih perlu meningkatkan konsep diri yang lebih positif agar memiliki kepribadian dan pandangan yang baik terhadap dirinya sendiri. Selain itu, gaya pengasuhan otoritatif orang tua juga perlu ditingkatkan untuk mendukung konsep diri remaja yang lebih baik., A low self-concept can indicate a negative self-concept in adolescents which is a factor causing a person to experience various behavioral disorders in their development. This study aims to analyze the relationship and influence of parenting style and parents' expectations on adolescent self-concept. This research involved 252 respondents of high school age in Indonesia. This study used a cross-sectional design with a voluntary sampling method which was carried out online. Correlation test results show that authoritative parenting style had a significant positive relationship while authoritarian and permissive parenting styles had a significant negative relationship with adolescent self-concept. The results of the regression test showed that sex and permissive parenting style had a significant negative effect on adolescent self-concept. In this case, men had a lower self-concept than women. Adolescents with a moderate self-concept still need to improve a more positive self-concept in order to have a good personality and view of themselves. In addition, parents' authoritative parenting style also needs to be improved to support better adolescent self-concepts.
Keyword: adolescent, parental expectation, parenting style, self-concept

Judul: Gaya Pengasuhan Ibu, Kelekatan dengan Teman Sebaya, dan Konsep Diri Remaja pada Keluarga Ibu Bekerja dan Tidak Bekerja
Abstrak: The aims of this study was to analyze the influence of parenting style of mother and peer attachment on adolescent’s self-concept. Sample of this research were the families with working and nonworking mother had teenager child which is aged 12-15 years who lived in Kebon Pedes and Kedung Badak Village, Tanah Sareal, Bogor City. There were 100 families selected randomly consisting of 50 working mother families and 50 nonworking mother families that were interviewed by questionnaire. The result of corellation test showed there were significant relationships between gender, age of parents and adolescents, family’s income, authoritative parenting, authoritarian parenting, permissive parenting, and peer attachment with adolescent’s self concept. Based on regression test, it was found that variables influenced adolescent’s self concept were adolescent’s allowance, families’s socio-economic, authoritative parenting style, and peer attachment.
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Judul: Rancang Bangun Elemen Pemanas Bahan Bakar Minyak Nyamplung Untuk Motor Bakar Diesel dengan Memanfaatkan Panas Gas Buang
Abstrak: Tamanu oil is one of biosolar substituter as diesel engine fuel. High viscosity of tamanu oil becomes main obstacle in direct using of tamanu oil as diesel engine fuel. Heater element is made to decrease tamanu oil viscosity. Heater element is benefitted high temperature of diesel engine exhaust gas as reheating source. Optimum temperature which is needed to reduce tamanu oil viscosity of 3-5 cSt is 110 Celcius degree (biosolar viscosity of 30oC is 5-7 cSt). IV design of element heater has optimum tamanu oil reheating. There are four kind of tamanu oil that has different treatment. degumming neutralization (N4) tamanu oil has best quality with the lowest viscosity of 30cSt in 30oC. Tamanu oil (N4) usage as fuel occur reduction power of 12.26 %, torsion of 9.59 %, power maximum of diesel engine is 5.39 kW and maximum torsion of 123.74 Nm. Maximum power of diesel engine using biosolar is 5.99 kW and maximum torsion of 144.53 Nm. But then, tamanu oil can replace biosolar (fossil energy), without made as biodiesel first and mixed with biosolar.
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