SYNTHESIS OF Na-A ZEOLITE FROM NATURAL ZEOLITES

Conversion of natural zeolites into Na-A zeolite by the two-step method has been achieved. Synthesis process was conducted at hydrothermal condition 90° and 100° C using alkaline silicates as silica source aluminate as alumina source. The silica was derived from zeolitic tuff and the sodium aluminate was obtained from chemical reagent. Dissolution on zeolitic tuff was made in order to obtain supernatant, Na2SiO3.nH2O. Reaction time for the synthesis ranged from 0.5 – 4 h. It is found that SiO2/Al2O3 molar ratio of 1.6, Na2O/SiO2 molar ratio of 4.41, and Na2O/H2O molar ratio of 60.70, and crystallization time of 4 h give maximum crystallinity. XRD and SEM showed that Na-A zeolite synthesis begins after 1 h and reaches its crystallization maximum. Then Na-A is substituted by Na-X and hydroxysodalite (HS) zeolite. The XRD pattern and SEM image show that microtextural are comparable to the reputed zeolite commercial

Metode Algoritma Genetika Dengan Sistem Fuzzy Logic Untuk Penentuan Parameter Pengendali PID

Proportional-Integral-Derivative ( PID) represents the popular controller which is frequently used in industry and instrumentation equipments. Although in simple design procedure, tuning of PID parameters ( Kp, KiAnd Kd) to get the optimal value is not easy and simple. Genetic Algorithm method with the Fuzzy Logic system is used to get the PID parameters with optimal performance result. Genetic Algorithm is a method that used to solve a problem of optimization based on selection and genetic evolution, while system of fuzzy logic is used to determine the geneticparameter like crossover probability and mutation. In this research, Genetic Algorithm with the Fuzzy Logic system is forming model of direct-current motor to get the parameters of PID controller based on value of mean square error ( MSE). This Examination yielded the stable response system with the value MSE gyrate 0.0027 until 0.0028 and steady state error gyrate 0.004 until 0.001

Learning Management PAI Based on E-Learning at University

The development of science and technology has a positive impact on the world of education. Various types of learning media, such as computers and internet networks, are the key to implementing e-learning learning. This study uses a qualitative descriptive approach. This study aims to describe and analyze the planning, implementation, and evaluation of e-learning-based learning. The results of the research are 1. Planning for PAI learning management based on e-learning at Billfath University Lamongan through creating student and lecturer accounts teachers designing PAI learning based on E-Learning by preparing Semester Implementation Plans (RPS), developing learning materials.2. Implementing E-Learning-Based PAI Learning activities at Billfath University Lamongan include registration of E-Learning accounts for lecturers and students, E-Learning learning process 3. Controlling E-Learning-based PAI learning at Billfath University Lamongan through formative, summative, and formative evaluations, the lecturer gave the task to the students to conclude the material on the methodology of Islamic Religious Education by using an oral test. At the same time, the summative evaluation is carried out at the end of the semester, namely the mid-semester examination (UTS) and the final semester examination (UAS). Controlling E-Learning-based PAI learning at Billfath University Lamongan through an evaluation of the formative method. The lecturer assigns students a task to conclude the methodology of Islamic Religious Education by using an oral test

Implementasi Arbain pada praktik pengabdian masyarakat dalam pengembangan karakter santri Pondok Pesantren Al I’anah Cepu

This article aims to describe, analyze the planning, implementation, as well as the supporting and inhibiting factors for developing the character of the students of the Al I'anah Islamic boarding school through the Arbain program in community service practices. This research was carried out using a descriptive qualitative approach, aiming to understand the phenomena or events that were experienced by the research subjects. The results of this study are: character development planning for the students of Al I'anah Cepu Islamic Boarding School includes: determining the type of character to be developed including; social care, religion, discipline, responsibility, (2) learning models implemented in character development include; Koran sorogan study, yellow book study, habituation. (3) Awareness to act according to character values. Second, the implementation of character development of the students of the Al I'anah Cepu Islamic Boarding School implementing the Arbain program for community service through the design of the heart, thought, taste, and intention as well as sports. Third, the supporting and inhibiting factors for developing the character of students include; the competence of educators, the active role of the local community, the existence of students who are less able to adapt to the environment. AbstrakArtikel ini bertujuan untuk mendeskripsikan, menganalisis perencanaan, pelaksanaan, serta faktor pendukung dan penghambat pengembangan karakter santri pondok pesantren Al I'anah melalui program Arbain dalam praktik pengabdian masyarakat. Penelitian ini dilakukan dengan menggunakan pendekatan kualitatif deskriptif, bertujuan untuk memahami fenomena atau peristiwa yang dialami oleh subjek penelitian. Hasil penelitian ini adalah: perencanaan pengembangan karakter santri Pondok Pesantren Al I'anah Cepu meliputi: penentuan tipe karakter yang akan dikembangkan meliputi; peduli sosial, religius, disiplin, tanggung jawab, (2) model pembelajaran yang diterapkan dalam pengembangan karakter meliputi; Kajian sorogan Alquran, kajian kitab kuning, pembiasaan. (3) Kesadaran untuk bertindak sesuai dengan nilai-nilai karakter. Kedua, pelaksanaan pembinaan karakter santri Pondok Pesantren Al I'anah Cepu yang melaksanakan program Arbain pengabdian kepada masyarakat melalui rancang hati, olah pikir, rasa dan karsa serta olah raga. Ketiga, faktor pendukung dan penghambat pengembangan karakter siswa antara lain; kompetensi pendidik, peran aktif masyarakat sekitar, keberadaan peserta didik yang kurang mampu beradaptasi dengan lingkungan

HUBUNGAN HARGA DIRI DAN DUKUNGAN SOSIAL TEMAN SEBAYA DENGAN PERILAKU KONSUMTIF PADA SISWI DI SMA NEGERI 1 SUNGGAL

This study aims to determine the relationship between self-esteem and peer social support with consumptive behavior using quantitative methods. The research was conducted in senior high school 1 Sunggal. The number of respondents in this study were 169 female students of Senior high school 1 Sunggal with purposive sampling sampling technique. The measuring instrument used in this study is the scale of consumptive behavior, self-esteem scale and peer-scale social support. Based on Spearman rank data analysis obtained a significant level between self-esteem and consumptive behavior with a significant value of 0,000 <0, 05, meaning that there is a partial relationship between self-esteem and consumptive behavior. While the relationship of peer social support with consumptive behavior with a significant value of 0,000 <0, 05. This proves that there is a partial relationship between self-esteem and consumptive behavior. While the significance level of peer social support and self-esteem with consumptive behavior with a significant value of 0,000 <0, 05 are related simultaneously, then the hypothesis in this study is accepted. The correlation between self-esteem and peer-to-peer support with consumptive behavior on female students of senior high school 1 Sunggal is 0.500%. Keywords: Consumptive behavior, self-esteem, peer social support.   Penelitian ini bertujuan untuk mengetahui hubungan harga diri dan dukungan sosial teman sebaya dengan perilaku konsumtif dengan menggunakan metode kuantitatif. Penelitian dilaksanakan di SMA Negeri 1 Sunggal. Jumlah responden dalam penelitian ini adalah 169 siswi SMA Negeri 1 Sunggal. Alat ukur yang digunakan dalam penelitian ini adalah skala perilaku konsumtif, skala harga diri dan skala dukungan sosial teman sebaya. Berdasarkan analisis data rank spearman diperoleh taraf signifikan antara harga diri dengan perilaku konsumtif dengan nilai signifikan 0,000 < 0, 05, artinya membuktikan bahwa terdapat hubungan secara parsial harga diri dengan perilaku konsumtif. Sedangkan hubungan dukungan sosial teman sebaya dengan perilaku konsumtif dengan nilai signifikan 0,000 < 0, 05. Hal tersebut membuktikan bahwa terdapat hubungan secara parsial harga diri dengan perilaku konsumtif. Sedangkan taraf signifikasi dukungan sosial teman sebaya dan harga diri  dengan perilaku konsumtif dengan nilai signifikan 0,000 < 0, 05 berhubungan secara simultan, maka hipotesis dalam penelitian ini diterima. Besar korelasi hubungan harga diri dan dukungan sosila teman sebaya dengan perilaku konsumtif pada siswi SMA Negeri 1 Sunggal sebesar 0.500%. Kata Kunci: Perilaku konsumtif, harga diri, dukungan sosial teman sebaya

Analisis Sikap Mahasiswa Terhadap Hasil Belajar Materi Kuliah Statistik Probabilitas

Research to describe whether the results of the assessment in the affective domain affect student learning outcomes on the subject matter of Probability Statistics. One of the assessments of the affective domain is attitude assessment. The research approach is a quantitative research with an analysis of the research subject of 100 students who have taught the Probability Statistics course. This research was conducted using an instrument in the form of an attitude scale questionnaire based on a Likert scale consisting of 22 questions with answers to questions including: Always (SL) points 5, Often (SR) points 4, Sometimes (K) points 3, Rarely (JR) point 2, and Never (TP) point 1 which is based on the attitude scale instrument grid in the form of a checklist. The indicators measured on the attitude scale are interest, curiosity, attention in learning and self-confidence. The method of analysis in the form of a correlation survey is to see the influence of the affective domain on student learning outcomes. From the results of the research, it is known that the effect of learning outcomes based on student attitudes is the most prominent due to the interest and confidence of students who are in charge of the Probability Statistics course. For curiosity and attention in learning do not have a direct effect on learning outcomes

PREPARATION OF NANO SILICA FROM SILICA SAND THROUGH ALKALI FUSION PROCESS

Silica (SiO2) materials play an important role for industries, especially those in micron or even nano-scale size. The later has better properties and improves its quality. Nano silica is applied widely in building material, notably as a mixture of concrete. The material is also promising to be developed into amorphous nano silicon for solar cell materials. Indonesia has a lot of silica sand resources and faces a challenge to increase its quality into high product such as nano silica. Synthesizing silica nano through alkali fusion is a process that includes using the particles along with sodium hydroxide at temperature of 400-1100 °C then recrystalizing the molecules to get materials in nano size. The recrystalizing process was conducted by water leaching and filtration. The derived nano particles (gel) ranged between 40-60 nm. TEM characterization showed that the products are homoge- neous, well dispersed and has specific surface area around 157 m2/g