Urea Core Coating with Crosslinked Hydrophilic Polymers for Controlled Release Fertilizer Application

Controlled release fertilizer (CRF) can be made by coating the fertilizer core with a polymer layer. The simultaneous coating reaction of the polymerization needs to be controlled in the reactor. A controlled reactor system was developed for the polymerization of granular fertilizer coating using integrated electronic control of the 8-bit ATTiny 2313 AVR microcontroller chip. Urea granule fertilizer is coated with hydrophilic polymer polyacrylamide and crosslinked polyacrylate with N,N'-methylene-bis acrylamide (MBA). The reaction was initiated by benzoyl peroxide (BPO) at 61 oC. The coating was successfully formed in 45 minutes reaction. The coating process in the control reactor was more effective than without control, thereby reducing the deposition of polymer deposits that did not coat the fertilizer. The characterization of the fertilizer coating layer based on infrared spectroscopy (FTIR) showed that polymerization synthesis had occurred based on the presence of C=C bonds. The IR spectrum showed a reduced absorption of the C=C stretching vibration medium in the acrylamide monomer compared with the polymer (crosslinked polyacrylamide), namely the wavenumbers of 1614 cm-1 in acrylamide and 1601 cm-1 in polyacrylamide spectrum. Similarly, the loss of C=C absorption in the crosslinked polyacrylate spectrum but appeared in the acrylic monomer spectrum at 1636 cm-1 wave. This group is reduced or lost after polymerization due to an addition reaction

Memperkuat Islam Moderat Melalui Metode Pembelajaran Demokrasi di Madrasah Ibtidaiyah

This paper aims to promote the implementation of the concept of strengthening moderate Islam through democratic learning in Islamic elementary schools. The ease of internet access and remote communication, as the effect of globalization in the field of technology, can be used to gain any information needed, including the Islamic knowledge that can be freely learned without teachers. A literature study was employed to describe the data related to the internalization of moderate Islam and democratic learning. The findings demonstrate that moderate Islam (tawasuth) is a life principle that upholds justice in social life. The values of moderate Islam can be internalized in the school curriculum as a reinforcement starting from the elementary school level through implementing democratic learning. This application can be carried out through various methods such as discussion, question and answer, group work, and simulation. The implementation of democratic learning encourages communicative relationships between teachers and students, fosters friendship, and enhances the value of ‘ukhuwah’ (good relations). Furthermore, these methods emphasize student-centered learning. This study also illustrates that democratic learning provides a wide array of opportunities for students to creatively and critically express their ideas and thoughts in their own learning styles

Sistem Informasi Administrasi Pelatihan dengan Manajemen Workflow Berbasis Web

Proses administrasi pelatihan di Balai Besar Latihan Kerja Industri (BBLKI) Surakarta masih dilakukan secara manual dan belum terintegrasi mulai dari pendaftaran hingga hasil pelatihan. Banyaknya pihak yang terlibat dalam proses pelatihan menyebabkan kesulitan berkoordinasi satu sama lain sehingga banyak waktu terbuang serta menurunkan tingkat kepuasan pelayanan pada peserta pelatihan, selain itu permasalahan ini juga menimbulkan kesulitan dalam pencapaian jumlah target lulusan pelatihan. Penelitian ini bertujuan untuk membuat sistem informasi administrasi pelatihan dengan manajemen workflow berbasis web mulai proses pendaftaran hingga akhir pelatihan secara terintegrasi. Metode penelitian yang digunakan dalam perancangan aplikasi ini menggunakan pengembangan metode WISDM (Workflow-aware Information System Development Methodology). Aplikasi dibangun dengan memodelkan proses pelatihan dan fungsi masing-masing pihak, selanjutnya diaplikasikan menggunakan bahasa pemrograman PHP dan basis data MySQL. Penelitian ini menghasilkan sistem informasi adminstrasi pelatihan dengan manajemen workflow berbasis web yang dapat digunakan sebagai referensi dalam memperbaiki proses pelaksanaan pelatihan mulai dari kepastian waktu dan mengintegrasikan tugas serta fungsi pihak-pihak terkait. Aplikasi ini digunakan oleh siswa, instruktur, pimpinan dan pengelola. Pengujian dilakukan dengan black box functionality testing dan validasi data dengan triangulasi sumber data. Aplikasi telah sesuai dengan fungsi dan tampilan yang diharapkan, sehingga dapat digunakan dalam skala sesungguhnya untuk mendukung proses administrasi pelatihan

Detection and Identification of Detonation Sounds in an Internal Combustion Engine Using Wavelet and Regression Analysis

Improving efficiency and power in an internal combustion engine is always impeded by detonation (knock) problems. This detonation problem has not been explained fully yet. Quick and accurate detection of detonation is also in the development stage. This research used a new method of detonation sound detection which uses microphone sensors, analysis of discrete wavelet transform (DWT), and analysis of the regression function envelope to identify the occurrence of detonation. The engine sound was captured by the microphone; it was recorded on a computer; it was proceeded using a DWT decomposition filtering technique; it was then subjected to normalization and regression function envelope to get the shape of the wave pattern for the vibration. Vibrational wave patterns were then compared to a reference using the Euclidean distance calculation method, in order to identify and provide an assessment decision as to whether or not detonation had occurred. The new method was applied using Matlab and it has yielded results which are quite effective for the detection and identification of detonation and it is also capable of producing an assessment decision about the occurrance of detonation

Kasus mastitis sub klinis pada sapi perah laktasi di Kecamatan Pujon Kabupaten Malang

The purpose of this research was to find out how much cases of subclinical mastitis in Pujon district, Malang regency. This research was conducted in Pujon District of Malang Regency by using survey method. The inclusion criteria of farmers is minimum 2 (two) years of dairy cows. As many as 110 tail of lactation dairy cows from Maron Sebaluh hamlet in Pandesari village and 103 tail of Bakir hamlet in Sukomulyo village were examined against mastitis by using California Mastitis Test (CMT). In addition, direct observation of post-milking treatment and ownership of biogas digesters and as well as interviews using questionnaires was conducted to support data. Data were analyzed descriptively and by using simple statistics. The results showed that in Maron Sebaluh the percentage of cows with subclinical mastitis reached 58.18%, 10.00 % of clinical mastitis and 31.82% negative. Whereas in Bakir, subclinical mastitis reached 59.22%, clinical mastitis 0.97% and 39.81% negative. The number of cows that suffered from mastitis (subclinical and clinical) and got the treatment of dipping post-milking with antiseptic is only 28 cows, fewer than that treated with rinse water, 107 cows. Ownership of biogas digester will not automatically reduce the case of mastitis since the behaviour of farmers in keeping barn hygiene is not maintained. Every position of cow’s teat have risk to be infected by microorganisms that caused mastitis

The Upshot of Workspace and Work Spirit to the Employee Performance Enhancement in Jawa Timur Bank, Branch of Sumenep

This research was conducted at Jatim Bank of Sumenep, with a total sample of 57 people. The objectives of this study are: 1) To find out how the description of the Workspace, work spirit, and employee performance in Jatim Bank, Sumenep Branch; 2) To test and analyze the influence of the Work space and work spirit on employee performance at Jatim Bank of Sumenep Branch; 3) To test nd analyze Work space, and work spirit simultaneously on employee performance at Bank Jatim, Sumenep Branch. Data analysis using SPSS. This type of research is explanatory research using a quantitative research approach. The results showed that: 1) Simultaneously, Work space , and Work Spirit have a significant influence on employee performance at Jatim Bank of Sumenep. So that in this case the hypothesis is accepted and its validity is proven; 2) Partially, the Workspace and Work Spirit have a significant influence on the employee performance of Jatim Bank of Sumenep. So that in this case the hypothesis is accepted and its validity is proven