The cisolok-cisukarame geothermal field is a liquid dominated geothermal system situated in Sukabumi District, West Java, Indonesia. Geothermometry survey shows that Cisolok-Cisukarame has temperature approximately 185-212°C in the reservoir. The temperature of the reservoir shows that this is a medium enthalpy geothermal system. The thermal manifestation distributed around the Cisolok-Cisukarame area when the Cisukarame indicated as the upflow zone and Cisolok as the outflow zone. It is located at the eroded volcanic area with cooling pluton acting as the heat source of the system. Based on EBTKE, Cisolok-Cisukarame geothermal field has 45 MWe possible reserve. NE-SW and N-S faults are acting as the main conduit of the geothermal system. The primary purpose of this study is to build a computer model describing the natural state condition based on the geological, geochemical, geophysical, and well temperature data from several published literature. The model was validated by using mass-heat flow profile obtained from the observation data to achieve the best representation of the actual condition. The condition was achieved by modifying the permeability structures and productivity index. This model is the first natural state model of Cisolok-Cisukarame geothermal field. The natural state model then is used to build an updating conceptual model of Cisolok-Cisukarame by using data from a result of numerical modeling. Based on the parameters obtained from the numerical modeling, a new model of Cisolok-Cisukarame geothermal field is successfully representing the heat and mass flow within the system.

One of the causes of the high infant mortality rate in Indonesia is the lack of health support facilities in remote areas, including incubators, to keep the baby's body warm at a specific temperature. This research develops a model and prototype of a mobile incubator to carry and maintain the baby's temperature during emergencies to get further treatment to hospitals that have better facilities than incomplete health clinic facilities. The mobile incubator prototype uses a PID controller system with the optimum gain value Kp 1.501, Ki 0.016, and Kd -1,319 from the results of modeling and tuning in Matlab. The results of the bode plot analysis show that system stability was achieved with a gain margin of 109 dB. The incubator's operational mobility can last up to 59.6 minutes with two 12 V, 5 Ah batteries.

A method of non-destructively moisture content measurement of coffee beans is using near infrared spectroscopy (NIRS) which in general can be applied to determine chemical content of various organic materials. However, the commercial NIR instrument can not measure many samples in a single time, consequently the faster measurement can not be realized. The purposes of this research was to study the performance of modified NIR instrument prototype for measuring the moisture content of Java Preanger coffee beans. Performance study of modified NIR instrument was carried out on 50 coffee bean samples for determination of sample moisture content. The reflectance spectra of samples were measured bymodified NIRS instrument and then water content of samples was determined by oven method. The spectra data and water content were calibrated by multiple linier regression method to find the best calibration model. The result of this research show that number of wavelengths chosen to predict the moisture contentof Java Preanger coffee bean accurately is 17 wavelengths. The correlation coefficient (R) moisture content based on NIRS instrument and oven method was 0.902, this suggest that the model is able to explain 90.2% the diversity of existing data. The value of standard error calibration (SEC) and standard error prediction (SEP)was almost zero meaning that the error of prediction is low. This study also reveal that the value of residual predictive deviation (RPD) is 2.32, which means the prediction model for determination of Java Preanger coffee beans moisture content is good enough.

Selain itu, JTEP juga telah terdaftar pada Crossref dan telah memiliki Digital Object Identifier (DOI) dan telah terindeks pada ISJD, IPI, Google Scholar dan DOAJ. JTEP terbit tiga kali setahun yaitu bulan April, Agustus dan Desember, berisi 15 naskah untuk setiap nomornya baik dalam edisi cetak maupun edisi online. Mulai edisi ini ada perubahan dan penambahan anggota Dewan Redaksi jurnal berdasarkan SK Nomor 01/ KEP/KP/I/2019 yang dimaksudkan untuk meningkatkan pelayanan dan pengelolaan naskah sehingga penerbitannya tepat waktu. Jurnal berkala ilmiah ini berkiprah dalam pengembangan ilmu keteknikan untuk pertanian tropika dan lingkungan hayati. Penulis makalah tidak dibatasi pada anggota PERTETA tetapi terbuka bagi masyarakat umum. Lingkup makalah, antara lain meliputi teknik sumberdaya lahan dan air, alat dan mesin budidaya pertanian, lingkungan dan bangunan pertanian, energi alternatif dan elektrifikasi, ergonomika dan elektronika pertanian, teknik pengolahan pangan dan hasil pertanian, manajemen dan sistem informasi pertanian. Makalah dikelompokkan dalam invited paper yang menyajikan isu aktual nasional dan internasional, review perkembangan penelitian, atau penerapan ilmu dan teknologi, technical paper hasil penelitian, penerapan, atau diseminasi, serta research methodology berkaitan pengembangan modul, metode, prosedur, program aplikasi, dan lain sebagainya. Penulisan naskah harus mengikuti panduan penulisan seperti tercantum pada website dan naskah dikirim secara elektronik (online submission) melalui http://journal.ipb.ac.id/index.php/jtep.