ABSTRAKKondisi kualitas air suatu perairan yang baik sangat penting untuk mendukung kelulushidupan organisme yang hidup di dalamnya. Penentuan status mutu air perlu dilakukan sebagai acuan dalam melakukan pemantauan pencemaran kualitas air. Penelitian ini bertujuan untuk mengkaji status mutu air dan menentukan indeks pencemaran berdasarkan parameter fisika-kimia di perairan Distrik Depapre, Kabupaten Jayapura. Pengambilan sampel kualitas air dilakukan pada bulan Oktober 2017 di lima stasiun penelitian, kemudian hasilnya dibandingkan dengan baku mutu air laut untuk biota laut berdasarkan KEPMEN-LH No. 51 Tahun 2004. Hasil penelitian menunjukkan bahwa parameter yang masih sesuai baku mutu antara lain suhu, salinitas, sulfida dan kecerahan perairan, sedangkan parameter yang telah melampaui baku mutu antara lain pH, ammonia total, nitrat dan fosfat. Berdasarkan hasil perhitungan indeks pencemaran menunjukkan bahwa perairan Distrik Depapre berada dalam kategori tercemar ringan hingga tercemar sedang. ABSTRACTGood water quality is extremely important to support life of organisms. The determination of water quality status was needed as reference to monitor water pollution. This study aimed to assess the status of water quality and determine pollution index based on physical-chemical parameters in the Depapre District waters, Jayapura Regency. Sampling was carried out in October 2017 across five research stations, then the results were compared with water quality standards based on KEPMEN-LH No. 51 Tahun 2004 for marine biotas. The results showed that the parameters in according to the quality standards are temperature, salinity, sulphide and water transparency, while those that have exceeded the quality standards are pH, total ammonia, nitrate and phosphate. Based on the calculation of pollution index indicates that the Depapre District waters was in light pollution to medium categories.

The determination of water quality status was needed as a reference to monitor water pollution. The purpose of this study was to determine the concentration of ammonia, nitrate, and phosphate in Depapre waters, Jayapura Regency. Sampling was carried out in October 2017 across five research stations, then the results were compared with water quality standards based on KEPMEN-LH No. 51 Tahun 2004 for marine biotas. Based on the analysis of water quality in Depapre waters obtained the following results are the ammonia content ranges from 0.8 to 11.6 mg/L, the content of nitrate ranged from 0.009 to 0.54 mg/L, and the phosphate content ranged from 0.016 to 1.19 mg/L. These results indicate that the ammonia, nitrate and phosphate concentration in Depapre Waters have exceeded the water quality standard. The concentration of ammonia, nitrate, and phosphate is high enough and endanger the lives of marine biotas.

Pengairan atau irigasi merupakan faktor penting dalam industri pertanian dan perkebunan. Ancaman serius yang dihadapi industri tersebut adalah semakin menurunnya ketersediaan air. Oleh karena itu dibutuhkan upaya pengelolaan air secara tepat khususnya dalam irigasi. Air yang digunakan untuk irigasi secara konvensional tidak efsien karena memerlukan banyak air dan tidak sesuai kebutuhan. Selain itu, irigasi konvensional memerlukan waktu yang tidak sedikit hanya untuk mengairi tanaman sehingga tidak efektif untuk lahan yang banyak dan relatif luas. Untuk itu maka diperlukan teknologi yang secara otomatis melakukan pengairan yang efektif dan efisien. Wireless Sensor Network (WSN) merupakan suatu sistem komunikasi data nirkabel yang terdiri dari beberapa node yang ditempatkan di area tertentu. WSN ini diimplementasikan ke dalam sistem irigasi otomatis ini untuk memudahan komunikasi data dengan jarak yang jauh. Sistem ini menggunakan sensor Higrometer YL-69, untuk komunikasi wireless menggunakan NRF24L01+, prosessor menggunakan arduino untuk node dan router, dan raspberry pi pada server. Hasil percobaan menunjukkan bahwa NRF24L01+ dapat berkomunikasi antar modul dengan baik pada jarak 35 meter. Frekuensi pada radio yang digunakan sebesar 2.4 GHz dengan kecepatan 2Mbps. Pengaturan delay optimal pada komunikasi pada wireless sensor network menggunakan NRF24L01+ adalah 500 ms. Pengaturan irigasi dengan menggunakan kontrol fuzzy didapatkan kesalahan rata-rata terhadap titik acuan sebesar 11%.

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In a power plant such as micro-hydropower (MHP), an induction generator (IG) is usually employed to produce electrical power. Therefore, an inverter is needed to deliver it with high efficiency. Z-source inverter (ZSI) has been introduced as a topology with many advantages over conventional inverters. This research aims to investigate the performance of ZSI based simple boost control (SBC) in laboratory-scale MHP systems using a rewinding induction generator. This research has been conducted both from simulations and experiments. Based on the result, the waveform characteristic and value of ZSI are close to the desired design. A shoot-through duty ratio of 17% can reach 60 Vrms output voltage, and this condition has a conversion ratio of about 2.05 times. Also, SBC can significantly reduce the Total Harmonic Distortion (THD). ZSI efficiency has a value of 84.78% at 50% of rating load 100 W and an average value of 80%. Compared to the previous study, the proposed design has more economical with the same component for the higher rating power. Moreover, it has a smoother and entire output waveform of the voltage.

Most gases are odorless, colorless and also hazard to be sensed by the human olfactory system. Hence, an electronic nose system is required for the gas classification process. This study presents the design of electronic nose system using a combination of Gas Chromatography Column and a Surface Acoustic Wave (SAW). The Gas Chromatography Column is a technique based on the compound partition at a certain temperature. Whereas, the SAW sensor works based on the resonant frequency change. In this study, gas samples including methanol, acetonitrile, and benzene are used for system performance measurement. Each gas sample generates a specific acoustic signal data in the form of a frequency change recorded by the SAW sensor. Then, the acoustic signal data is analyzed to obtain the acoustic features, i.e. the peak amplitude, the negative slope, the positive slope, and the length. The Support Vector Machine (SVM) method using the acoustic feature as its input parameters are applied to classify the gas sample. Radial Basis Function is used to build the optimal hyperplane model which devided into two processes i.e., the training process and the external validation process. According to the result performance, the training process has the accuracy of 98.7% and the external validation process has the accuracy of 93.3%. Our electronic nose system has the average sensitivity of 51.43 Hz/mL to sense the gas samples.

Abstract: Abstract: This paper reveals the tradition of Javanese people on handling the death. Javanese muslims is understood in a framework of great and little tradition and the meaning in death tradition. Those items when it is revealed and understood practically seems to have a shift. The variation in death tradition because of the distance and the evolution. There are some important highlights; first, Javanese Muslims in understanding and doing the death ritual based on a strong basic as an honour for those who alive and as a symbolic dimension with other nature. Second, Javanese Muslims know that death is a way to go back to Allah so that the everybody should be in a purified condition and still has a belief that Allah is the only one to be worshiped. The people believe that Allah is the Most Forgiving so that Muslims should pray for all the mistakes and bad deed. Abstrak A. PENDAHULUANJawa apabila dipandang dari suku maupun dari pola kehidupannya memiliki akar pengetahuan yang seolah tidak pernah habis untuk digali. Berbagai macam filosofi dari pewayangan, keyakinan, kepercayaan, tradisi, adat maupun praktik-praktik lain selalu memiliki ciri dan sudut pandang yang luhur. Hakikat kemanusiaan ini dipahami sebagai tata cara dalam hidup yang mewujud bersama komponen kebijaksanaan sejak zaman leluhur. Dimensi ini memandang hidup yang dilimpahi berkah oleh suatu kekuatan yang menopang manusia.Nilai-nilai Jawa makin kental ketika bersentuhan dengan Islam sebagai agama rah} matan lil 'a> lami> n. Jawa pun akhirnya membentuk sejarah peradaban, dengan akulturasi budaya dan nilai-nilai yang bersatu-padu. Terlebih lagi, konsep ajaran dari Sunan Kalijaga yang terus menghidupkan nilai-nilai luhur dan melakukan pendekatan dengan cara tasawuf. Oleh karena itulah, Islam di Jawa memiliki karakter khas. Ini tampak pada: 1) varian amalan (ritual) nya, 2) pemaknaan muslim Jawa terhadap amalan (ritual). Hasil penelitian Woodward dan Salim HS (2004: 15), Mçler (2005: 7), Solikhin (2010), dan Ahyani (2012), menjadi salah satu bukti ilmiah dari karakter khas Islam Jawa tersebut yang berusaha mengeksplorasi dimensi batin dan struktur sosial secara seimbang. Faktanya, memang Jawa memiliki konsep-konsep keberhidupan terkait dengan dimensi transobjektif.Dalam buku Rites of Passage, Van Gennep mengungkapkan bahwa masyarakat memiliki tradisi/ritus unik terkait dengan daur hidup mereka, mulai dari lahir, kanak-kanak, remaja, nikah, hingga kematian (Van Gennep, 2006: 203). Dalam konteks ini, bahwa ritual di seputar kematian seseorang di Jawa juga menjadi salah satu tradisi yang unik. Ritus ini dilakukan dengan dasar dan argumentasi yang jelas sehingga menjadi keyakinan di kalangan masyarakat, baik secara normatif (agama) maupun secara sosiologis.Di Jawa, tradisi di seputar kematian Wong Islam Jawa dilakukan dengan dengan cara yang unik, khas, dan seringkali berbeda antara satu tempat dengan tempat lain. Pada dasarnya, memang Wong Islam Jawa membentuk keyakinan dalam spiritualitas atas pengalaman batin. Oleh ...

Environmental Ethics of Sufism Cosmology in View of Seyeed Hossein Nasr. Sufism has unique concepts about human life. It provides the ways and methods to find the highest conscious so that the sâlikîn (the followers of sufism) can be wiser than before in any aspects, including in facing ecological crisis issues. This article tried to explore and analyze Seyeed Hossein Nars’s view on ecological ethics in sufism. Nasr’s concept derived from tawhîd (unity). Macro and micro cosmos were God’s theophany. The relation between Allah as The God and cosmos were like one face at the front of thousand mirrors. Allah is The One and there are many manifestations of his reflection. Therefore, the universe contains and accommodates the “aspects” of God. Hence, Nasr developed the concept of tawhîd became rim and axis theory. In this theory, there are similarities and likenesses with a’yan’s Mulla Sadra and al-Ghazali views. Through bashîrah (the eyes of heart), the sâlik can be khalîfah and ‘abd Allâh. Hence, damaging the cosmos also means damaging the relation with Allah.