One effort to increase dissolved oxygen concentration in pond waters is by applying bottom aeration system. The number of aeration point in the pond bottom allegedly affects oxygen solubility and shrimp farming performance. This study utilized two concreted ponds of 1000 m 2 each equipped with two bottom aeration systems built by 100 cm long of rubber diffuser, totaling 140 pieces (Treatment A) and 70 pieces (Treatment B). The PL-9 of L. vannamei were stocked with density of 600 ind/m 2 and reared for 70 days. Treatment A resulted dissolved oxygen of 3.04-10.36 (6.60±1.07) mg/L which were higher than Treatment B where the range of dissolved oxygen were 2.77-7.92 (6.08±0.95) mg/L. In contrast, nitrite, total nitrogen, phosphate and dissolved organic matter were lower within treatment A. Shrimp production, survival rate and feed conversion ratio in Treatment A were5, 620 kg, 93.6% and 1.12, respectively; whereas in treatment B were 4,000 kg, 80.7% and 1.51. Treatment A resulted in a better the L. vannamei farming compared to treatment B. To increase the supply of dissolved oxygen in the pond, a rubber diffuser can be used which is connected to a blower. ABSTRAKSalah satu upaya untuk meningkatkan oksigen terlarut di perairan tambak dapat dilakukan melalui sistem aerasi dasar. Jumlah titik aerasi dasar diduga mempengaruhi kelarutan oksigen dan berdampak pada performa budidaya udang di tambak. Penelitian ini menggunakan dua petak tambak beton masing-masing 1.000 m 2 dilengkapi dengan sistem aerasi dasar yang terbuat dari rubber diffuser sepanjang 100 cm, berjumlah 140 buah (Perlakuan A) dan 70 buah (Perlakuan B). Benur udang vaname PL-9 ditebar dengan padat penebaran 600 ekor/m 2 dan dipelihara selama 70 hari. Perlakuan A menghasilkan kelarutan oksigen 3,04-10,36 (6,60±1,07) mg/L lebih tinggi dibandingkan perlakuan B dengan kisaran oksigen terlarut 2,77-7,92 (6,08±0,95) mg/L. Sebaliknya parameter nitrit, total nitrogen, phosphat dan bahan organik terlarut lebih rendah di perlakuan A. Produksi, sintasan, dan rasio konversi pakan pada perlakuan A masing-masing 5.620 kg, 93,6% dan 1,12 dan perlakuan B masing-masing 4.000 kg, 80,7% dan 1,51. Perlakuan A menghasilkan performa budidaya lebih baik dibandingkan perlakuan B. Untuk meningkatkan pasokan oksigen terlarut di tambak dapat digunakan rubber diffuser yang dihubungkan dengan blower.Kata kunci: rubber diffuser, aerasi dasar, udang vaname

Background: The act of worshipping in mosque is often not only considered to be one of the factors causing the transmission of coronavirus disease 2019 (covid-19), but also a contributing factor to health protocol violations. Against this backdrop, the purpose of this paper is to examine the application of the Islamic principle of ḥifẓ alnafs (protection of life) in the practice of worshipping at the Nurul Iman mosque as it relates to the prevention of transmission of covid-19. Methods: This research uses a sociology of law perspective to the connection and the dynamics between the adoption of the principle of ḥifẓ al-nafs and the implementation of worship at the Nurul Iman mosque. As a case study, the data collection technique used includes interviews, observation, documentation reviews, and triangulation techniques, while the analysis technique used content analysis techniques. Results: The application of the principle of ḥifẓ al-nafs (protection of life) in the practices of worship at the Nurul Iman mosque have proven to be in accordance with health protocols and at the same time all members of the mosque congregation have been free from the transmission of covid-19. From an Islamic needs framework perspective, in the context of Covid-19 pandemic, the application of the ḥifẓ al-nafs principle at this mosque is a considered primary necessity (ḍar uriyy at) in that it protects life while providing spiritual continuity of collective religious worshipping, hence integrating the community together within a health and sanctity of life paradigm during this challenging time. Equally important, this research also challenges the thesis of the direct linkage between worshipping in mosque and Covid-19 transmission. Conclusion: the application of the principle of ḥifẓ al-nafs in the practices of worship in mosque has demonstrably shown that the congragants levels of health consciousness has increased and that they have also been kept safe. In essence, the effective contextualization of Islamic principle is able to provide the twin benefits of health and spirituality.

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Oil palm is an industrial plantation that is useful as a producer of cooking oil, industrial oil, and fuel. This research was conducted in West Sulawesi, Indonesia on June to September 2020. The purpose of this study was to determine oil palm, to calculate contribution of non-oil palm and non-farming household and contribution of oil palm plantations to farmers' income. Sampling for respondent in this study was carried by simple random sampling to the oil palm farmers in the study location.  This study conducted at one of oil palm location center in Central Mamuju Regency, West Sulawesi by using questionnaires. The first results showed that oil palm is very profitable with an average income of IDR 30,666,620 per hectare per year. The second, source of household income for farmers is obtained from oil palm farming, non-oil palm farming and non-farming activities with an average total household income of the oil palm farmers of IDR 46,363,655 per year. The third, the contribution of oil palm plantations to farmers' income is moderate around 66 percent as a medium category.

Penulis bertujuan untuk mendeskripsikan buku Kaidah Kesahihan Sanad Hadis yang ditulis oleh Syuhudi Ismail, salah seorang tokoh hadis terkemuka di Makassar. Penulis menggunakan metode kajian pustaka (library research), sehingga apa yang terdapat dalam tulisan ini berdasarkan atas buku Kaidah kesahihan sanad hadis yang di tulis oleh Syuhudi Ismail yang digunakan oleh penulis sebagai rujujkan untuk menganalisa buku tersebut. Selanjutnya hasil dari kajian tersebut adalah (1) pemikiran Syuhudi Ismail, sebagai seorang ahli hadis yaitu dapat di golongkan sebagai salah seorang pemikir dan kritikus hadis yang bersifat moderat karena ia bersikap obyektif menyikapi periwayat hadis yang diperselisihkan tanpa terikat pada salah satu kaidah jarh wa ta’dil yang ekstrim, mendahulukan Jarh ataukah Ta’dil bagi periwayat yang diperselisihi kualitasnya, (2) Adapun metodologi penyusunan dan pembahasan buku Kaedah Kesahihan Sanad Hadis menggunakan pendekatan Ilmu Sejarah yang merupakan hasil penelitian desertasi Syuhudi merupakan buku hadis pertama yang mengklasifikasikan kesahihan sanad hadis kedalam kaidah mayor dan minor