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PENGELOLAAN SEDIMEN KALI GENDOL PASCA ERUPSI MERAPI JUNI 2006 Rahmat, Ali; Legono, Djoko; Kusumosubroto, Haryono
Civil Engineering Forum Teknik Sipil Vol 18, No 2 (2008): MEI 2008
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

The Gendol River, with its catchment area of 66 km2 and the river length of about 22 km, originates from the south east of Mount Merapi. Nineteen sabo dams have been built in order to anticipate and control sediment disaster. The most upstream dam is Kaliadem (+1.100 msl) and the most downstream dam is consolidation dam of GE-C0 (+163 msl). Sand mining occurs at several points along the river and cause environmental damage. In order to conserve environment and to maintain sediment balance a proper sediment management is required. The research is conducted based on sediment balance. The analysis of transportable sediment volume (VS) is conducted using empirical formula of Takahashi (1991) and Mizuyama (1977). Over flow sediment volume (VE) was analyzed using empirical equation of Shimoda (1995). Sediment balance was analyzed based on maximum daily rainfall (R24) with 25 years return period. The result of the study shows that the sabo system in Gendol River effectively works to control lahar flow. As a conclusion, the existing sabo dams are able to maintain sediment balance in Gendol River. The possible amount of sand mining is estimated about 1.253.422 m3 and the allowable daily sand mining volume is estimated about 836 m3 per day.
SIMPLE ESTIMATION AIR TEMPERATURE FROM MODIS LST IN GIFU CITY, JAPAN Rahmat, Ali
Journal of Science and Applicative Technology Vol 1 No 1 (2017): Journal of Science and Applicative Technology August Chapter
Publisher : Lembaga Penelitian, Pengabdian Masyarakat, dan Penjaminan Mutu (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1009.19 KB) | DOI: 10.35472/281480

Abstract

In the developing country or poor country difficult to access meteorological data such as air temperature, it's caused by the limitation of equipment or funding. Air temperature is one of the meteorological data commonly used to predict evaporation or to understanding climatic condition in a specific location. Nowadays from satellite data can estimate some meteorological data. But the detail of explanations about how to get and how to use satellite data is limited and difficult to adopt for beginners. This paper explains how to get MODIS LST data to estimate air temperature data study case in Gifu City, Japan. The results show data from MODIS LST is higher than data from the local meteorological station for day time and lower for night time, but still can use because the pattern is similar. Mean of maximum air temperature and minimum air temperature can be used as daily average air temperature. MOD11A2 product data was better than MYD11A2 data to predict air temperature. MODIS LST data can be used for untouched areas like desert or forest.
Normalized Difference Vegetation Index in the Integration of Conservation Education Rahmat, Ali; Hamid, Mustofa Abi; Zaki, Muhammad Khoiru; Mutolib, Abdul
Indonesian Journal of Science and Technology Vol 3, No 1 (2018): IJoST: Volume 3, Issue 1, 2018
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v3i1.10798

Abstract

Forest plays an important role to support a global environment. Currently, forest degradation occurs in developing countries. Therefore, the excellent strategies to against the forest degradation must be found. One of the best solutions is understanding the information of vegetation condition. Here, the objective of this paper was to apply a method as the assessment of vegetation monitoring using satellite data in the integration of conservation education forest at great forest Wan Abdul Rachman in Lampung Province, Indonesia. In this study, normalized difference vegetation index (NDVI) was used, completed with satellite data (namely MODIS). This technique helps in monitoring vegetation status. Data NDVI from MODIS satellite data showed that forest area decrease very small from 2000-2017. The data was obtained for June, July, and the end of September.
Comparison Air Temperature under Global Climate Change Issue in Gifu city and Ogaki city, Japan Rahmat, Ali; Mutolib, Abdul
Indonesian Journal of Science and Technology Vol 1, No 1 (2016): IJoST: Volume 1, Issue 1, 2016
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v1i1.2212

Abstract

Increases in air temperature indicate a global climate change. Thus, information in the change of temperature regional scale is important to support global data. The present research was conducted in Gifu city and Ogaki city located in Gifu prefecture, Japan. The results showed that, average air temperatures in both cities are quite similar with a difference value of under 1oC. Maximum air temperature in Gifu city is significantly higher than Ogaki city, whereas minimum air temperature in Gifu city is significantly lower than in Ogaki city. Daily range of air temperature in Gifu city significantly higher than in Ogaki city. In both cities, air temperature relatively increased in three decades. This is because of different in land characteristics in both cities.
Relationship of Soil Physicochemical Properties and Existence of Phytophthora sp. in Pineapple Plantations Martin, Deva Aziz Nanda; Rahmat, Ali
Indonesian Journal of Science and Technology Vol 2, No 1 (2017): IJoST: Volume 2, Issue 1, 2017
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v2i1.5991

Abstract

One of the tropical fruits with high economic value is pineapple. Pineapple plantation has several limitations, especially in cultivating period and diseases caused by Phytophthora sp. (called heart rot disease). The spread of Phytophthora sp. in pineapple plantation is influenced by physical of soil (called as soil borne pathogen). Here, the purpose of this study was to examine physical properties of soil (compaction), specifically on heart rot disease in pineapple plantation. We used pineaple farm locating in Central Lampung, Indonesia. In this paper, we analyzed the disease impact from the soil compaction point of view. We investigated the difference between soil samples with and without sick plant. The results showed that the disease area were affected by Phytophthora sp. area have high soil compaction. Indeed, this soil condition is good for growing Phytophthora sp.
IMPLEMENTASI MEDIA PEMBELAJARAN DALAM MENGEMBANGKAN KOGNITIF ANAK DI RA AL-MANAR LENTENG SUMENEP Rahmat, Ali
Jurnal Kariman Vol 5 No 1 (2017): Pendidikan dan Keislaman
Publisher : STIT AL-KARIMIYYAH

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Abstract

Hasil penelitian ini menunjukkan bahwa penggunaan media pembelajaran bagi anak di RA Al-Manar dapat mempermudah dalam mencerna materi pelajaran sehingga kapasitas koginif anak dapat berkembang. Penggunaan media pembelajaran untuk anak usia dini sangat membantu dalam memberikan pemahaman terhadap materi pelajaran yang diberikan oleh guru. Adapun cara menerapkan media pembelajaran ialah dengan mengadakan tanya jawab kepada anak, percakapan, penugasan dan kemudian melihat hasil yang telah dicapai oleh anak kemudian memberikan penilaian. Adapun kendala yang dapat menghambat efektifitas penggunaan media pembelajaran ialah bagi guru itu sendiri seperti: guru kesulitan dalam mempersiapkan media untuk suatu pembelajaran, butuh waktu lama untuk menyiapkan media, serta mengeluarkan biaya yang banyak pula. Sementara kendala bagi anak itu sendiri ialah kurangnya media yang difasilitasi oleh guru, kurang efektifnya media yang digunakannya, dan sulitnya anak dalam menggunakan media pembelajaran.
PENGARUH IRIGASI DAN MULSA ORGANIK TERHADAP PERTUMBUHAN TANAMAN NANAS (Ananas comosus) DI DAERAH TROPIKA BASAH Rahmat, Ali; Afandi, Afandi; Manik, Tumiar K.B.; Cahyono, Priyo
Jurnal Agrotek Tropika Vol 2, No 1 (2014)
Publisher : Departement of Agrotechnology, Agriculture Faculty, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (60.409 KB) | DOI: 10.23960/jat.v2i1.1978

Abstract

Irigasi pada tanaman nanas sangat penting karena mempengaruhi pertumbuhan dan produksi terutama di daerah tropika basah, namun biaya untuk irigasi sangat mahal. Penelitian bertujuan untuk mengetahui pengaruh irigasi dan mulsa organik terhadap pertumbuhan tanaman nanas di daerah tropika basah. Penelitian dilakukan dengan rancangan perlakuan faktorial (5 x 2) dalam rancangan acak kelompok dengan 3 kali ulangan. Faktor pertama adalah lama irigasi (I) yang terdiri dari 5 lama irigasi yaitu tanpa irigasi (I0), diirigasi 1 bulan (I1), diirigasi 2 bulan (I2), diirigasi 3 bulan (I3), dan diirigasi 4 bulan (I4). Faktor yang kedua adalah dosis mulsa kulit singkong terdiri dari 2 taraf yaitu 0 t ha-1 (M0) dan 50 t ha-1 (M1). Data pertumbuhan tanaman dianalisis ragam dan dilanjutkan dengan uji BNT pada taraf 5%. Tinggi tanaman 6 BST perlakuan yang irigasi 4 bulan bermulsa dan tidak bermulsa tidak berbeda nyata, dengan tinggi tanaman tertinggi pada perlakuan I4M1 yaitu 80,39 cm. Berat basah tanaman 4 BST yang irigasi 4 bulan bermulsa, irigasi 4 bulan tanpa mulsa dan irigasi 3 bulan bermulsa tidak berbeda nyata. Terjadi pemulihan keragaan tanaman terutama berat basah setelah memasuki musim hujan dimana kadar air tanah maksimum.
KONSEP MANUSIA PERSPEKTIF FILOSOF MUSLIM Rahmat, Ali
Jurnal Kariman Vol 4 No 2 (2016): Pendidikan dan Keislaman
Publisher : STIT AL-KARIMIYYAH

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Abstract

Kajian tentang konsep manusia kali ini hanya dibatasi pada konsep manusia perspektif Ibn Sina dan al-Ghazali. Ibn Sina mengemukakan bahwa hakikat dari manusia terdiri dari dua unsur yaitu:  jasad dan nafs. Dua unsur ini memiliki perbedaan antara jasad dan nafs yang terdapat pada hewan dan tumbuhan. Kehadiran nafs dalam jasad sebagai penjelmaan baginya. Jasad merupakan alat bagi nafs. Selain itu, terdapat pula hubungan yang kuat antara jasad dan nafs. Nafs tidak akan mencapai tahap fenomenal tanpa adanya jasad. Sedangkan menurut al-Ghaza<li menyatakan bahwa hakikat manusia terdiri dari beberapa unsur, seperti: al-nafs, al-ru<h, al-qalb, dan al-‘aql. Keempat unsur ini memiliki fungsi dan peran masing-masing, namun keempatnya saling melengkapi dalam membentuk manusia yang berkepribadian Insan Kamil. Perbedaan potensi yang dimiliki oleh manusia inilah yang menjadikan manusia itu merupakan makhluk termulia di sisi Allah SWT. Tujuan Hidup Manusia ialah tercapainya kebahagiaan. Sedangkan tujuan akhirnya ialah tercapainya kebahagiaan akhirat yang puncaknya yaitu dekat dengan Allah SWT. Adapun relevansi antara pemikiran Ibn Sina dengan al-Ghazali terdapat pada dimensi nafs. Bagi Ibn Sina nafs manusia itu satu, akan tetapi berbeda dengan nafs perspektif al-Ghazali. Menurut al-Ghazali nafs itu terdiri dari nafs ammarah, mutmainnah, dan nafs lawwamah. Adapun yang menjadi hakikat manusia dalam nafs ini ialah nafs mutmainnah. Kemudian dilengkapi oleh al-Ghazali dengan dimensi lainnya,seperti: ruh, hati, dan akal.
Removal of Methylene Blue by Adsorption onto Activated Carbon From Coconut Shell (Cocous Nucifera L.) Khuluk, Rifki Husnul; Rahmat, Ali; Buhani, Buhani; Suharso, Suharso
Indonesian Journal of Science and Technology Vol 4, No 2 (2019): IJOST: VOLUME 4, ISSUE 2, 2019
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v4i2.18179

Abstract

This research has been conducted on process of production activated carbon from coconut shells, which are activated both physics and chemistry to improve the adsorption of methylene blue. The process of physical activation was done by burning the coconut shell using a furnace at a temperature of 700°C. The chemical activation was done using H3PO4 activator. The result of activated carbon physical activation (CAP) has a greater absorbency than activated carbon chemical activation (CAC) with each of the absorption of methylene blue at 99.42 and 98.64%. Analysis of surface morphology on the adsorbent was performed using a Scanning Electron Microscope (SEM). SEM results indicated that (CAP) has a surface morphology that is relatively similar to commercial activated carbon (CACm). Adsorption test was conducted on the determination of the optimum pH, adsorption rate, and isotherm adsorption of methylene blue. The results of the optimum pH on CAC, CAP, and CACm respectively obtained at pH 8 and the optimum contact time is obtained respectively at 40, 60, and 80 minutes. Adsorption kinetics data of methylene blue on CACm, CAP, and CAC tend to follow the pseudo second order kinetics with a correlation coefficient (R2) is 0.937; 0.950; and 0.999, respectively. Adsorption isotherm of methylene blue on CACm, CAP, and CAC tend to follow the model of Freundlich isotherms.
Utilization of Stem Bark and Leaves of Kluwih (Artocarpus Altilis Park) as an Anti-Mosquito Repellent: A Case Study of Total Mosquito Mortality (Anopheles Sp) Kurniawan, Betta; Puspita, Laila; Kurnia, Yogi; Husna, Ismalia; Rahmat, Ali; Umam, Rofiqul; Andriana, Bibin B.; Jermsittiparsert, Kittisak
Indonesian Journal of Science and Technology Vol 5, No 3 (2020): IJOST: VOLUME 5, ISSUE 3, 2020
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v5i3.25370

Abstract

The purpose of this study was to demonstrate an alternative solution as an insecticide from Indonesian natural ingredients. We investigated the potential use of Artocarpus altilis park (known as kluwih plants in Indonesia) for an anti-mosquito repellent because it contains flavonoids and saponins. The use of this type of insecticide is harmless, inexpensive, and largely available in Indonesia. In the experiment, we extracted bark and leaves of kluwih to obtain insecticidal material to repel Anopheles sp. To ensure the precise extraction and insecticidial effect, the experiments were conducted four times with three repetitions. For each experiment, we used 8.4 mL with the concentrations of 20, 30, and 40% of flavonoid. The results showed that the higher the concentrations of bark and leaf extracts of Artocarpus altilis park the higher the mortality rate of Anopheles sp is.