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Keanekaragaman Kupu-Kupu di Kawasan Gunong Bonsu Kabupaten Rokan Hulu, Provinsi Riau BIBAS, ELPE; MUHAMMAD, AHMAD; SALBIAH, DESITA
Jurnal Riau Biologia Vol 1, No 1 (2016)
Publisher : Jurusan Biologi FMIPA Universitas Riau

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Abstract

This study concerned the species diversity and abundance of butterflies in Gunong Bonsu, an area situatedin Rokan Hulu District, Riau Province. Sampling was conducted within the period of Januari-April 2015in four different habitat types, i.e. secondary forest, rubber jungle, palm oil plantation and tour sites. Twostandardized sampling methods were combined, i.e. sweeping and trapping using fruit bait along transect(100 m-long fixed transect in each selected site). A total of 1641 individuals were captured with 189butterflies species were identified, including 14 species of Papilionidae, 105 species of Nymphalidae, 19species of Pieridae, 14 species of Lycaenidae, and 19 species of Hesperiidae. Among these species, onlyTroides amphrysus (birdwing butterfly) which is protected by the law at national as well as internationallevel. The species diversity index for Gunong Bonsu area is very high (H’= 4,53).Keywords: abundance, butterflies, species diversity index
Sebaran dan Kelimpahan Lipas Kayu (Panesthia angustipennis angustipennis) di Bawah Tegakan Akasia (Acacia crassicarpa) dan Hutan Alam pada Lahan Gambut NURARIFIN, IRFAN; MUHAMMAD, AHMAD; SALBIAH, DESITA
Jurnal Riau Biologia Vol 1, No 1 (2016)
Publisher : Jurusan Biologi FMIPA Universitas Riau

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Abstract

Residual wood under acacia (Acacia crassicarpa) plantation forest on peatland harbors diverse insects,among which is the wood-feeding cockroaches (Panesthia angustipennis angustipennis. Blaberidae,Blattodea). This insect appears to enhance nutrient cycling through consumption and maceration ofdecaying wood. The purpose of this study was to assess the distribution and abundance of this insect inthis pulpwood plantation and nearby natural forest remnants. Sampling has been done in plantationblocks representing <1, 2-3 and 5-6 year-old stands and also in natural forest. Results showed that woodfeedingcockroaches was most frequently found (80,0 %) in 2 year-old acacia stand, whereas it was leastfrequently encountered in natural forest. Likewise, it was most abundant (9,500 individuals/ha or 0.95individuals/m2) in the former, while it was least abundant (2,500 individuals/ha or 0.25 individuals/m2) inthe latter. In general, the insect was more abundant in the plantation forest than in natural forest.Key words: Pulpwood plantation forest, residual wood, wood-feeding cockroaches .
Relasi Sufisme dengan Modernitas dalam Perspektif ‘Abd al-Ḥalîm Maḥmûd Muhammad, Ahmad
TEOSOFI: Jurnal Tasawuf dan Pemikiran Islam Vol. 4 No. 1 (2014): June
Publisher : Program Studi Filsafat Agama Fakultas Ushuluddin dan Filsafat UIN Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (621.168 KB) | DOI: 10.15642/teosofi.2014.4.1.88-118

Abstract

This article discusses the theme of Sufism, modernity, and the relationship between the two. This study concludes that according to Mahmûd, Sufism can deliver the people towards the true knowledge. In order to obtain this knowledge, the method of ittibâ? to al-Qur?ân and Sunnah is used. The method is implemented through purification of the soul. This method differs from the two methods used in modernity, namely the Cartesian philosophical method and Baconian observation method. The last two methods are only able to produce empirical-rational knowledge. According to Mahmûd, both methods are only appropriate when used in the context of physical science, not of metaphysics and moral issues. The last two issues are more appropriate when viewed from the perspective of Sufism, which is guided by revelation. Mahmûd argued that the relationship between Sufism and modernity is a complementary relationship, in which each of the two aspects is a complementary entity to another. It means that modernity will be spiritually empty without Sufism on one hand and Sufism will also be more meaningful when supported by modern science on the other.
Struktur Floristik Hutan di Kawasan Lindung Sempadan Sungai dalam Areal Hutan Tanaman Industri Qomar, Nurul; Bahdarsyah, Bahdarsyah; Nugroho, P Agung; Rohaini, Rahmi A; Muhammad, Ahmad
Jurnal Natur Indonesia Vol 10, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.10.1.24-30

Abstract

This study was carried out in riparian conservation forests within a monospecific pulpwood estate in Sorek,Pelalawan District, Riau. The remaining natural forests comprised lowland rainforest (at Sei Buluh and Tolamriversides), mixed swamp forest (at Telayap riverside), and pole forest (at Rangsang riverside). The objective of thecurrent study was to describe the floristic structure of each forest type at the conservation areas in concern.Fifteen transects (width of 20 m) were established at all sites with a total length of 8.080 m. Quadrates plots of 20x 20 m were established with continue on these transect for tree sampling (dbh > 20 cm) and smaller quadrates(10 x 10 m) were nested on each one of the former for pole sampling (dbh 10 – 20 cm). The parameters used in thisstudy were Importance Value (IV), species richness (Margalef Index = R1 and Menhinick Index = R2), and Diversity Index (Shannon = H’ and Simpson = D). Results showed that in tree stratum, the largest basal area (11.25 m2ha-1) and the highest diversity was found at Telayap’s riverside (H’ = 3.70 and D = 0.98). Species richness was most profound at Tolam riverside (R1 = 10.43 and R2 = 2.83). Rangsang’s riverside possessed the highest tree density (105 individuals ha-1) but with the smallest dbh (26.5 cm). This forest was a peat-swamp forest predominating by bintangur (Calophyllum pulcherimum). At the pole stratum, the largest basal area (7.00 m2ha-1) and the highest diversity was found at Tolam riverside (H’ = 3.39 and D = 0.96). Species richness was most profound at Telayap’s riverside (R1 = 8.89 and R2 = 2.64). The highest pole density (380 individuals ha-1) was observed at Sei Buluh’s riverside, in which mempening (Quercus lucida Roxb.) was predominating. Acacia mangium was establishing very well at all sites, indicating its adaptability and potentially invasive feature.
ANALISA JALUR KRITIS PADA PENJADWALAN PROYEK PENGEMBANGAN SISTEM INFORMASI MENGGUNAKAN TEKNIK CRITICAL PATH METHOD (CPM) (STUDI KASUS : PT. XYZ) Muhammad, Ahmad; Kurniawan, Bagus; Mufidah, Arnys Primaveria; Dai, La David Michael Bin La; Pakarbudi, Adib
Prosiding Seminar Nasional Sains dan Teknologi Terapan 2021: Peluang dan Tantangan Peningkatan Riset dan Teknologi di Era Pasca Covid-19
Publisher : Institut Teknologi Adhi Tama Surabaya

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Abstract

Kebutuhan Sistem Informasi yang meningkat telah memicu lahirnya penyedia jasa konsultan SI/TI. PT XYZ merupakan perusahaan jasa konsultan SI/TI yang berada di kota Surabaya. Saat ini PT. XYZ telah memiliki berbagai macam klien dan proyek SI/TI. Namun dibalik pencapaian tersebut PT XYZ masih memiliki kendala yang dapat mempengaruhi waktu pengerjaan proyek yang dimiliki. Hal ini diakibatkan kurangnya perencanaanoleh tim proyek PT. XYZ sehingga mengakibatkan munculnya keterlambatan dalam penyelesaian proyeknya. Dari permasalahan ini penulis mencoba mengusulkan untuk melakukan Analisa jalur kritis pada aktivitas proyek SI yang dimiliki menggunakan Teknik Critical Path Method (CPM). Hasil dari Analisa tersebut menunjukkan bahwa Teknik CPM dapat diterapkan dalam proyek pengembangan Sistem Informasi yang dilakukan oleh PT. XYZ. Teknik ini memungkinkan tim proyek PT. XYZ mengetahui aktivitas penting yang pe Penelitian ini juga menghasilkan temuan lain yang mengatakan bahwa durasi waktu juga dipengaruhi oleh jumlah anggota tim proyek, teknologi dan kerangka kerja yang digunakan dalam pengembangan sistem informasi.