Claim Missing Document
Check
Articles

PEMANFAATAN GIS (GEOGRAPHIC INFORMATION SYSTEM) PADA MANAJEMEN BUKA TUTUP PERLINTASAN KERETA API Yani Sugiyani; Dwi Bayu Rendra; Sulistiono Sulistiono
PROSISKO: Jurnal Pengembangan Riset dan Observasi Sistem Komputer Vol. 3 No. 1 (2016)
Publisher : Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (170.376 KB)

Abstract

Teknologi Informasi merupakan sebuah fasilitas yang dapat diterapkan disegala bidang. Salah satu contoh teknologi informasi yang sudah dirasakan manfaatnya adalah  GIS (Geographic Information System) sebagai pengolahan citra bagi pemetaan. Permasalahan gerbang perlintasan kereta Api sudah menjadi dilema bagi masyarakat dimana jadwal kedatangan kereta dengan penutupan gerbang perlintasan tidak sesuai sehingga sudah banyak korban yang meninggal dikarenakan ketidak sesuaian jadwal. Dengan memanfaatan teknologi GIS diharapkan masyarakat juga dapat mengetahui kedatangan kereta api sehingga kecelakaan dapat dihindari. Metode yang digunakan dengan pemanfaatan pencitraan peta kedatangan kereta api. Dengan menempatkan alat detector (alat pelacak) serupa navigasi maka akan terlacak kedatangan kereta api. Sehingga pada jarak kedatangan kereta api dapat di antisipasi waktu penutupan perlintasan kereta api. Selain untuk menghindari kecelakaan juga untuk menghindari kemacetan panjang di jalur perlintasan kereta api karena terlalu lamanya pintu perlintasan kereta api tertutup. Diharapkan dengan pemanfaatan GIS pada pintu perlintasan kereta Api, dapat meminimalisir kecelakaan dan kemacetan yang diakibatkan kurang antisipasinya kedatangan kereta Api
The Potential of Ecotourism Development in Water Reservation Area of Mahseer (Tor spp.) in Bungo Regency of Jambi, Indonesia Muhammad Atma Aditya; Fredinan Yulianda; Sulistiono Sulistiono
Journal of Indonesian Tourism and Development Studies Vol. 9 No. 3 (2021)
Publisher : Program Pascasarjana

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

River waters in Bungo Regency are the habitat of mahseer (Tor spp.), which has a potential for ecotourism development. This study aimed to examine the potential of mahseer resources as the main commodity in river ecotourism development. The study was conducted at the Lubuk Alay water reservation area in October 2019. Observations were made for water quality (temperature, depth, transparency, TSS, pH, DO, nitrate, and total phosphate) and general tourism conditions in the region. The analysis was carried out on the river tourism suitability index (TSI), carrying capacity, and management strategies. Based on the observations, the water quality was generally in good condition and suitable for ecotourism requirements. Types of suitable activities for river ecotourism consisted of relaxing sitting-in (TSI 2.08 – 2.45, suitable) with a carrying capacity of 149 persons/day and playing water (TSI 2.35 – 2.45, suitable) with a carrying capacity of 2194 person/day. The management strategies for developing river ecotourism covered the classification of zones in the Lubuk Beringin, ecotourism development in accordance with the existing potential, coordination between the government and public for ecotourism development, and development of ecotourism through improving facilities and infrastructure.Keywords: Carrying capacity, conservation, river ecotourism.
Keragaman ikan di Danau Cala, Kabupaten Musi Banyuasin Sumatera Selatan Jifi Abu Ammar; Mohammad Mukhlis Kamal; Sulistiono .
Depik Vol 3, No 3 (2014): Desember 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (354.367 KB) | DOI: 10.13170/depik.3.3.2147

Abstract

The aim of his studi was to evaluate the fish fauna in Danau Cala in dry season, transition season, and the tide season. The survey was conducted 3 times on July 2013, October 2013 and January 2014 as representative of dry, transition and tide seasons. The fish sampling was conducted by gillnets and fish traps. A total of 35 fish species were recorded during the study; 23 species in dry season, it was dominated by tembakang fish (Helostoma temminckii) from family Helosmatidae, Sepat siam fish(Trichogaster pectoralis) from Belontiidae family, and snakehead fish (Channa striata) of Channidae family. A total of 16 species were recorded on transitional seasons where baung fish (Hemibagrus nemurus) of the family Bagridae, and seluang fish (Rasbora sp) of the family Cyprinidae were predominant. In addition, 15 fish species were recorded on tide season which was dominated by baung fish (Hemibagrus nemurus) and tendon fish (Mystus sabanus) of family Bagridae
Karakteristik morfologi teritip spons Indonesia Sulistiono .; Mujizat Kawaroe; Hawis Madduppa; Romanus Edy Prabowo
Depik Vol 3, No 2 (2014): August 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (953.137 KB) | DOI: 10.13170/depik.3.2.1553

Abstract

Abstract. Research on the sponge barnacle of Indonesia is very rare, and this study is aimed to describe the morphological characteristics of sponge barnacles and their specific relationship with their sponge host species. This research was a survey and sponge samples were collected by tearing apart any available sponge found in three sampling locations, typically coral reef areas of Weh Island, Seribu Islands, and Karimunjawa Islands. Sponge barnacles contained in sponge samples were observed using stereo microscope and scanning electron microscope, and species identification was determined based on the morphological description of Darwin (1854), Pilsbry (1916), Martin dan Davis (2001), and Kolbasov (1993). Four species of sponge barnacles were found consisting of Acasta cyathus, Acasta fenestrata, Euacasta dofleini, and Membranobalanus longirostrum. Specific relationships of barnacle and its sponge host were found between Euacasta dofleini and Haliclona sp. and between Membranobalanus longirostrum and Suberites sp. respectively. Keywords : sponge; barnacle; acasta; membranobalanus; biodiversityAbstrak. Penelitian teritip spons Indonesia jarang dilakukan sejak kelompok ini pertama kali dideskripsikan hingga saat ini. Tujuan dari penelitian ini adalah untuk mengkaji karakter morfologi teritip spons Indonesia dan untuk mengkaji hubungan spesies spesifik teritip terhadap spons. Pengambilan sampel pada penelitian ini dilaksanakan sejak Oktober sampai Desember 2012 di tiga lokasi yaitu Pulau Weh, Kepulauan Seribu, dan Kepulauan Karimunjawa. Metode penelitian menggunakan metode survei dan titik pengambilan sampel dipilih berdasarkan keberadaan spons. Sampel diamati menggunakan mikroskop stereo dan mikroskop elektron kemudian diidentifikasi berdasarkan deskripsi Darwin (1854), Pilsbry (1916), Martin dan Davis (2001), dan Kolbasov (1993). Hasil penelitian didapatkan empat spesies teritip spons yaitu Acasta cyathus, A. fenestrata, Euacasta dofleini, dan Membranobalanus longirostrum. Terdapat hubungan spesies spesifik antara teritip dan spons inang yaitu antara teritip E. dofleini dan spons Haliclona sp. dan antara teritip M. longirostrum dan spons Suberites sp. Kata kunci : teritip; spons; acasta; membranobalanus; biodiversitas
Aquatic environmental characteristic of Singkil Swamp Wildlife Reserve in Aceh Singkil Regency Nur Rohim; Sulistiono Sulistiono; Fredinan Yulianda
Depik Vol 11, No 1 (2022): April 2022
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (530.077 KB) | DOI: 10.13170/depik.11.1.22863

Abstract

 Singkil Swamp Wildlife Reserve is a peat swamp ecosystem located in Aceh Singkil Regency, Aceh Province. Peat swamp ecosystem has an important function in protecting and balancing water systems, carbon stocks and biodiversity conservation. However, information on the characteristics of the waters of this ecosystem is still not widely known, especially in the area of utilization that is influenced by community activities. This study aims to determine the aquatic environmental characteristics of the Singkil Swamp Wildlife Reserve utilization area covering the physical and chemical parameters of the water and the relationship among those parameters. Sampling was carried out through field observations both in-situ and ex-situ at 5 stations for 3 months (April-June 2021). Observations were made on water quality parameters namely temperature, transparency, depth, current, colour, salinity, water smell, pH, DO, TDS, TSS, conductivity, phosphate and nitrate. Analysis of the data was conducted, namely correlation analysis, PCA (Principal Component Analysis) and CA (Cluster Analysis). The water color was black and the pH was acidic, that is a characteristic of the swamp waters. The results of the measurement of water quality parameters indicate that TDS (13-44 mg/l), TSS (9-236 mg/l), total phosphate (0.01-2.14 mg/l), and nitrate (0.5-25.7 mg/l) were suitable for freshwater aquaculture to support fishery reserve. Based on the clustering of those stations, 5 observation stations were grouped into two different groups, namely cluster 1 with the number of observation stations of 2 stations (Stations 1 and 2) and cluster 2 with the number of observation stations of 3 stations (3, 4 and 5). The parameter values of total phosphate, pH, DO, and nitrate in cluster 1 tend were higher than in cluster 2.Keywords:Peat swampFreshwaterWater quality
Karakteristik morfologi teritip spons Indonesia Sulistiono .; Mujizat Kawaroe; Hawis Madduppa; Romanus Edy Prabowo
Depik Vol 3, No 2 (2014): August 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.3.2.1553

Abstract

Abstract. Research on the sponge barnacle of Indonesia is very rare, and this study is aimed to describe the morphological characteristics of sponge barnacles and their specific relationship with their sponge host species. This research was a survey and sponge samples were collected by tearing apart any available sponge found in three sampling locations, typically coral reef areas of Weh Island, Seribu Islands, and Karimunjawa Islands. Sponge barnacles contained in sponge samples were observed using stereo microscope and scanning electron microscope, and species identification was determined based on the morphological description of Darwin (1854), Pilsbry (1916), Martin dan Davis (2001), and Kolbasov (1993). Four species of sponge barnacles were found consisting of Acasta cyathus, Acasta fenestrata, Euacasta dofleini, and Membranobalanus longirostrum. Specific relationships of barnacle and its sponge host were found between Euacasta dofleini and Haliclona sp. and between Membranobalanus longirostrum and Suberites sp. respectively. Keywords : sponge; barnacle; acasta; membranobalanus; biodiversityAbstrak. Penelitian teritip spons Indonesia jarang dilakukan sejak kelompok ini pertama kali dideskripsikan hingga saat ini. Tujuan dari penelitian ini adalah untuk mengkaji karakter morfologi teritip spons Indonesia dan untuk mengkaji hubungan spesies spesifik teritip terhadap spons. Pengambilan sampel pada penelitian ini dilaksanakan sejak Oktober sampai Desember 2012 di tiga lokasi yaitu Pulau Weh, Kepulauan Seribu, dan Kepulauan Karimunjawa. Metode penelitian menggunakan metode survei dan titik pengambilan sampel dipilih berdasarkan keberadaan spons. Sampel diamati menggunakan mikroskop stereo dan mikroskop elektron kemudian diidentifikasi berdasarkan deskripsi Darwin (1854), Pilsbry (1916), Martin dan Davis (2001), dan Kolbasov (1993). Hasil penelitian didapatkan empat spesies teritip spons yaitu Acasta cyathus, A. fenestrata, Euacasta dofleini, dan Membranobalanus longirostrum. Terdapat hubungan spesies spesifik antara teritip dan spons inang yaitu antara teritip E. dofleini dan spons Haliclona sp. dan antara teritip M. longirostrum dan spons Suberites sp. Kata kunci : teritip; spons; acasta; membranobalanus; biodiversitas
Aquatic environmental characteristic of Singkil Swamp Wildlife Reserve in Aceh Singkil Regency Nur Rohim; Sulistiono Sulistiono; Fredinan Yulianda
Depik Vol 11, No 1 (2022): April 2022
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.11.1.22863

Abstract

Singkil Swamp Wildlife Reserve is a peat swamp ecosystem located in Aceh Singkil Regency, Aceh Province. Peat swamp ecosystem has an important function in protecting and balancing water systems, carbon stocks and biodiversity conservation. However, information on the characteristics of the waters of this ecosystem is still not widely known, especially in the area of utilization that is influenced by community activities. This study aims to determine the aquatic environmental characteristics of the Singkil Swamp Wildlife Reserve utilization area covering the physical and chemical parameters of the water and the relationship among those parameters. Sampling was carried out through field observations both in-situ and ex-situ at 5 stations for 3 months (April-June 2021). Observations were made on water quality parameters namely temperature, transparency, depth, current, colour, salinity, water smell, pH, DO, TDS, TSS, conductivity, phosphate and nitrate. Analysis of the data was conducted, namely correlation analysis, PCA (Principal Component Analysis) and CA (Cluster Analysis). The water color was black and the pH was acidic, that is a characteristic of the swamp waters. The results of the measurement of water quality parameters indicate that TDS (13-44 mg/l), TSS (9-236 mg/l), total phosphate (0.01-2.14 mg/l), and nitrate (0.5-25.7 mg/l) were suitable for freshwater aquaculture to support fishery reserve. Based on the clustering of those stations, 5 observation stations were grouped into two different groups, namely cluster 1 with the number of observation stations of 2 stations (Stations 1 and 2) and cluster 2 with the number of observation stations of 3 stations (3, 4 and 5). The parameter values of total phosphate, pH, DO, and nitrate in cluster 1 tend were higher than in cluster 2.Keywords:Peat swampFreshwaterWater quality
Keragaman ikan di Danau Cala, Kabupaten Musi Banyuasin Sumatera Selatan Jifi Abu Ammar; Mohammad Mukhlis Kamal; Sulistiono .
Depik Vol 3, No 3 (2014): Desember 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.3.3.2147

Abstract

The aim of his studi was to evaluate the fish fauna in Danau Cala in dry season, transition season, and the tide season. The survey was conducted 3 times on July 2013, October 2013 and January 2014 as representative of dry, transition and tide seasons. The fish sampling was conducted by gillnets and fish traps. A total of 35 fish species were recorded during the study; 23 species in dry season, it was slot777 dominated by tembakang fish (Helostoma temminckii) from family Helosmatidae, Sepat siam fish(Trichogaster pectoralis) from Belontiidae family, and snakehead fish (Channa striata) of Channidae family. A total of 16 species were recorded on transitional seasons where baung fish (Hemibagrus nemurus) of the family Bagridae, and seluang fish (Rasbora sp) of the family Cyprinidae were predominant. In addition, 15 fish species were recorded on tide season which was dominated by baung fish (Hemibagrus nemurus) and tendon fish (Mystus sabanus) of family Bagridae
Karakteristik morfologi teritip spons Indonesia Sulistiono .; Mujizat Kawaroe; Hawis Madduppa; Romanus Edy Prabowo
Depik Vol 3, No 2 (2014): August 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.3.2.1553

Abstract

Abstract. Research on the sponge barnacle of Indonesia is very rare, and this study is aimed to describe the morphological characteristics of sponge barnacles and their specific relationship with their sponge host species. This research was a survey and sponge samples were collected by tearing apart any available sponge found in three sampling locations, typically coral reef areas of Weh Island, Seribu Islands, and Karimunjawa Islands. Sponge barnacles contained in sponge samples were observed using stereo microscope and scanning electron microscope, and species identification was determined based on the morphological description of Darwin (1854), Pilsbry (1916), Martin dan Davis (2001), and Kolbasov (1993). Four species of sponge barnacles were found consisting of Acasta cyathus, Acasta fenestrata, Euacasta dofleini, and Membranobalanus longirostrum. Specific relationships of barnacle and its sponge host were found between Euacasta dofleini and Haliclona sp. and between Membranobalanus longirostrum and Suberites sp. respectively. Keywords : sponge; barnacle; acasta; membranobalanus; biodiversityAbstrak. Penelitian teritip spons Indonesia jarang dilakukan sejak kelompok ini pertama kali dideskripsikan hingga saat ini. Tujuan dari penelitian ini adalah untuk mengkaji karakter morfologi teritip spons Indonesia dan untuk mengkaji hubungan spesies spesifik teritip terhadap spons. Pengambilan sampel pada penelitian ini dilaksanakan sejak Oktober sampai Desember 2012 di tiga lokasi yaitu Pulau Weh, Kepulauan Seribu, dan Kepulauan Karimunjawa. Metode penelitian menggunakan metode survei dan titik pengambilan sampel dipilih berdasarkan keberadaan spons. Sampel diamati menggunakan mikroskop stereo dan mikroskop elektron kemudian diidentifikasi berdasarkan deskripsi Darwin (1854), Pilsbry (1916), Martin dan Davis (2001), dan Kolbasov (1993). Hasil penelitian didapatkan empat spesies teritip spons yaitu Acasta cyathus, A. fenestrata, Euacasta dofleini, dan Membranobalanus longirostrum. Terdapat hubungan spesies spesifik antara teritip dan spons inang yaitu antara teritip E. dofleini dan spons Haliclona sp. dan antara teritip M. longirostrum dan spons Suberites sp. Kata kunci : teritip; spons; acasta; membranobalanus; biodiversitas
Morfological Variation of Endemic Fish Rainbow Celebensis (Telmatherina celebensis Boulenger) in Lake Towuti, South Sulawesi Nasution, S.H.; Sulistiono, .; Sjafei, D.S.; Haryani, G.S.
Jurnal Akuakultur Indonesia Vol. 3 No. 2 (2004): Jurnal Akuakultur Indonesia
Publisher : Indonesian Society of Scientific Aquaculture (ISSA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (505.492 KB) | DOI: 10.19027/jai.3.5-11

Abstract

Rainbow Celebensis (Telmatherina celebensis Boulenger) is one of endemic fish is a part of richness of biodiversity and world heritage in Lake Towuti. Rainbow Celebensis have beautiful colour especially in male, so that it is an economically and potentially as ornamental freshwater fish. It should be protected from threats because to fear decrease offish population in nature. This research is to know morphological variation of endemic fish rainbow Celebensis based on standard morphometric character in several stations. This research is conducted in Lake Towuti, South Sulawesi from March 2002 until April 2003 in four stations were I: Bakara Cape, II: inlet of Lake Towuti for River Tominanga, III: Loeha Island, IV: outlet of Lake Towuti to River Hola-hola. Sample were collected using experimental gillnet sized of 3A, 1, lA, and VA inch. Measuring offish standard morphometric character to be down on Kottelat et al. (1993) with modification covering 14 characters. The result of univariate and multivariate analysis towards standard morphometric character, could be said that male and female at I, II, III, and IV station is same tendency or to be deacended from one fish population. The characteristic to have influence of male are body hight and length from mouth to first pectoral fin, whereas in female are forskal length, total length, and basic length of second pectoral fin. Key words: Morphological variation. Telmatherina celebensis, lake Towuti.   ABSTRAK Rainbow Selebensis adalah salah satu jenis ikan endemik dan merupakan bagian dari kekayaan sumberdaya hayati dan world heritage, yang terdapat di Danau Towuti. Rainbow Selebensis memiliki warna tubuh yang indah, terutama pada ikan jantan sehingga ikan tersebut berpotensi sebagai ikan hias air tawar yang bernilai ekonomis. Ikan ini perlu dilindungi dari ancaman kepunahan karena dikhawatirkan akan terjadi penurunan populasi ikan tersebut di alam. Penelitian ini bertujuan untuk melihat variasi morfologi ikan rainbow Selebensis berdasarkan karakter morfometrik baku pada beberapa stasiun. Penelitian dilakukan di perairan Danau Towuti, Sulawesi Selatan dari bulan Maret 2002 hingga April 2003 pada empat stasiun, yaitu I: Tanjung Bakara, II: inlet Danau Towuti yang berasal dari Sungai Tominanga, III: Pulau Loeha, dan IV: outlet Danau Towuti yang mengalir ke Sungai Hola-hola. Sampel ikan diperoleh dengan menggunakan jaring insang eksperimen (experimental gillnet) terdiri dari empat ukuran mata jaring yaitu 3A , 1, VA . dan VA inci. Pengukuran karakter morfometrik ikan menggunakan metode baku yang mengacu pada Kottelat et al. (1993) yang dimodifikasi yang meliputi 14 karakter. Berdasarkan hasil analisis univariat dan multivariat terhadap karakter morfometrik baku di setiap stasiun, dapat dikatakan bahwa ikan jantan dan betina pada stasiun I, II, III, dan IV cenderung sama atau berasal dari satu kelompok populasi ikan. Karakter yang paling berpengaruh pada ikan jantan dicirikan oleh tinggi badan dan panjang dari mulut ke sirip punggung pertama, sedangkan pada ikan betina dicirikan oleh karakter panjang forskal, panjang total, dan panjang dasar sirip punggung kedua. Kata kunci: Variasi morfologis. Telmatherina celebensis, Danau Towuti
Co-Authors . Arisyono . Muslihuddin . Sudarmanto ., Carissa A. Furkon Abubakar, Salma Achmad Fahrudin Agus Muji Santoso Agustinus M Samosir Ahmad Zahid Akhmad Firmansyah Aldi Chandra Khoncara Ali Mashar Ali Suman Anang Najamuddin Andi Chadijah Aris Darmansah Azis Purwantoro Bahroin Tampubolon Budhi Utami C.P. Simanjuntak Chadijah, Andi Charles Parningotan Haratua Simanjuntak Citra Sari D.S. Sjafei Diah Etika Maharatih Setiarina Dian Herawati Djadja S . Sjafei Djamar Tumpal F. Lumbanbatu Dwi Ari Budi Retnani Dwi Bayu Rendra Eddy Supriyono Endah Purnamawati Erna Wigati Ertika Noviani Etty Riani F.Y. Tantu Fadly Y Tantu Faleh Setia Budi Fredinan Yulianda G.S. Haryani Gadis Sri Haryani Happy Widyarini Hawis H Madduppa Ida Rahmawati Imas Cintamulya Isdradjad Setyobudiandi Isdrajad Setyobudiandi Ismail Ismail Isnugroho, Endro Issirep Sumardi Jack Mamangke Jifi Abu Ammar Joko Purnomo Kurniawati H Ekosafitri Lilik Rodiana M F Rahardjo M Nursid M. Brodjo M. M. Kamal M. Robiyanto M.M. Kamal Ma’arif, Roisul Marcella Rara Priani Maria Ulfa Megandhi Gusti Wardhana Mennofatria Boer Mita Ory Pakarti Mohammad Mukhlis Kamal Muhammad Atma Aditya Muhammad Fadjar Rahardjo Muhammad Ichsan Ismail Muhammad Raihan Pambudi Muhammad Salman MUJIZAT KAWAROE Murniarti Brodjo Murniarti Brojo Muslihuddin . Muslihuddin . Nadya Adharani Nica Cah yani Nida Urrahma Hidayati Niken T.M. Pratiwi Nur Rohim Nurlisa Alias Butet Nurul Widayati Perangin-angin, Robet Putri, Kharisma Eka R F . Kaswadji R F Kaswadji R. Affandi Rahmat Kurnia Resna Handayani RIDWAN AFFANDI Risa Tiuria Rizqan Khairan Munandar Roisul Ma’arif Romanus Edy Prabowo Rugaya H. Serosero S. Refiani S.H. Nasution Salma Abubakar Santoso . Selia Hermawati Septa Adi Hendarso Setyo Adelia Putri Sigid Hariyadi Siti Sofiah Sonja Kleinertz Subiyanto . Susilo Budi Winarno Suzana Refiani Suzana Refiani Taufik Fakih Hakiki Thomas Nugroho Tuti Panghastuti Ujang Sehabudin, Ujang Wahyuni, Sri Widjojo, Adi Yani Sugiyani Yeni Irawati Yudha Prastyo Yunizar Ernawati Zulkarnaen Zulkarnaen Zulkarnain