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Erlangga Erlangga
JurusanTeknik Kimia PSD III Fakultas Teknik Universitas Diponegoro Semarang Jl. Prof Sudarto SH, Pedalangan Tembalang, Semarang 50239
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Increased density of Thalassiosira sp with different doses of silicate fertilizer Erlangga, Erlangga; Andira, Ayu; erniati, erniati; mahdaliana, mahdaliana; muliani, muliani
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Jurnal Ilmu Perairan, Vol. 8: No. 3 (December, 2021)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v8i3.4685

Abstract

The research was conducted in 11-25 July 2020 at Water Quality and Fish Nutrition Laboratory, Faculty of Agriculture, University of Malikussaleh. The research design used was Completely Randomized Design (CRD) non factorial with 4 treatments and 3 replications. With treatment A: culture of Thalassiosira sp with 15 ppm silicate fertilizer, treatment B: culture of Thalassiosira sp with 17 ppm silicate fertilizer, treatment C: culture of Thalassiosira sp with 19 ppm silicate fertilizer, treatment D: culture of Thalassiosira sp with 21 ppm silicate fertilizer. The result showed that the effect of silicate fertilizer with different dosage gave a different significant to cells Thalassiosira sp density and significantly different to cells Thalassiosira sp peak populasion. The highest average cell density value was found in treatment A (15 ppm) of 419,10 x 104 cells/ml, then treatment B (17 ppm) of 256,67 x 104 cells/ml, followed by treatment C (19 ppm) of 216,29 x 104 cells/ml and treatment D (21 ppm) of 102,90 x 104 cells/ml. The highest cell populasion peak is found in treatment A (15 ppm) of 689,67 x 104 cells/ml, then treatment B (17 ppm) of 389,33 x 104 cells/ml, followed by treatment C (19 ppm) of 388 x 104 cells/ml and treatment D (21 ppm) of 156 x 104 cells/ml. the water quality of the study in standard condision is pH 6,9-8, salinity 32 ppt, light intensity 800-2500 lux, and temperature 25-290C.Keywords: Density; Thalassiosira; silicate
Penetasan telur penyu sisik (Eretmochelys imbricata) dengan kedalaman yang berbeda Erlangga, Erlangga; Lestari, Ayu; Zulfikar, Zulfikar; Khalil, Munawar; Ezraneti, Riri
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Jurnal Ilmu Perairan, Vol. 8: No. 2 (August, 2021)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v8i2.4778

Abstract

This research was conducted from November 2018 until January 2019 which was held at the UPTD Conservation and Supervision of Marine Resources and Fisheries in West Sumatera, Pariaman City.  The aim of the research is to know hatchling hawksbill sea turtle eggs based on nest depth. The method used in this study is a nonfactorial randomized block design (RBD) consisting of 3 treatments and 3 replications. The treatments used were treatment A (with a depth of 30 cm incubation nest), treatment B (with a depth of incubation nest 40 cm), and Treatment C (with a depth of incubation nest 50 cm). The results of this study showed that hatching hawksbill eggs hatched very significantly, the best hatching percentage was in treatment A (30cm) with 78% hatching at 6:00 a.m. with hatching temperature range of 24-28oC, hatching pH of 6,6-6,8 and medium sized incubation sand with a size of 0.150 mm with a weight reaching 461 grams.Keywords: Hatching percentage, Hawksbill turtle, pH, Temperature
Cultivation of microalgae Nannochloropsis sp in chicken manure to increase biomass and lipids as an introduction to biodiesel production Ayuzar, Eva; Mahdaliana, Mahdaliana; Khaidir, Khaidir; Fitria, Ade; Erlangga, Erlangga
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Jurnal Ilmu Perairan, Vol. 9: No. 2 (August, 2022)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v9i2.6721

Abstract

Microalgae is one of the natural resources that has the potential to make biodiesel because it contains a fairly high amount of oil. The content of fat (lipid) and fatty acid (fatty acid) in microalgae is a source of energy and is used as raw material for biodiesel. In lipids there are elements of saturated fatty acids that play a role in the process of making biodiesel. The addition of growth nutrients into microalgae culture media is considered the most influential aspect on the quantity of biomass produced by microalgae cultivation. This study aims to determine the effect of chicken manure on the growth rate of Nannochloropsis sp. and to get the best treatment the lipid content of Nannochloropsis sp. of dry weight. The method used in this study was to use a non-factorial Complete RandomIzed Design (RAL) with 3 repeat treatments. The treatments in this study were A: 0 mg/L, B: 250 mg/L, C: 300 mg/L, D: 350 mgL. The results showed that the effect of giving chicken manure with different doses had a very real effect on the density of Nannochloropsis sp, and population peaks. Treatment B with a dose of 250 mg/L of showed the best results with an average density value of 4713 x 104 cells/ml and a population peak of 9415 x 104 cells/ml and the highest lipid levels found in treatment B, which is 12.73.  Water quality during the study was conditioned standard. Temperature 26 - 27 oC, pH 7.1 - 7.7, DO 5.2 - 6.3 and salinity 31 - 34 ppt. Based on the results of the study found that lipid results are high, so it is possible to try biodiesel testing.Keywords: Biodesel; Biomass; Lipid; Microalgae; Nannochloropsis  sp
Toxicity test of LC-50 (Lethal Concentration) surfactant LAS (Linear Alkylbenzene Sulfonate) against white snapper (Lates calcarifer) fingerlings on a laboratory scale Daulay, Anggi Mayulina; Erniati, Erniati; ˜Akla, Cut Meurah Nurul; Erlangga, Erlangga; Imamshadiqin, Imamshadiqin
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Jurnal Ilmu Perairan, Vol. 9: No. 3 (December, 2022)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v9i3.6780

Abstract

LAS (Linear Alkylbenzene Sulfonate) surfactants are the main cleaning agents from the anionic group found in detergents that are widely used in Indonesia. LAS decomposes in surface water for 1-2 days, in sediments it decomposes for 1-3 days, in marine and estuarine systems it decomposes for 5-10 days. LAS is generally degraded by as much as 90% within 3 months, with a time ranging from 5-30 days (World Health Organization, 1996). LAS surfactants can cause damage to the gill epithelium and blockage of branchiola channels in fish. This study aims to determine the toxic effect of LAS surfactant on the survival of white snapper (Lates calcarifer) fry and to determine the toxicity value of LC50 (Lethal Concentration) of LAS surfactant to white snapper (Lates calcarifer) fry on a laboratory scale. This research was carried out on September 21 - October 04, 2021 at the Marine Science Laboratory, Faculty of Agriculture, Malikussaleh University using laboratory experimental methods with 5 treatments, namely: control treatment A (0 ppm), B (0.83 ppm), C (1.58 ppm). ), D (2.16 ppm), and E (2.91 ppm). The results of this study cause barramundi to experience irregular movements, mouth opening and operculum tend to be fast and irregular, scales are pale and peeling, and cause death, LAS surfactants affect water quality such as pH and dissolved oxygen, but have no effect on salinity and temperature. The 24-hour LC50 value is 1.95 ppm, the 48-hour LC50 value is 1.86 ppm, the 72-hour LC50 value is 1.70 ppm, and the 96-hour LC50 value is 1.58 ppm.Key words: LAS surfactant; LC50; toxicity; white snapper
Analysis of oceanography parameters for the suitability tourism in Bangka Jaya Beach District of Dewantara, North Aceh Erlangga, Erlangga; Husaen, Yusril; Andika, Yudho; Imamshadiqin, Imamshadiqin; Imanullah, Imanullah
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Jurnal Ilmu Perairan, Vol. 9: No. 3 (December, 2022)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v9i3.7038

Abstract

Bangka Jaya Beach is located in Krueng Geukueh Village, Dewantara sub-district. Many tourists who often visit Bangka Jaya beach tourism, therefore it is necessary to analyze the suitability of beach tourism, through this research it will be known the level of tourism suitability to the parameters that have been determined as a determination of the level of security for tourists who carry out beach tourism activities. This study aims to determine the condition of oceanographic parameters for the suitability of Bangka Jaya beach tourism in a beach tourism object and analyze the level of tourism suitability based on the potential of existing resources in the coastal area of Bangka Jaya. Primary data that must be taken in the field include tourism suitability data. The tourism suitability data taken include beach type, beach width, water depth, brightness, current speed, water base material, coastal slope, coastal land cover, hazardous biota and freshwater availability. Primary data collection was carried out in the morning when the sea water was high and in the afternoon when the sea water was receding. The sampling method in this study used a purposive sampling method in December - January 2022. The method used was descriptive analysis using the Tourism Suitability Index (IKW) analysis. The results of the study of the tourism suitability index (IKW) obtained the results of measuring the parameters of tourism suitability of 90.47% which was a very suitable category (S1). The tourism suitability parameter in the tourism suitability index table (IKW) can be seen that almost every parameter is included in the very suitable category (S1) of all parameters there are two parameters that fall into the appropriate category (S2), namely the beach type parameter and the beach slope parameter.Keywords: Beach; Oceanography; Suitability; Tour
Growth and biomass of Wolffia arrhiza with different sources of organic fertilizer Bahagia, Bahagia; Erlangga, Erlangga; Rusydi, Rachmawati; Ayuzar, Eva; Khalil, Munawwar; Hartami, Prama
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 11: No. 2 (August, 2024)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v11i2.12199

Abstract

Wolffia arrhiza has a growth rate and biomass as well as a good nutritional content for the growth of cultivated fish, especially herbivorous fish. Due to the high protein content (up to 45% of the dry weight), Wolffia is an excellent plant for the production of various biologically active substances, especially proteins. These plants can double every 1-6 days, similar to algae or mushrooms, and the number of leaves doubles every 2-3 days. This study aims to determine the effect of different fertilizer sources on doubling time, relative growth rate, population density and biomass of Wolffia arrhiza and water quality. The method used in this research is experimental. The research design used a completely randomized design (CRD) consisting of 4 treatments and 3 replications. The treatments were as follows: treatment A: chicken manure, B: cow manure, C: buffalo manure and D: goat manure with each dose of 200 grams. Parameters observed included doubling time, relative growth rate, population density, biomass and water quality parameters. The results showed that treatment B (cow manure) gave the highest value for doubling time, 1.59 days, relative growth rate 0.392 g/day, population density 209.75 ind/cm2, biomass 94.97. Keyword: Biomass; Fertilizer; Growth; Wolffia
ANALISIS DAYA TAMPUNG BEBAN PENCEMARAN FOSFOR DAN DAMPAK KERAMBA JARING APUNG DI DANAU LAUT TAWAR, ACEH TENGAH Adhar, Saiful; Erlangga, Erlangga; Rusydi, Rachmawati; Mainisa, Mainisa; Prasetya, Yukis Angga; Zaitun, Urmila
Jurnal Riset Akuakultur Vol 18, No 2 (2023): (Juni, 2023)
Publisher : Politeknik Kelautan dan Perikanan Jembrana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jra.18.2.2023.117-127

Abstract

Danau Laut Tawar di Kabupaten Aceh Tengah, Indonesia, memiliki luas permukaan 5.862 ha, garis pantai 49,75 km, kedalaman maksimum 84,23 m, kedalaman rata-rata 25,19 m, dan daerah tangkapan air seluas 18.877 ha. Danau ini merupakan danau tektonik dan bersifat multiguna seperti berperan sebagai sumber plasma nutfah, air baku air minum dan pertanian, perikanan, dan sumber pembangkit listrik tenaga air. Aktivitas antropogenik akibat pemanfaatan sumber daya di daerah tangkapan air dan perairan meningkatkan pemuatan fosfor ke perairan tersebut. Penelitian ini bertujuan untuk menghitung kapasitas beban fosfor dan dampak kegiatan keramba jaring apung terhadap pencemaran fosfor di Danau Laut Tawar. Data primer dan sekunder dikumpulkan dan dianalisis menggunakan berbagai pendekatan seperti studi literatur, pemodelan, pengukuran in-situ serta ex-situ, dan wawancara. Hasil penelitian menunjukkan konsentrasi fosfor di perairan Danau Laut Tawar sebesar 34,00 mg m-3. Beban fosfor dari daerah tangkapan air sebesar 5,19 mg m-3, dengan alokasi beban fosfor sebesar 0,74 mg m-3. Baku mutu fosfor ditetapkan sebesar 40,00 mg m-3, sehingga daya tampung beban pencemaran fosfor mencapai 1,04 ton tahun-1. Keramba jaring apung pada danau memiliki luas 4,46 ha dan menghasilkan limbah fosfor sebanyak 5,25 ton tahun-1 yang terlarut ke perairan danau. Nilai tersebut lebih tinggi dari daya tampung beban pencemaran fosfor pada danau dan memengaruhi kondisi alaminya serta aktivitas yang dilakukan di sekitar danau. Lake Laut Tawar in Central Aceh, Indonesia, covers an area of 5,862 ha with a coastline length of 49.75 km, a maximum depth of 84.23 m, an average depth of 25.19 m, and a catchment area of 18,877 ha. The lake is a tectonic-formed water body and serves various biological and economic functions such as biodiversity resources, water sources for drinking water and agriculture, fisheries, and hydroelectricity. Anthropogenic pressures from economic activities around and within the lake have increased phosphor loading in the water body. This study aimed to determine the phosphor loading capacity and the contribution of floating net cage operation on phosphor pollution in Lake Laut Tawar. Primary and secondary data were collected and analyzed using various approaches such as documents, modeling, in-situ and ex-situ measurements, and interviews. The results showed that the phosphor concentration in the Lake Laut Tawar waters reached 34.00 mg m-3. The phosphor load from the catchment area was 5.19 mg m-3, with the phosphor load allocation of 0.74 mg m-3. The maximum threshold for phosphor concentration in a lake is set at 40.00 mg m-3, bringing the phosphor pollution load capacity of the lake to 1.04 tons year-1. However, the floating net cages in the lake covered an area of 4.46 ha and produced 5.25 tons year-1 of phosphorus waste which dissolved into the lake waters. This value exceeds the phosphorus load capacity of the lake and subsequently affects the lake's natural state and the ecosystem services it provides.
EMPOWERMENT OF GOAT BREEDER BUSINESS GROUP THROUGH ECONOMIC DIGITALIZATION TO INCREASE FOOD CONSUMPTION IN SUPPORTING FOOD SECURITY IN VILLAGES BLANG MIDOK, TANAH LUAS DISTRICT NORTH ACEH Usman, Umaruddin; Erlangga, Erlangga; Likdanawati, Likdanawati; Ramadhan, Azizi; Ariski, Firli
International Review of Practical Innovation, Technology and Green Energy (IRPITAGE) Vol. 1 No. 1 (2021): November 2021 - February 2022
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1273.453 KB) | DOI: 10.54443/irpitage.v1i1.111

Abstract

The main problems faced today are first, limited capital in developing a goat fattening business. Such high demand for goats is not accompanied by the provision of additional cages to place ready-made goat seeds to be fattened. Second, the lack of knowledge and understanding of good goat farming. Including the cleanliness and maintenance of the cage and even maintenance. Third, the lack of understanding of digitalization technology in running a goat fattening business. such as, making financial reports, and online marketing through existing applications. The purpose of this activity to partners is to increase the quantity of goat sales with good quality. Increased sales result in increased revenue that partners will get. Business expansion brings good changes in creating job opportunities to help this business. The method used to solve the problem is assistance such as helping to find business capital, as well as providing the latest digitalization trainings starting from the time this activity is carried out until after this activity is carried out on an ongoing basis.
Pemanfaatan limbah budidaya udang vannamei menjadi pupuk kompos di Gampong Ulee Pulo Kecamatan Dewantara Kabupaten Aceh Utara (The utilization of vannamei shrimp culture waste become compost fertilizer in Ulee Pulo Village, Dewantara Sub District North Aceh District) Erniati, Erniati; Syahrial, Syahrial; Imamshadiqin, Imamshadiqin; Imanullah, Imanullah; Erlangga, Erlangga; 'Akla, Cut Meurah Nurul; Andika, Yudho; Irmayunita, Irmayunita; Handayani, Meutia; Mataniari, Azhari; Dila, Nuriana; Prasetyo, Repki
Buletin Pengabdian Vol 2, No 1 (2022): Bull. Community. Serv.
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/bulpengmas.v2i1.23557

Abstract

This community service aims to provide education and improve the skills of the residents of Ulee Pulo Village in making good use of vannamei shrimp waste. Service activities were carried out using the community development approach method through training based on theory and practice with lectures and focused discussion (focus group discussions). The results of the service were carried out well, structured, smoothly, and successfully involving the community directly, especially the wives of the aquaculture farmers of Gampong Ulee Pulo. The target achieved is that the participants already have the skills and practice the process of making compost independently. In conclusion, the community is skilled in making compost independently.
PENERAPAN STRATEGI KOMUNIKASI VISUAL DALAM (UI) DAN (UX) UNTUK MEMBANGUN KEPUASAN PENGGUNA ERLANGGA, ERLANGGA; FAJAR, MALIK; GYMNASTIAR, GAZALI; HIKMAH, PADEL; WILLYANSAH, WILLYANSAH
JURNAL DATA SAINS DAN TEKNOLOGI INFORMASI (DASTIS) Vol. 2 No. 02 (2025): DASTIS - MEI 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi Bisnis Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62003/tzj3vh61

Abstract

Dalam era digital yang berkembang pesat, desain antarmuka pengguna (User Interface/UI) dan pengalaman pengguna (User Experience/UX) memainkan per an penting dalam menciptakan interaksi yang efektif, efisien, dan menyenangkan bagi pengguna. Strategi komunikasi visual dalam UI dan UX menjadi faktor kunci dalam meningkatkan kepuasan pengguna dengan mengoptimalkan elemen-elemen seperti tipografi, warna, ikonografi, tata letak, dan interaksi visual. Penelitian ini bertujuan untuk mengeksplorasi bagaimana strategi komunikasi visual dalam UI dan UX dapat memengaruhi pengalaman pengguna melalui pendekatan kualitatif berbasis studi literatur. Dengan menganalisis berbagai teori dan penelitian sebelumnya, studi ini menemukan bahwa desain yang intuitif, inklusif, dan berbasis riset dapat meningkatkan keterlibatan pengguna, mengurangi tingkat kesalahan, serta memperkuat loyalitas terhadap suatu platform digital. Selain itu, perkembangan teknologi seperti kecerdasan buatan (AI), augmented reality (AR), dan Internet of Things (IoT) semakin membuka peluang dalam menciptakan UI dan UX yang lebih interaktif dan personal. Penelitian ini diharapkan dapat memberikan wawasan bagi desainer, pengembang, dan praktisi teknologi dalam merancang produk digital yang lebih user-friendly, adaptif, dan berdaya saing di pasar yang semakin kompetitif. 
Co-Authors Adam Sekti Aji Ade Nurdin Akbar, Syawaluddin Ali Alam, Iskandar Alya Nurfaridah Andika, Yudho Anisa Anisa Annisa Wolio, Nurmiyati Anom Maruta Ari Kurniawan Saputra Ari, Ari Kurniawan Saputra Ariski, Firli Aryanti, Andini Setia Ashira, Nurul Ayu Andira AYU LESTARI Aziza, Widia Sahpa Nur Baehaqi Bahagia Bahagia Bambang Hartono Cut Meurah Nurul ‘Akla Daulay, Anggi Mayulina Deddy Kurniawan Wikanta Dila, Nuriana Dini, Nur Amruna Dwi Yulianti, Annisa Dwiyono, Yudo Eka Fitrajaya Rahman Endra , Robby Yuli Enjun Junaeti Erna Piantari Erniati Erniati Erwin Erwin Eva Ayuzar, Eva Fajar, Malik Fathimah, Nusuki Syari'ati Febrina Rolin Febriza, Delia Fenty Ariani Fitri, Zakiatul Fitria, Ade Fitriani Fitriani Gumilang, Muhamad Dzikri Gurusinga, Eliana Mahesa GYMNASTIAR, GAZALI Hadinata, Fitra Wira Handayani, Meutia Hariningsih, Hariningsih Harmes, Harmes Hayatun Nufus Haykal Ramadhan, Salman Hermawan Dwi A Hermawan, Nadira Arevia Hermawan, Raihan Cagiva HIKMAH, PADEL Himmah, Amirah Dzatul Husaen, Yusril Hutwan Syarifuddin Imamshadiqin, Imamshadiqin Iman Syahrizal Imanullah, Imanullah Irmayunita, Irmayunita Jamin, Jamin Johannes Alexander Putra Judie, Rizky Rachman Julianda Sahputra, Julianda Khaidir Khaidir, Khaidir Khansa Rakha Dimas, Rocky Kresno Wikan Sadono Kurniawan, Ahmad Shaleh Kusnendar, Jajang Leni, Yusyam Likdanawati Lukman, A. Ismail Lukmanul Hakim Lusiana, Andria Mahdaliana, Mahdaliana Mainisa, Mainisa Mardiah, Nur Ainun Mariana Mariana Marzuki, Erliza Mataniari, Azhari Maulana, Asroful Maulida, Aulia Maullana Arifin, Muhammad Misrita, Misrita Mohamad Endy Y Muchammad Fauzi Muhammad Amin Muhammad Ardiansyah Muhammad Riza Abqari Muhammad Robi, Muhammad Muliani Muliani, Muliani Mulyati, Awin Munawar Khalil Munawwar Khalil, Munawwar Mutia Mutia, Mutia Mutmainnah Mutmainnah Muwardi, Haris Nella Tri Agustini, Nella Tri Ningsih, Irma Fahrizal Butsi Nuklirullah, M. Nurmayanti, Nurmayanti Pamanalu, Analdi Pengestu, Adam Yoga Piantari, Erna Prabawa, Harsa Wara Prama Hartami Prasetya, Yukis Angga Prasetyo, Repki Putri, Adinda Aulia Putro, Budi Laksono Rachmawati Rusydi, Rachmawati Rahman, Erwan Rahmatul Husna, Rahmatul Raka Ibnu Firdaus Ramadansyah, Syahrul Ramadhan, Azizi Rasim, Rasim Rika Anggraini Riri Ezraneti Risnita Tri Utami Ritonga, Gara Hasonangan Rizky, Lalu Muhamad Faisal Sabrawijaya Sabrawijaya Safiyah, Resalatus Saiful Adhar salamah salamah Salsabilla, Hanum Sam Hermansyah Sariasi, Puspita Setialestari, Renny Sigalingging, Kevin Noven Siregar, Herbert Siti Suharyatun Situmorang, Devi Permata Sari Srinanda Rizki, Srinanda Sundari, Ellys Mei Surbakti, Livia Chasinta Sutiana Sutiana, Sutiana SYAHRIAL SYAHRIAL Syamsiar, Syamsiar Taqwan Thamrin Thomas Triadi Putranto, Thomas Triadi Tia Tanjung, Tia Usman, Umaruddin Ute Chairuz M Nasution Wahyuni, Riri Wawan Gunawan Welmar Olfan Barat, Welmar Olfan Wihardi, Yaya willyansah, willyansah Winda Rahmawati Wiwin Susanty Yudistira, Andrian Zaitun, Urmila Zaki, Muhammad Radin