Open Cluster Evolutions in Binary System: How They Dissolved

Binarity among stellar clusters in galaxy is such a reality which has been realized for a long time, but still hides several questions and problems to be solved. Some of binary star clusters are formed by close encounter, but the others are formed together from similar womb. Some of them undergo separation process, while the others are in the middle of merger toward common future. The products of merger binary star cluster have typical characteristics which differ from solo clusters, especially in their spatial distribution and their stellar members kinematics. On the other hand, these merger products still have to face dissolving processes triggered by both internal and external factors. In this study, we performed N-body simulations of merger binary clusters with different initial conditions. After merging, these clusters dissolve with greater mass-loss rate because of their angular momentum. These rotating clusters also experience more deceleration caused by external tidal field.Comment: presented in International Conference on Mathematics and Natural Sciences 201

RANCANG BANGUN TIKET MENGGUNAKAN RFID PADA PERSEWAAN MOBIL MAINAN ATMEGA16

ABSTRAKArifiyanto, Fajar Nur 2014, Rancang Bangun Ticket Mengunakan RFID Pada Persewaan Mobil Mainan ATMega16. Tugas Akhir, Program Studi Teknik Informatika, Fakultas Teknologi Informasi, Universitas Kanjuruhan Malang. Pembimbing : Alexius Endy Budianto, S. Kom., MM.Kata Kunci : RFID, Tag RFID, persewaan bom-bom carDalam wahana permainan terkadang terjadi kecurangan yang dilakukan oleh pegawai demi keuntungan pribadi. Sehingga dapat merugikan pihak pengelolah taman bermain. Bom-bom car dalam transaksinya menggunakan koin yang ditukarkan pegawai. Penggunaan koin tidak efektif karena biasanya terjadi kecurangan. Kecurangan yang terjadi saat menggunakan koin adalah dengan mencongkel koin, dengan demikian para pengunjug tidak harus menukarkan koin lagi. Menyadari kecurangan seperti ini peneliti ingin membuat rancang bangun ticket menggunakan RFDI pada persewaan mobil mainan berbasis AT MEGA 16 supaya pihak pengelolah tidak dirugikan oleh pegawai yang nakal.ABSTRACTArifyanto, Nur Fajar 2014 Ticket Design Build Using RFID In Toy Car Rental ATMega16. Final Project, Program Information Engineering, Faculty of Information Technology, University of Malang Kanjuruhan. Supervisor: Alexius Budianto Endy, S. Comm., MM. Keywords: RFID, RFID Tags, rental car bombs In sometimes rides fraud committed by an employee for personal gain. So it can harm pengelolah playground. Car bombs in their transactions using coins were exchanged for employees. The use of coins is usually ineffective because of fraud. Cheating happens when using coins is by prying the coin, thus the pengunjug not have to exchange the coins again. Recognizing cheating like this design the researcher wants to make a ticket using the rental car toy RFDI based AT MEGA 16 so that the pengelolah not harmed by rogue employees

Efek Hepatoprotektor Ekstrak Tempe Kedelai pada Mencit (Mus musculus) yang Diinduksi Parasetamol

Background: Soybean tempeh is known to contain various kinds of antioxidants such as vitamin C, vitamin E, vitamin B2, saponins, isoflavones, phytic acid, lecithin, iron, and phytosterol. Antioxidants are thought to be hepatoprotective. The objective of this research is to know the influence of soybean tempeh extract to the liver histological damage of mice (Mus musculus) and the increase of soybean tempeh extract dose can also increase protection effect to the liver histological damage of mice (Mus musculus) which is induced by paracetamol. Methods: This was laboratory experimental research with the post test only controlled group design. Samples were 32 male mice, Swiss webster type, 2-3 months old age and ± 20 g of each weight. Samples were divided into 4 groups of 8 mice each. Sampling technique used in this research was incidental sampling. Mice for control group (K) and P1 group will be given aquadest for 14 days in a row. The P2 and P3 group will be given soybean tempeh extracts dose for 14 days in a row. Soybean tempeh extracts dose in each group was 2.2 mg/20 g weight of mice and 4.4 mg/20 g weight of mice. Paracetamol will be given to P1, P2, and P3, with dose 5 mg/20g weight of mice on the 12 th to 14 th days. On the 15 th day, hepar of mice was taken and stainned with Hematoxylin Eosin (HE) for histopathological study. The hepar cells of mice were observed microscopically by counting the number of necrosis cells on the centrolobuler zone. The data were analyzed by Oneway ANOVA test and Post Hoc test (α=0.05). Results:The average damage of hepar cells in the K, P1, P2, P3 were 20.75 ± 1.58; 85.00 ± 2.98; 43.75 ± 2.92; 31.00±2.00consecutively. The results of Oneway ANOVA test showed a significant difference in all group (p < 0.05). The results of Post Hoc test showed significant differences between K – P1, K – P2, K – P3, P1 – P2, P1 – P3, and P2 – P3 with p < 0.05. Conclusion: The soybean tempeh extracts can prevent the histological damage of the hepar cells of mice (Mus musculus) and the increase of soybean tempeh extracts dose followed by the increase of protection effect to the liver cell damaging of mice which is induced by paracetamo

Implementasi Fatwa MUI Nomor 14 Tahun 2020 Tentang Penyelenggaraan Ibadah Dalam Situasi Terjadinya Wabah Covid-19 di Kota Medan

penelitian ini bertujuan untuk menganalisisisis fatwa Majelis Ulama Indonesia Nomor 14 Tahun 2020 tentang penyelenggaraan ibadah dalam situasi terjadi wabah covid- 19, untuk menganalisis mengenai implementasi Fatwa Majelis Ulama Indonesia Nomor 14 tahun 2020 tentang penyelenggaraan ibadah dalam situasi terjadi wabah covid-19 di kota Medan, dan untuk mengevaluasi penerapan fatwa Majelis Ulama Indonesia Nomor 14 tahun 2020 tentang penyelenggaraan ibadah dalam situasi terjadi wabah covid-19 di kota Medan. Adapun rumusan masalah di dalam tesis ini adalah Pertama, Bagaimana isi fatwa Majelis UlamaIndonesia nomor 14 Tahun 2020 tentang penyelenggaraan ibadah dalam situasi terjadi wabah covid- 19, Kedua, bagaimana implementasi Fatwa Majelis Ulama Indonesia Nomor 14 tahun 2020 tentang penyelenggaraan ibadah dalam situasi terjadi wabah covid-19 di kota Medan dan Ketiga, bagaimana analisis penerapan fatwa Majelis Ulama Indonesia Nomor 14 tahun 2020 tentang penyelenggaraan ibadah dalam situasi terjadi wabah covid-19 di kota Medan.penulis mengkaji tesis ini dengan menggunakan 2 teori yaitu teori maqasid dan utilitarianisme. Jenis penelitian yang digunakan didalam tesis ini yaitu penelitian Hukum empiris atau penelitian lapangan. Dan menggunakan dua pendekatan yaitu Pendekatan Undang-Undang (Statute Approach) dan Pendekatan konseptual (Conceptual Approach). Hasil penelitian tesis ini yaitu Berdasarkan analisa Implementasi Fatwa Majelis Ulama Indonesia Nomor 14 Tahun 2020 tentang penyelenggaraan ibadah dalam situasi terjadinya wabah covid-19 di kota Medan penulis menyimpulkan bahwa penerapan fatwa tersebut masih belum efektif. Dikarenakan berdasarkan wawancara penulis himpun didapati hasil dari beberapa mesjid di Kota Medan hanya menerima himbauan Fatwa Majelis Ulama Indonesia saja namun tidak menjalankan sepenuhnya seperti yang diarahkan oleh fatwa tersebut, mereka mengannggap fatwa tersebut hanya sebatas himbauan saja.Mengenai faktor penghambat penerapan fatwa Majelis Ulama Indonesia Nomor 14 Tahun 2020 tentang penyelenggaraan ibadah dalam situasi terjadinya wabah covid-19 di kota Medan yaitu, pertama, kurangnya penyuluhan mengenai Fatwa MUI Nomor 14 Tahun 2020 tentang penyelenggaraan ibadah dalam situasi terjadinya wabah covid-19 ini. Kedua, Kurangnya kesadaran masyarakat dalam pentingnya Fatwa Majelis Ulama Indonesia Nomor 14 Tahun 2020 ini. Ketiga, zon

Kajian Batimetri Bagi Kepentingan Penambahan Kedalaman Kolam Pelabuhan Di Perairan Tegal

Perairan Tegal merupakan wilayah pesisir bagian utara dari Kota Tegal, Jawa Tengah yang dimanfaatkan sebagai area pelabuhan. Pelabuhan Tegal merupakan pelabuhan nasional yang mempunyai kegiatan utama yaitu perbaikan kapal atau docking untuk kapal berukuran kecil sampai sedang. Kegiatan lain yang dilakukan oleh Pelabuhan Tegal yaitu aktivitas bongkar muat, namun hanya dapat dilakukan oleh kapal yang mempunyai draft kapal maksimal 3 meter karena perairan yang dangkal. Menanggapi hal tersebut, pemerintah Kota Tegal berupaya untuk melakukan pengembangan pelabuhan supaya pelabuhan yang baru dapat melakukan kegiatan docking dan bongkar muat dengan maksimal. Tujuan penelitian ini adalah mendapatkan informasi tentang karakteristik pasang surut dan kondisi batimetri yang disajikan dalam bentuk peta serta menentukan kedalaman tambahan supaya kapal kapasitas 5000 DWT dapat masuk ke dalam kolam pelabuhan. Metode yang digunakan yaitu metode kualitatif yaitu metode yang digunakan untuk mendapatkan data yang mendalam, suatu data yang mengandung makna. Data pasut diolah menggunakan metode admiralty dan kedalaman perairan dihitung dari muka surutan (LLWL) dengan menggunakan Singlebeam Echosounder. Hasil penelitian menunjukan perairan Tegal mempunyai tipe pasang surut campuran dominan ganda dengan muka air rata – rata (MSL) 152,6 cm dan muka surutan sekaligus air rendah terendah (LLWL) 100,71 cm. kedalaman perairan berkisar antara 0,7 – 3 meter dan disarankan untuk menambah kedalaman 6,8 – 8,8 meter

CADIS has seen the Virgo overdensity and parts of the Monoceros and `Orphan' streams in retrospect

We reanalyze deep star counts in five CADIS fields. The data are presented as vertical density distributions of stars perpendicular to the Galactic plane. In three fields the profiles are consistent with each other, while in two fields significant overdensities of stars are found. The overdensity in one field can be associated with the Virgo overdensity which can be traced right into the disk of the Milky Way. Using this detection we estimate the mass of the Virgo overdensity and show that this is equivalent to the stellar content of a Local Group dwarf spheroidal galaxy. The overdensity in the second field is more difficult to associate with a previously known overdensity. We suggest that it is related both to the Monoceros stream and the recently discovered Orphan stream.Comment: 4 pages, 3 figures, accepted as Research Note by Astron. Astrophy

The Formation of Binary Star Clusters in the Milky Way and Large Magellanic Cloud

Recent observations of young embedded clumpy clusters and statistical identifications of binary star clusters have provided new insights into the formation process and subsequent dynamical evolution of star clusters. The early dynamical evolution of clumpy stellar structures provides the conditions for the origin of binary star clusters. Here, we carry out $N$-body simulations in order to investigate the formation of binary star clusters in the Milky Way and in the Large Magellanic Cloud (LMC). We find that binary star clusters can form from stellar aggregates with a variety of initial conditions. For a given initial virial ratio, a higher degree of initial substructure results in a higher fraction of binary star clusters. The number of binary star clusters decreases over time due to merging or dissolution of the binary system. Typically, $\sim 45\%$ of the aggregates evolve into binary/multiple clusters within $t=20$~Myr in the Milky Way environment, while merely $\sim30\%$ survives beyond $t=50$~Myr, with separations $\lesssim 50$~pc. On the other hand, in the LMC, $\sim 90\%$ of the binary/multiple clusters survive beyond $t=20$~Myr and the fraction decreases to $\sim 80\%$ at $t=50$~Myr, with separations $\lesssim 35~$pc. Multiple clusters are also rapidly formed for highly-substructured and expanding clusters. The additional components tend to detach and the remaining binary star cluster merges. The merging process can produce fast rotating star clusters with mostly flat rotation curves that speed up in the outskirts.Comment: accepted 2021 July 5, to be published in MNRAS, 19 page

Dynamics of the Disks of Nearby Galaxies

I describe how the dynamics of galactic disks can be inferred by imaging and spectroscopy. Next I demonstrate that the decomposition of the rotation curves of spiral galaxies into the contributions by the various components of the galaxies is highly degenerate. Constraints on the decomposition can be found by considering implications for the dynamics of the galactic disks. An important diagnostic is the Toomre Q stability parameter which controls the stability of a galactic disk against local Jeans collapse. I also show how the density wave theory of galactic spiral arms can be employed to constrain the mass of a galactic disk. Applying both diagnostics to the example of NGC 2985 and discussing also the implied mass-to-light ratio I demonstrate that the inner parts of the galaxy, where the optical disk resides, are dominated by baryons. When I apply this method to the disks of low surface brightness galaxies, I find unexpectedly high mass-to light ratios. These could be explained by population synthesis models which assume a bottom heavy initial mass function similar to the recently proposed `integrated galactic initial mass function'.Comment: 6 pages, 12 figures, invited contribution to `Galactic and Stellar Dynamics in the era of high resolution surveys', Strasbourg, March 16 -20, 200