Universitas Sriwijaya (UNSRI): E-Journal
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Forecasting of Daily Gold Price using ARIMA-GARCH Hybrid Model
Get PDFGold is a multifunctional precious metal. Apart from being jewelry, gold is a form of investment. For this reason, the public or investors need to know the estimated daily gold price for transactions for the public or investors who want to invest or also want to sell their gold, so they do not lose. This is the aim of this study. Many forecasting methods can be used to predict the daily gold price, but this study uses the ARIMA-GARCH hybrid model because this model can predict econometric models such as the daily gold price which usually contains high volatility. Daily gold price data was secondary data obtained from the investing.com website. The data was for the period March 12, 2016, to December 31, 2020. The results of this study are obtained for the ARIMA (1,1,1) -GARCH (2,1) hybrid model with a root mean square error (RMSE) forecasting accuracy value is 2.375454, the mean absolute error (MAE) is 1.702908, and the mean absolute percentage error (MAPE) is 0.001168113. From the results of this study, long-term investment is very profitable because there is an upward trend from the model obtained. For short-term investments, the public or investors have to update the research result model because the current gold price is influenced by the gold price only one period ago, so that when trading does not lose
Peningkatan power endurance dan daya tahan otot melalui continuous running
Get PDFSepak bola merupakan olahraga yang sangat popular di dunia yang dimainkan oleh 2 regu yang masing-masing berjumlah 11 orang dengan tujuan untuk mencetak gol sebanyak-banyaknya dan menjadi pemenang. Seorang pemain sepakbola dapat bermain dengan efektif dan maksimal perlu didukung dengan kondisi fisik dan daya tahan otot serta program latihan yang terpadu dan terpantau dan pemahaman taktik yang baik. Oleh karena itu tujuan penelitian ini yaitu untuk melihat manakah yang dapat meningkatkan power endurance dan daya tahan otot melalui latihan continous running. Metode yang digunakan pada penelitian ini adalah studi eksperimen two group pretest posstest design. Teknik pengambilan data dalam penelitian ini adalah non probability sapling. Sample dalam penelitian ini berjumlah 16 orang atlet SSB Darma Sakti. Pengambilan data dengan metode analisis data dilakukan menggunakan paired simple t test untuk mengukur hasil pretest dan postest yang sudah didapat pada saat penelitian serta uji hipotesis menunjukkan bahwa hasil pretest dan posttest dapat disimpulkan latihan continous running dengan power endurance dan continous running dengan daya tahan otot mendapatkan hasil peningkatan yang signifikan
Analisis hubungan makro nutrisi dengan daya tahan kardiorespiratori, koordinasi, dan kelincahan pesilat amatir
Get PDFOlahraga erat kaitannya untuk menunjang kesehatan tubuh. Berbagai klub cabang olahraga sudah ada di Indonesia dan siap untuk membantu para atlet dalam meraih prestasi. Agar dapat menjadi seorang atlet yang berprestasi maka dibutuhkan kondisi fisik yang bagus serta asupan nutrisi yang seimbang. Penelitian ini bertujuan untuk menganalisis hubungan asupan makro nutrisi (karbohidrat, lemak, protein) dengan komponen kondisi fisik (daya tahan kardiorespiratori, koordinasi, kelincahan) pada cabang olahraga silat. Penelitian ini menggunakan metode kuantitatif dengan teknik analisis korelaional. Hasil penelitian menunjukkan adanya hubungan antara asupan makro nutrisi dengan komponen kondisi fisik pesilat, akan tetapi hubungan tersebut memiliki arah hubungan yang berbeda dan kuat lemah hubungan yang berbeda pula. Simpulan yang dapat didapat dari penelitian ini yaitu, terdapat hubungan antara kedua variabel tersebut, akan tetapi kuat lemah hubungan juga berbeda
EFFECT OF CUTTING PARAMETERS ON LOW CARBON STEEL SURFACE ROUGHNESS IN THE CONVENTIONAL TURNING PROCESS
Get PDFIn the turning process, the surface roughness is affected by cutting parameters such as cutting speed, depth of cut, feed rate, and so on. However, there is not much information about the relationship or interaction between cutting parameters and the resulting surface roughness. This study aimed to examine the effect of cutting parameters on the surface roughness value of low carbon steel. This research was conducted experimentally using a conventional lathe with a HSS insert without the use of cutting fluids. It was concluded that the cutting parameters had a significant effect on the surface roughness. The lowest surface roughness value was obtained at 280 rpm spindle speed, 0.5 mm depth of cut and 0.2 mm/rev. feed rate with a roughness value of 2.968 µm. The contribution of each parameter to the surface roughness were 42.2% of spindle speed, 10% of depth of cut and 20.3% of feed rate respectively
KETERLIBATAN POLITIK AKTIVIS MAHASISWA MELALUI MEDIA ONLINE
Get PDFAbstractThe development of online media has an impact on changes access and integration from conventional media to online media. Media digitization also leads to accelerated communication and interactivity as well as changes in political engagement. The purpose of this article is to describe the political involvement of student activists through online media. This type of research uses survey research with a quantitative approach. The population in the study amounted to 651 members who came from the Student Executive Board activists at Yogyakarta State University in 2018. The research sample used was 90 students. Analysis on descriptive statistics is done by determining the frequency distribution, position of numerical scores that represent such as mean, median, and mode. The results of data analysis show that the majority of student activists who seek political news through online media are 40%, the most frequently accessed site is Kompas.Com by 45.6%, political learning media through mass media and organizations by 35.6%. The political themes that are often accessed are related to the change of power, political policies on education, social and economic development with a percentage of 43.3%. The effort to filter the highest information lies in viewing different online mass media channels by 26.7%. Political involvement in the form of writing, audio and video as well as social media with a percentage of 34%. The form of political involvement in the online media space is the majority of writing aspirations using social media with 26.7% of participants.Keywords: Online media, Politics, Student activistsABSTRAKPerkembangan media online berdampak terhadap perubahan akses serta integrasi dari media konvensional kepada media online. Digitalisasi media juga mengarah pada percepatan komunikasi dan interaktivitas serta perubahan keterlibatan politik. Tujuan artikel ini untuk mendeskripsikan keterlibatan poliitk aktivis mahasiswa melalui media online. Jenis penelitian menggunakan penelitian survey dengan pendekatan kuantitatif. Populasi dalam penelitian berjumlah 651 anggota yang berasal dari aktivis Badan Eksekutif Mahasiswa di Universitas Negeri Yogyakarta pada tahun 2018. Sampel penelitian yang digunakan berjumlah 90 mahasiswa. Analisis pada statistik deskriptif dilakukan dengan menentukan distribusi frekuensi, posisi skor numerik yang mewakili seperti mean, median, dan modus. Hasil analisis data menunjukan mayoritas aktivis mahasiswa yang mencari berita politik melalui media online 40%, situs yang paling sering diakses Kompas.com sebesar 45,6%, media belajar politik melalui media massa dan organisasi sebesar 35,6%. Tema politik yang sering diakses terkait pergantian kekuasaan, kebijakan politik tentang pendidikan, pembangunan sosial dan ekonomi dengan persentase sebesar 43,3%. Upaya untuk menyaring informasi tertinggi terletak pada melihat saluran media massa online yang berbeda sebesar 26,7%. Majalah politik online yang sering dibaca adalah tempo sebesar 37,8%. Bentuk keterlibatan politik dalam ruang media online mayoritas menulis aspirasi menggunakan media sosial dengan pesertase sebesar 26,7%.Kata Kunci: Media online, Politik, Aktivis Mahasiswa
PENGUATAN KARAKTER INTEGRITAS DI SD MUHAMMADIYAH KADISOKA YOGYAKARTA PADA MASA PANDEMI
Get PDFScience and technology is now growing rapidly, causing concern both among educators and parents so that efforts are needed to instill and develop personality and character from an early age which are carried out in an integrated manner. This of course requires monitoring from various parties, such as formal institutions such as schools and informal institutions such as families (parents). This study aims to determine the strengthening of the character of integrity in SD Muhammadiyah Kadisoka Yogyakarta during the pandemic. This type of research uses qualitative research. The research method used is descriptive qualitative. This research was conducted at SD Muhammadiyah Kadisoka Yogyakarta with the research subject being the principal, curriculum representative, class teacher, parents of students, and students. Data collection techniques were in the form of observation, interviews and documentation. The results showed that 1) strengthening the character of integrity during the pandemic was carried out through daily activity books. 2) The teacher gives directions regarding the daily activity book as a guidebook during the pandemic. 3) Parents accompany and monitor children's activities while at home as outlined in the daily activity book. 4. Teachers and parents give rewards to students who are disciplined in filling out, collecting and carrying out daily activities and providing punishment for students who lie and are not responsible for carrying out daily activities.Keywords: Character Integrity, Elementary School, PandemiIPTEK kini berkembang dengan pesatnya sehingga menimbulkan kekhawatiran baik dikalangan pendidik maupun orang tua sehingga perlu upaya penanaman dan pembinaan kepribadian dan karakter sejak dini yang dilakukan secara terpadu. Hal ini tentunya membutuhkan pantauan dari berbagai pihak yakni seperti lembaga formal seperti sekolah dan informal seperti keluarga (orang tua). Penelitian ini bertujuan untuk mengetahui penguatan karakter integritas di SD Muhammadiyah Kadisoka Yogyakarta dimasa pandemi. Jenis Penelitian menggunakan penelitian kualitatif. Metode penelitian yang digunakan adalah deskriptif kualitatif. Penelitian ini dilaksanakan di SD Muhammadiyah Kadisoka Yogyakarta dengan subjek penelitian kepala sekolah, wakil kurikulum, guru kelas, orang tua peserta didik, serta peserta didik Teknik pengumpulan data berupa observasi, wawancara dan dokumentasi. Hasil penelitian menunjukkan bahwa 1) penguatan karakter integritas di masa pandemic dilakukan melalui buku kegiatan harian. 2) Guru memberi arahan mengenai buku kegiatan harian sebagai buku panduan selama pandemi. 3) Orang tua mendampingi dan memantau aktivitas anak selama di rumah yang dituangkan dalam buku kegiatan harian. 4. Guru dan Orang tua memberikan reward kepada peserta didik yang disiplin dalam mengisi, mengumpulkan dan melaksanakan kegiatan harian dan memberikan punishment bagi peserta didik yang berbohong dan tidak tanggungjawab dalam melaksanakan kegiatan harianKatakunci: Karakter Integritas, Sekolah Dasar, Pandem
LITERASI MATEMATIKA DITINJAU DARI SELF EFFICACY DENGAN MENGGUNAKAN PROBLEM SOLVING LEARNING MODEL DENGAN STRATEGI SCAFFOLDING
Get PDFLiterasi matematika dan self efficacy mempunyai peranan penting dalam matematika. Dalam mengajarkan literasi matematika perlu dikembangkan sikap kepercayaan diri siswa. Model pembelajaran yang dianggap tepat yaitu problem solving learning dengan strategi scaffolding. Model ini memberi peluang siswa untuk menyelesaikan masalah yang diberikan secara mandiri sehingga mampu menerapkan konsep yang telah diperolehnya dan scaffolding memberi bantuan secukupnya kepada siswa berdasarkan pada bentuk kesulitan yang dialaminya. Tujuan penelitian ini untuk menganalisis literasi matematika ditinjau dari aspek self efficacy siswa. Penelitian ini merupakan penelitian kombinasi dengan desain eksplanatori sekuensial. Subjek penelitian yaitu siswa kelas V SDN Sidorejo Tapah. Mereka digolongkan berdasarkan kategori self efficacy yaitu tinggi dan sedang. Pengumpulan data kuantitatif dengan tes literasi matematika dan pengumpulan data kualitatif adalah angket dan wawancara. Hasil penelitian menunjukkan bahwa (1) literasi matematika siswa dalam kategori sedang, (2) rata-rata literasi matematika siswa ditinjau dari self efficacy yang memperoleh pembelajaran problem solving learning dengan strategi scaffolding lebih dari siswa yang memperoleh pembelajaran konvensional, (3) literasi matematika siswa dengan self efficacy tinggi hampir dapat menguasai semua indikator dengan baik, siswa dengan self efficacy sedang mampu menguasai beberapa indikator. Dapat disimpulkan bahwa problem solving learning dengan strategi scaffolding dapat meningkatkan literasi matematika siswa
ENHANCING EFL LEARNERS’ READING COMPREHENSION THROUGH SQ4R METHOD AT THE SECONDARY SCHOOLS
Get PDFThis study is intended to investigate how EFL secondary students’ reading comprehension can be enhanced through the SQ4R method. The design of this study was classroom action research which involved 31 students from class IX-A of one secondary school in Samarinda, Indonesia. Two instruments were used in this study, i.e., an observation sheet and a reading test. The observation data were qualitatively analyzed using the provided checklist, while the data from reading test was quantitatively analyzed by having percentage analysis and categorizing the results into score levels. The results revealed that the implementation of the SQ4R method could enhance the students’ reading comprehension achievement. Quantitatively, 18 students (58%) out of 31 passed the KKM (minimum completeness criteria) in cycle 1; meanwhile, in cycle 2, 27 students (87%) out of 31 students passed the KKM. In addition, problems faced by the collaborator-teacher can be solved by the dynamics happening in the two cycles, which results in the betterment of the teaching and learning process using the SQ4R method. The reflection from the two cycles showed that SQ4R can improve EFL students' reading comprehension. As the method's impacts develop, teaching and learning quality changes
STUDENTS’ LEARNING APPROACH IN THE EFL ONLINE LEARNING CONTEXT
Get PDFThe switching between conventional learning to online learning during this pandemic quite affected the learning approach adopted by students. This study aims to determine the learning approach of the eighth-grade students at one of public schools in Bali during online learning. The mixed-method was used in this study with two instruments for data collection: the R-SPQ-2F questionnaire and semi-structured interviews. This study involved 168 eighth grade students of one public junior high school in Bali. The analysis of the mean score of R-SPQ-2F was used to evaluate the data from questionnaire, while the interactive model analysis was used to analyze the interview data. Based on the findings, the learning method of the eight-grade students in the context of online learning tends to be of deep approach. The results of the interview revealed that the student learning approach was influenced by several supporting and inhibiting factors. This shows that student learning approaches can adapt and be influenced by various factors faced by students during the learning process. These factors can come from within students and students’ learning environment. Therefore, teachers should have a better understanding of learning approaches adopted by students during online learning situations to assist students in achieving learning success.Keywords: EFL, online learning, students’ learning approac
Agresi Militer Belanda di Wilayah Batu Pujon 1947-1948: Sebuah Kajian Sejarah Lokal
Get PDFAbstrak: Peristiwa yang menandai periode 1945-1950 adalah Agresi Militer I dan II oleh pemerintah Belanda dengan mengerahkan berbagai divisi militer sebagai upaya merebut kembali tanah jajahan. Keinginan besar Belanda untuk mendapatkan kekuasaan kembali atas Indonesia setelah proklamasi merupakan salah satu bentuk ancaman nyata yang harus dihadapi oleh bangsa Indonesia. Dengan dalih "Aksi Polisionil", tentara Belanda melakukan aktifitas militer di wilayah Indonesia, sekaligus melanggar perjanjian yang telah disepakati sebelumnya. Gejolak di berbagai daerah mulai muncul, salah satunya terjadi di wilayah Batu-Pujon. Monumen status quo lijn di daerah Pujon menjadi simbol batas pendudukan Belanda dan wilayah Republik. Pertempuran yang terjadi di wilayah Batu-Pujon merupakan salah satu dari sekian banyak pertempuran yang terjadi selama periode Agresi Militer. Artikel ini ditulis dengan menggunakan metode penelitian sejarah untuk menceritakan peristiwa Agresi Militer Belanda dalam konteks sejarah lokal wilayah Batu- Pujon.Kata Kunci: Agresi, Militer, Belanda, Batu, Pujon, TNI.Abstract: One of the events marking the period 1945-1950 was the Military Aggression I and II which deployed many military divisions in an effort to fight for independence in the regions. The Dutch' great desire to regain control of Indonesia after the proclamation is one form of real threat that must again be faced by the Indonesian nation. Under the pretext of "Police Action", the Dutch soldiers carried out military activities while violating a previously agreed agreement. Turmoil in various regions began to appear, one of them in the Batu-Pujon region which is one of the highlands and flanked by several mountains. The status quo monument in Pandesari area became a symbol of the boundaries of dutch occupation and Republic territory. The battle that took place in the Batu-Pujon region was a small battle that took place during the Military Aggression. This article written by using the historical research methods try to explain the history of Dutch Military Agression in the local history context of Batu-Pujon region. Keywords: Agression, Batu, Pujon, Indonesian, National, Army