Jurnal Online Universitas Terbuka
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EKSPLORASI MIKROORGANISME INDIGENUSINSEPTISOLS
Get PDFInseptisols have various types and densities of microorganisms. Plants that are cultivated in Jatinangor inseptisol fields have a root system that contains a large number of microorganisms. This study aims to be able to provide precise information about the potential resources of microorganisms, bacteria, mycorrhizae from the location of planting corn and soybeans on Jatinangor and Ciparanje inseptisols, Sumedang, West Java. This research activity includes (1) soil sampling which was then isolated on oblique agar media observed with a microscope, (2) identification of spore types, identification of CMA using the Manual for The Identification of Mychorhiza Fungi, (3) calculating the number of spores using the Filter Method Wet Pacioni and Centrifugation Technique from Brunndret. The results showed the number of Bradyrhizobium sp.,was found in the former soil of soybean cropping in Jatinangor and Ciparanje, which was 7,75 x 108 cfu/g, higher than in the former corn crop, 1,80 x 107 cfu / g in Jatinagor and 1,41 x 107 cfu /g at Ciparanje. Inseptisols Jatinangor and Ciparanje also produce spores of Glomus sp. 14 spores /g of soil and 12 spores/g of soil, in the former maize cropland were higher than in the former soybean cropland, which was 10 spores/g of soil.
Ekosistem inseptisols memiliki jenis dan kepadatan mikroorganisme yang beragam. Tanaman yang dibudidayakan di lahan inseptisol Jatinangor memiliki sistem perakaran yang mengandung berbagai jenis mikroorganisme dalam jumlah besar. Penelitian ini bertujuan untuk dapat memberikan informasi yang tepat tentang potensi sumberdaya mikroorganisme, bakteri, mikoriza dari lokasi penanaman jagung dan kedelai padalahan inseptisol Jatinangor dan Ciparanje, Sumedang, Jawa Barat. Kegiatan penelitian ini meliputi (1) pengambilan sampel tanah yang kemudian diisolasi pada media agar miring yang diamati dengan mikroskop, (2) identifikasi jenis spora, identifikasi CMA menggunakan Manual for The Identification of Mychorhiza Fungi, (3) penghitungan jumlah spora dengan menggunakan Metode Saring Basah Pacionidan Teknik Sentrifugasi dari Brunndret. Hasil penelitian menunjukkan jumlah bakteri Bradyrhizobium sp. Lebih banyak ditemukan pada tanah bekas pertanaman kedelai di Jatinangor dan Ciparanje, yaitu 7,75 x 108 cfu/g, sementara pada bekas pertanaman jagung, di Jatinangor 1,80 x 107 cfu/g dan 1,41 x 107 cfu/g di Ciparanje. Inseptisols Jatinangor dan Ciparanje mengandung Glomus sp., di Jatinangor dan Ciparanje berturut-turut 14 spora/g tanah dan 12 spora/g tanah, lebih tinggi pada tanah bekas pertanaman jagung, dibanding pada tanah bekas pertanaman kedelai, yaitu 10 spora/g tanah
EVALUASI KINERJA SAHAM BERTANGGUNGJAWAB SOSIAL (STUDI PADA SAHAM-SAHAM YANG MASUK PERHITUNGAN INDEKS SRI-KEHATI)
Get PDFSeverals studies on the performance of stocks, especially those that examine the constituent of social responsibility in the Indonesia Stock Exchange, in general still focus on the performance assessment of the SRI-Kehati Index, have not specifically reviewed the performance of the constituent stocks of the SRI-Kehati Index. Therefore, this study specifically examines constituent stocks of the SRI-Kehati Index. The study period used is 2009 to 2017. The sample in this study are 13 stocks that consistently enter into the calculation of SRI-Kehati Index during the study period. The stock performance assessment will be performed using Sharpe Index, Jensen Alpha, Treynor Ratio, Sortino Ratio, Information Ratio. Overall, the consistent stocks listed in the SRI-Kehati Index may not necessarily indicate good stock performance. From 13 stocks, some have negative results which can be classified as non-performing stock.
Berbagai penelitian terkait kinerja saham-saham bertanggungjawab sosial di Bursa Efek Indonesia secara umum masih berfokus pada penilaian kinerja Indeks SRI-Kehati, namun belum secara khusus mengkaji kinerja saham-saham pembentuk Indeks SRI-Kehati. Oleh sebab itu penelitian ini secara khusus mengkaji saham-saham pembentuk Indeks SRI-Kehati. Periode penelitian yang digunakan adalah periode tahun 2009 hingga tahun 2017. Sampel dalam penelitian ini adalah 13 saham yang secara konsisten masuk ke dalam perhitungan Indeks SRI-Kehati selama periode penelitian. Penilaian kinerja saham akan dilakukan dengan menggunakan Indeks Sharpe, Jensen Alpha, Rasio Treynor, Rasio Sortino, Information Ratio. Secara keseluruhan, saham-saham yang konsisten terdaftar dalam Indeks SRI-Kehati belum semua menunjukkan kinerja saham yang baik. Dari 13 saham yang diteliti masih ada beberapa saham dengan hasil negatif yang berarti masih mempunyai kinerja saham yang buruk
IMPLEMENTING CONSTRUCTIVISM LEARNING THEORY IN ONLINE TUTORIAL
Get PDFThe advanced development of information and communication technologybrings a significant impact on the way of how human learn. The e-learning orInternet-based and online learning has been widely used in a variety of learning activities as a suplement to the conventional in-class learning, flipped classroom etc. The term e-learning refers to learning activities conducted by the use ofInternet. Universitas Terbuka (UT) utilizes e-learning program in the form of online tutorial. The online tutorial is basically a form of learning support provided by UT to facilitate student to learn. The online tutorial consists of three major learning activities including reading, discussion and assignment. During online tutorial student must complete the assigned activities and interaction with peers, tutor and digital learning resources. Online tutorial can be seen as an instrumental tool that provide an opportunity for students to expandhis/her knowledge and skills beyond the provided printed and digital module. Tutors should be able to design online learning programs that can be used to facilitate students in expanding their knowledge and skills. The purpose of this study is to elaborate conceptually the use of constructivism learning theory in online tutorial of the open and distance learning higher institution
ANALISIS PENERIMAAN DAN PENGGUNAAN TEKNOLOGI (UNIFIED THEORY OF ACCEPTANCE AND USE OF TECHNOLOGY) TUTORIAL ONLINE MAHASISWA PROGRAM S1 PGSD DAN S1 PGPAUD UNIVERSITAS TERBUKA
Get PDFThe online tutorials for undergraduatestudents at Universitas Terbuka has 30% of contributions to the grade of the final exam, which is why students are expected not to depend solely on independent learning without any supporting facilities. With 339 undergraduate students of SIPAS NON-TTM PGSD and PGPAUD, the researcher used the unified theories of acceptance and use of technology to analyze students acceptance and technology usage, and using multiple regression as the statistical tools to test out the influence of performace expectancy, effort expectancy, social influence, and facilitating conditions towards the behavioral intention of undergraduate students of PGSD and PGPAUD in using online tutorials.It was found that facilitating conditions had the most significant influence towards behavioral intention, while performance expectancy was right after. Lower influence was found in social influence, while the effort expectancy doesn't have any significant effect on behavioral intention of undergraduate students of PGSD and PGPAUD in using online tutroials
METODE ANALISIS KOMPONEN INDEPENDEN DAN PENGGUNAANNYA PADA DEKOMPOSISI SINYAL ELEKTROENSEFALOGRAFI
Get PDFIndependent component analysis (ICA) is a multivariate statistical method that is used to find factors or independent component from the data. ICA is a further development of factor analysis (FA). The different of ICA to FA is that in FA the distribution of the data is assumed to be normal (gaussian) while it is non-gaussian in ICA. In this paper we will elucidate ICA shortly from the formulation of the problem, the linear modeling of the problem, the solution of the problem through maximum likelihood method and information theory approach, to the formulation of computational algorithm through neural network optimalization of weight matrix. Since one of the common application of ICA is in analysis of biomedical signal, in this paper we will give an illustration of decomposition of electroencephalographic signals in to independent components. This action could help researchers or cliniciansto differentiate brain activities from artifact such as mucles of heart activities. The data samples are taken from open source EEG dataset and would be analyze with EEGLAB which is an open source extension module to Matlab.
Analisis komponen independen (AKI) merupakan metode statistik multivariat yang digunakan untuk menemukan faktor atau komponen independen dari suatu data. AKI merupakan pengembangan lebih lanjut dari analisis faktor (AF). Perbedaannya AKI dengan AF ialah komponen diasumsikan berdistribusi normal (gaussian) pada AF, sedangkan pada AKI komponen diasumsikan berdistribusi non-gaussian. Pada makalah ini akan dipaparkan secara singkat AKI mulai dari perumusan masalah yang memunculkan metode AKI serta permodelan linear yang dihasilkan, pemecahan masalah linear tersebut melalui metode maximum likelihood (ML) dan pendekatan teori informasi, hingga formulasi algoritma komputasi melalui pendekatan optimalisasi matriks beban pada model jaringan syaraf. Karena salah satu penerapan AKI adalah pada analisis sinyal biomedis, dalam makalah ini akan disajikan ilustrasi dekomposisi sinyal elektroensefalografi (EEG) ke dalam komponen independen. Tindakan ini dapat membantu peneliti atau tenaga medis dalam membedakan mana sinyal dari otak dan mana yang merupakan artefak seperti sinyal dari aktivitas otot atau jantung. Data yang digunakan berupa data set EEG sumber terbuka dari daring yang kemudian dianalisis dengan menggunakan perangkat lunak EEGLAB yang merupakan modul tambahan atas perangkat lunak Matlab
KONTRIBUSI USAHA MIKRO KECIL DAN MENENGAH TERHADAP TINGKAT PERTUMBUHAN PENDAPATAN DAERAH PROVINSI DKI JAKARTA
Get PDFThis study aims to analyze the potential and contribution of retribution revenue from the City Administration Government of Central Jakarta, East Jakarta, and South Jakarta to the total DKI Jakarta Original Regional Revenue (PAD). This study uses primary data and secondary data. Qualitative descriptive analysis method focused on the development strategy of MSME business empowerment in the form of retribution income performance based on purposive sampling and literature study with Growth analysis testing tools and Share analysis. Growth rate (Growth) Temporary Location retribution income (LokSem) and Patronage Locations (LokBin) in the city government The administration of South Jakarta, Central Jakarta, and East Jakarta has fluctuated every month. Total revenue retribution (Loksem and Lokbin) Administrative City Administration of South Jakarta, Central Jakarta, and East Jakarta does not have a large influence on the total Regional Original Revenue (PAD) of DKI Jakarta Province in 2016.In order to improve the performance of retribution, it can be concluded that the strategy in the form of a Performance SOP and Performance Accountability Report (LPJK) in each month has an integrated Management Information System for all SME & Trade Sub-Centers in DKI Jakarta, analyzing 5 C (Capital, Collateral, Character, Capacity , and Condition) and 7 P (Personality, Party, Purpose, Prospect, Payment, Profitabillity, and Protection).
Penelitian ini bertujuan untuk menganalisis potensi dan kontribusi pendapatan retribusi dari Pemerintah Kota Administrasi Jakarta Pusat, Jakarta Timur, dan Jakarta Selatan terhadap total Pendapatan Asli Daerah (PAD) DKI Jakarta. Penelitian ini menggunakan data primer dan data sekunder. Metode analisis deskriptif kualitatif yang difokuskan pada strategi pengembangan pemberdayaan usaha UMKM dalam bentuk kinerja pendapatan retribusi yang berdasarkan purposive sampling dan studi kepustakaan dengan alat uji analisis Growth dan analisis Share. Tingkat pertumbuhan (Growth) pendapatan retribusi Lokasi Sementara (LokSem) dan Lokasi Binaan (LokBin) di Pemerintah kota Administrasi Jakarta Selatan, Jakarta Pusat, dan Jakarta Timur mengalami fluktuatif tiap bulannya. Total pendapatan retribusi (Loksem dan Lokbin) Pemerintah Kota Administrasi Jakarta Selatan, Jakarta Pusat, dan Jakarta Timur tidak memiliki pengaruh yang besar terhadap total Pendapatan Asli Daerah (PAD) Provinsi DKI Jakarta di Tahun 2016. Guna meningkatkan kinerja retribusi, dapat disimpulkan strategi berupa Terdapat SOP Kinerja dan Laporan Pertanggung Jawaban Kinerja (LPJK) di tiap bulannya, memiliki Sistem Informasi Manajemen terpadu bagi seluruh Sudin UKM & Perdagangan di DKI Jakarta, melakukan analisa 5 C (Capital, Collateral, Character, Capacity, and Condition) dan 7 P (Personality, Party, Purpose, Prospect, Payment, Profitabillity, and Protection)
KEHADIRAN SOSIAL DALAM PEMBELAJARAN DARING BERDASARKAN SUDUT PANDANG PEMBELAJAR PENDIDIKAN TERBUKA DAN JARAK JAUH
Get PDFThis research describes whether the social presence can be obtained from online learning of distance education setting. Data in this study employed questionnaire adapted from Rovai (2002) which identified 3 aspects of social presence, namely connectedness aspect, learning aspect, and socio-emotional aspect. Data was taken from 60 students who participated in an 8-weeks online learning. The results showed that all aspects have positive attitudes from students’ point of views. The students experienced connectedness aspect, learning aspect, and socio-emotional aspect in online learning regardless the learning situation which was mostly text-based setting
DIMENSI KEMISKINAN DI WILAYAH PESISIR PADA KABUPATEN INDRAGIRI HULU PROVINSI RIAU
Get PDFThis purpose of this study to analyze the poverty of the region in Indargiri Hilir regency. This study uses panel data. The data used in this study results of Podes survey in 2003, 2006, 2008, 2011 and 2014. The sample used amounted to 465 villages. The results of variables of electric users, TVRI users, hospital distance to the village and access to hospitals have negative and significant value, indicating more and more people use electricity, TVRI and access to hospitals will reduce poverty. While the river variables for crossing between villages and rivers for transportation have positive and insignificant values, indicating that the more rivers for transportation the more poverty will increase.
Tujuan menganalisa kemiskinan di daerah di Kabupaten Indragiri Hilir. Penelitian ini menggunakan data panel. Data yang digunakan dalam penelitian ini hasil survei Podes tahun 2003, 2006, 2008, 2011 dan 2014. Sampel yang digunakan berjumlah 465 desa. Hasil penelitian Variabel pengguna listrik, pengguna TVRI, Jarak rumah sakit ke desa dan akses rumah sakit mempunyai nilai negatif dan signifikan, yang menandakan semakin banyak masyarakat menggunakan listrik, TVRI dan akses rumah sakit maka akan mengurangi kemiskinan. Sedangkan variabel sungai untuk melintas antar desa dan sungai untuk transportasi mempunyai nilai positif dan tidak signifikan, yang menandakan bahwa semakin banyak sungai untuk transportasi maka kemiskinan akan semakin meningkat
KAJIAN KEPUASAN MAHASISWA TERHADAP LAYANAN PROSES PEMBELAJARAN JARAK JAUH PADA PROGRAM STUDI D2 PERPUSTAKAAN
Get PDFUniversitas terbuka is one of university in Indonesia that implement a remote and open learning system. Learning distance requirements are not carried out by using media, both print (module) and non-print (audio/video, computer/internet, radio broadcasting, and television). To serve students spread throughout Indonesia, excellent service is required. UT continues to increase its commitment to promoting academic quality and one of the academic qualities that need to be improved is the learning process where in the learning process there are general service aspects, aspects of registration services, tutorial service aspects, either TTM tutorials or online tutorials (TUTON), practicum services, services teaching materials, Online Bookstore services (TBO), SIPAS services and aspects of service for administering examinations. This study is intended to determine the level of satisfaction of students, especially D2 Library students of FISIP-UT Library, to the services provided by UT. The method used is quantitative and qualitative methods. The results of the assessment of satisfaction and importance are ≥ 50% of students are satisfied and feel an interest in the various services provided by UT
PENENTUAN HARGA OPSI BELI ATAS SAHAM PT. ANTAM (PERSERO) MENGGUNAKAN MODEL BINOMIAL FUZZY
Get PDFOption is a financial instrument where price depends on the underlying stock price. The pricing of options, both selling options and purchase options, may use the CRR (Cox-Ross-Rubinstein) binomial model. Only two possible parameters were used that is u if the stock price rises and d when the stock price down. One of the elements that determine option prices is volatility. In the binomial model CRR volatility is constant. In fact, the financial market price of stocks fluctuates so that volatility also fluctuates. This article discusses volatility of fluctuating stock price movements by modeling it using binomial fuzzy with triangular curve representation. The analysis is carried out in relation to the existence of three interpretations of the triangular curve representation resulting in different degrees of membership. In addition to volatility, this study added the size or risk level Ï. As an illustration, this study used stock price movement data from PT. Antam (Persero) from August 2015 until July 2016. The results of one period obtained from the purchase price option for August 2016 with the largest volatility, medium and smallest respectively were Rp.143,43, Rp.95,49, and Rp.79,00. There was calculated at the risk level of Ï = 90%. The degree of membership for each option price varies depending on the interpretation of the triangle curve representation.
Opsi merupakan instrumen keuangan yang harganya tergantung pada harga saham yang mendasarinya. Penentuan harga opsi, baik opsi jual maupun opsi beli dapat menggunakan model binomial CRR (Cox-Ross-Rubinstein). Dalam model ini hanya dimungkinkan adanya dua parameter yaitu u apabila harga saham naik dan d pada saat harga saham turun. Salah satu unsur yang menentukan harga opsi adalah volatilitas. Dalam model binomial CRR digunakan volatilitas yang bersifat konstan. Padahal, pada pasar keuangan pergerakan harga saham mengalami fluktuasi sehingga volatilitas juga menjadi fluktuatif. Artikel ini membahas volatilitas pergerakan harga saham yang fluktuatif dengan memodelkannya menggunakan binomial fuzzy dengan representasi kurva segitiga. Analisis dilakukan terkait dengan adanya tiga interpretasi terhadap representasi kurva segitiga tersebut yang menghasilkan derajat keanggotaan yang berbeda. Selain volatilitas, dalam penelitian ini ditambahkan ukuran atau tingkat risiko Ï. Sebagai ilustrasi, digunakan data pergerakan harga saham PT. Antam (Persero) dari Agustus 2015 hingga Juli 2016. Hasil penelitian dengan perhitungan satu periode diperoleh hasil harga opsi beli untuk bulan Agustus 2016 dengan volatilitas terbesar, menengah, dan terkecil masing-masing adalah Rp.143,43, Rp.95,49, dan Rp.79,00 yang dihitung pada tingkat risiko Ï = 90%. Derajat keanggotaan untuk masing-masing harga opsi berbeda-beda tergantung pada interpretasi dari representasi kurva segitiga