Aplikasi Karakteristik Penyearah Satu Fase Terkendali Pulse Width Modulation (Pwm) Pada Beban Resistif

Penyearah adalah alat untuk mengubah tegangan bolak Balik menjadi tegangan searah.Penerapan penggunaan rectifier dalam industri secara luas sebagai Uninterruptible Power Supply(UPS), pengaturan tegangan konstan, penggerak kecepatan motor, perbaikan faktor daya. Satuphasa terkendali penyearah menggunakan metode Pulse Width Modulation (PWM) adalah salahsatu jenis penyearah yang tegangan keluaran yang dikendalikan dengan perbaikan faktor daya.Eksperimen dilakukan dalam dua kasus variable yaitu, pada beban konstan dengan teganganinput variatif dan variabel beban dengan tegangan masukan konstan.Kedua penelitian menunjukkan bahwa satu phasa terkendali penyearah menggunakan metodePulse Width Modulation (PWM) menjaga tegangan sumber dan ouput akan konstan efektifmeskipun beban variati

Efek Penggunaan Scr Motor Controller Untuk Peningkatan Efisiensi Pada Motor Induksi Tiga Fasa

AC Induction motors are sized for maximum load and are operated at a constant full speed, because they are supplied with power from AC lined at a fixed-sinusoidal voltage and fixed frequency. However, load of motor does not always same at many conditions but the input voltage and power of motor is fixed. Of course, it will influence the efficiency of the motor. One method to improve efficiency of the motor is varying the voltage as loaded its and called Motor Controlled. Motor Controlled is AC Drive that using SCR (Silicon Controlled Rectifier) as the output voltage controller by controlling the firing angle. By employing SCR Motor Controller that adjust the voltage of the motor offers advantageous to improve efficiency of motor and potential for significant energy savings

Watak Harmonik Pada Inverter Tiga Fasa Tak Berbeban

Harmonic is one of sinusoidal components, one wave period from which having multiple frequency of its fundamental frequency one, leading to electrical power quality problems. Harmonic distortion in term of voltage and current ones, generally is due to non linier impedance. Inverter is one of example of it. There are some items that will be measured. There are value ofharmonic at source and value of voltage and current harmonic when inverter does not have any load. IEEE Standard of 519-1992 as a reference in determining maximum limitation voltage and current harmonics. The result of the tests wereshowed that voltage harmonic distortion at inverter did not exceed the IEEE 519-1992 maximum limitation of 5%. Whilecurrent harmonic distortion had exceed the maximum limitation of the IEEE 519-1992. The highest results were exceeding56,55 % when inverter does not have any load

Pengembangan Modul Matematika Berbasis Etnomatematika untuk Meningkatkan Kemampuan Pemecahan Masalah Siswa

Penelitian ini bertujuan untuk mendeskripsikan: Kevalidan Modul Matematika Berbasis Etnomatematika yang dikembangkan, Kepraktisan Modul Matematika Berbasis Etnomatematika yang dikembangkan, Efektivitas modul matematika berbasis etnomatematika yang dikembangkan. Penelitian ini merupakan penelitian pengembangan. Penelitian ini dilakukan melalui dua tahap, yaitu tahap pertama pengembangan modul matematika berbasis etnomatematika menggunakan model Borg and Gell, dan tahap kedua mengujicobakan modul matematika berbasis etnomatematika yang dikembangkan di kelas X IIS 2 SMA Negeri 1 Kaway XVI untuk melihat efektivitasnya. Dari hasil uji coba I dan uji coba II diperoleh: Modul Matematika Berbasis Etnomatematika yang dikembangkan memenuhi kriteria valid yaitu rata-rata skor 4,5 dengan tingkat kevalidan 4 16≤Va<5"> berdasarkan hasil validasi para ahli, Modul Matematika Berbasis Etnomatematika yang dikembangkan efektif ditinjau dari ketuntasan belajar siswa secara klasikal sebesar 85% melalui uji Coba II dan ketuntasan tujuan pembelajaran, kepraktisan modul matematika melalui angket respon positif siswa terhadap modul matematika berbasis etnomatematika yang dikembangkan mendapatkan respon postif

Sistem Deteksi Dini Banjir Berbasis Sensor Float Magnetic Level Gauge

Central Sulawesi has tropical climate conditions with interconnected rivers caused each of it can experience the impact of the sudden rise of water levels if there is a heavy rainfall in upstream areas which is commonly called “a sent flood”. Therefore, it is needed an early detector flood tool that works based on the height of river water level so that the impact of floods can be minimized. Early detector flood tool can function automatically by giving early warning when water levels reach a certain limit. The detector of height levels of river streams is designed using float magnetic level gauge method. This height level of river streams detector is able to provide information in real time based on the height level of river streams by giving information in the form of warning light indicator and siren alarm as alert and danger sign

Manajemen Mutu dalam Penyelenggaraan Pendidikan

Latar belakang penelitian ini adalah pengelolaan untuk standar proses belum optimal dilaksanakan dengan baik, dan pengelolaan standar tenaga pendidik dan kependidikan belum maksimal diantaranya guru masih banyak tidak menguasai dalam penggunaan Teknologi Informasi (TI) sebagai sarana pendukung pembelajaran.Tujuan penelitian ini adalah untuk mengetahui perencanaan, pelaksanaan, dan pengawasan manajemen mutu dalam penyelenggaraan pendidikan di SMPN 1 Karawang Barat. Penelitian ini menggunakan pendekatan kualitatif dengan metode studi kasus yakni penelaahan secara empiris yang menyelidiki suatu gejala dalam latar kehidupan nyata. Hasil penelitian menunjukkan bahwa manajemen mutu dalam penyelenggaraan pendidikan di SMPN 1 Karawang Barat sudah dilakukan berdasarkan fungsi-fungsi manajemen. Perencanaan manajemen mutu dalam penyelenggaraan pendidikan di SMPN 1 Karawang Barat mengacu kepada standar pengelolaan pendidikan yang menjadi ketetapan Badan Standar Nasional Pendidikan (BSNP) sehingga mencerminkan standar pengelolaan yang unggul dan berdaya saing. Pelaksanaan program pengelolaan pendayagunaan pendidik dan tenaga kependidikan yaitu melalui MGMP, workshop, in house training, pelatihan-pelatihan, penerapan sistem reward and punishment yang jelas bagi Guru, Tenaga Kependidikan dan Siswa. Pengawasan dan evaluasi terhadap manajemen mutu pendidikan pada SMPN 1 Karawang Barat adalah terkait input seperti sarana prasarana, peserta didik, tenaga pendidik, pembiayaan dan lain-lainnya belum sesuai dengan standar yang diharapkan untuk mencapai kualitas pendidikan

Pemilihan Tipe Pembangkit Listrik Tenaga Gelombang Laut Tipe Pelampung di Pantai Salubomba Kabupaten Donggala

Indonesia is a country that has an area of sea three times larger than the land area. In line with the rapid development, the need for electricity is also increasing. So that Indonesia has great potential to produce alternative and environmentally friendly energy, namely Sea Wave Energy. Its continuous nature is available all the time. Many potential coastal areas in Indonesia, however, have not been utilized optimally. The purpose of this study is to see the potential of Wave Energy for electricity. For this reason, research was carried out at a location in the Central Sulawesi area, precisely in Salubomba, Central Banawa District, Donggala Regency. In this study a potential study was conducted on 3 types of PLTGL, namely Buoy, OWC, and Pasut Dam, where one will be chosen that meets the wave criteria requirements on the Beach. From the results of research, PLTGL that fulfills the requirements is the type of buoy. Data collection begins with secondary data, namely wind data from Mutiara Station. Then proceed with calculating wave forecasting using the SMB (Sverdrup Munk-Bretschneider) method. The results of this study, Salubomba beach has the potential to be built by the Buoy Type Wave Power Plant, a significant wave height of 0.52 - 3.37 meters with a ruptured depth of 3.95 meters

ISARIC-COVID-19 dataset: A Prospective, Standardized, Global Dataset of Patients Hospitalized with COVID-19

The International Severe Acute Respiratory and Emerging Infection Consortium (ISARIC) COVID-19 dataset is one of the largest international databases of prospectively collected clinical data on people hospitalized with COVID-19. This dataset was compiled during the COVID-19 pandemic by a network of hospitals that collect data using the ISARIC-World Health Organization Clinical Characterization Protocol and data tools. The database includes data from more than 705,000 patients, collected in more than 60 countries and 1,500 centres worldwide. Patient data are available from acute hospital admissions with COVID-19 and outpatient follow-ups. The data include signs and symptoms, pre-existing comorbidities, vital signs, chronic and acute treatments, complications, dates of hospitalization and discharge, mortality, viral strains, vaccination status, and other data. Here, we present the dataset characteristics, explain its architecture and how to gain access, and provide tools to facilitate its use