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Ratna Wardani
IIK Strada Indonesia
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Metode Pengering Gabah Aliran Massa Kontinu Sebagai Pengering Alternatif Pada Musim Penghujan Dengan Sumber Energi Dari Cahaya Lampu Mono Kromatis Nusyirwan Nusyirwan
METAL: Jurnal Sistem Mekanik dan Termal Vol 2, No 1 (2018)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (940.912 KB) | DOI: 10.25077/metal.2.1.47-55.2018

Abstract

In the rainy season, rice grain from the harvesting field cannot be dried properly. This condition is due to sunlight being blocked up by the cloud therefore the sunlight intensity on the earth surface is small. As a consequence many farmers become loss because this low quality rice is sale at a lower price. To overcome the above problems, it is necessary to make a dryer that not directly depend on the solar energy. In this research, a method for rice drying using light from monochrome lamp is proposed. The dryer consist of a silinder-shaped container which is equipped whith a stirer that can be adjusted according to the desired speed. In the drying chamber, hot air that regulated in the drying room is produced by incandescent lamp. The drying result obtained from this dryer using 40 rpm rotation speed reaches an absolute dry percentage of rice at equivalent of 14 %. While for stirrer rotation 50 rpm and 60 rpm the drying percentage is 8 % and 5 %. From these results, it can be concluded that the best condition for the drying process is obtained for stirrer rotation speed 40 rpm.
Penghitungan Beban Kritis pada Struktur Balok-Kolom Akibat Pembebanan Secara Aksial dan Lateral Berbasiskan Metode Beda Hingga Eka Satria; N Nusyirwan; Deri Yunifki
METAL: Jurnal Sistem Mekanik dan Termal Vol 1, No 2 (2017): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (889.991 KB) | DOI: 10.25077/metal.1.2.117-124.2017

Abstract

This paper is aimed to determine the critical buckling load of the beam-column structures for practical applications. Firstly, the critical buckling loads is calculated numerically based on finite difference method. For geometrical modeling, the structures are supported in three types of supports; pinned-roller, fixed-free, and fixed-pinned. Then, a geometry of the beam is varied in variation of slenderness ratio. The load is given in types of uniform distribution load, q, laterally and a concentrated load, P, axially. Using a computational program, the relationships of P/q to slendernes ratio, l, for all models are determined. The results then are approached by regression technique of a least square method in order to find a the best fit of equation. This equation is recommended as a practical equation for determining the critical buckling of the beam-column structures under variation of types of supports, slenderness ratio and rasio P/q.
Online learning satisfaction in higher education: what are the determining factors? Sri Suhandiah; Fendy Suhariadi; Praptini Yulianti; Ratna Wardani; Yurilla Endah Muliatie
Jurnal Cakrawala Pendidikan Vol 41, No 2 (2022): Cakrawala Pendidikan (June 2022)
Publisher : LPMPP Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/cp.v41i2.35724

Abstract

Covid-19 pandemic crisis has required the implementation of comprehensive online learning in Indonesia, including in the higher education institutions. Changes in the conventional way of face-to-face learning to online one provide both positive and negative responses, which will affect student learning satisfaction. This research aims to determine student satisfaction with the online learning which is associated with perceived technological complexity, student learning experience, online learning readiness, and presence of lecturers in online learning activities. This research employed a quantitative approach. Data were collected utlizing a google online questionnaire distributed through a network of lecturers. The samples were 439 students from state and private higher education institutions spreading across eight islands in Indonesia. Statistical analysis utilized the Structural Equation Model (SEM) in Stata 15. The results show that online learning satisfaction is positively influenced by student experience, online learning readiness, and the presence of lecturers in online learning. Moreover, online learning readiness can mediate student experience and online learning satisfaction but unable to mediate technology complexity and online learning satisfaction. These findings add to the literature on online learning satisfaction and provide direction for the solution of problems on online learning satisfaction. The proposed suggestion to higher education institutions is to encourage the development of online-based collaborative models and to provide a continuous experience for students.
METODE PENURUNAN RESPON DINAMIK SISTEM POROS-ROTOR DENGAN PEREDAM VISCOUS ROTARY Nusyirwan Nusyirwan
Jurnal Ilmiah Teknik Mesin POROS Vol 12, No 2 (2014): Jurnal Ilmiah Teknik Mesin POROS
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (696.928 KB) | DOI: 10.24912/poros.v12i2.563

Abstract

Abstract: Viscosity or viscosity is one of the quantities that are very important in the analysis of the behavior and movement of fluids that come into contact with other objects such as solids {solid body). Viscous dampers can be used to reduce the amplitude of the response due to the unbalanced mass, rotation critically, noise and shock loads. Absorbers working with fluid film bearing securities which are placed at a certain point, which is connected to the shaft-rotating rotor. Certain viscosity fluid will be forced to pass through a narrow slit with a certain pressure that can absorb the energy supplied by the shaft, this damping effects that can provide resistance to the rotor shaft system because the fluid has a linear damping and damping effect histeriktik. Viscous dampers can be used to reduce vibration amplitude response at a fixed price in accordance with the physical nature of the damper, the use of viscous dampers are widely used to control engine speed and turbine rotational speeds are like a helicopter rotor. From the test we can produce the damping effect on the engine rotation can reduce the response time domain vibration with an amplitude reduction of approximately 60% for the damping ratio ζ = 0.5. 
Modern Wound Care Application: A Literature Review Khaerotib; Yuly Peristiowati; Ratna Wardani
International Journal of Science and Society Vol 3 No 1 (2021): International Journal of Science and Society (IJSOC)
Publisher : GoAcademica Research & Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (461.41 KB) | DOI: 10.54783/ijsoc.v3i1.295

Abstract

Wounds are damage to tissue structures and normal anatomical functions as a result of pathological processes originating from internal and external that hit certain organs. Wounds can be classified based on anatomical structure, properties, the healing process, and length of healing. The literature review aims to find out the modern application of the wound care-related wound healing process. Literature review through several stages, namely making questions, identification, eligibility, selection of article inclusion, and screening. The Selection Process is listed in the framework of the review literature and obtained the results of article 7 articles. The data showed different results adjusted to the system and the conditions of where the research was conducted. The results of the reviewed article focus on explaining the patient's comfort level and more significant healing process. Modern wound care application has been proven to provide comfort to patients in carrying out the wound healing process, and is very helpful for nurses in providing nursing services. The application of modern wound care is a wound care technique that will develop at any time based on the development of nursing science, in which case it focuses on the level of comfort of patients in receiving health services related to wound care. So nurses urgently need to improve and develop science related to the application of modern wound care that will support patient comfort in wound care and accelerate the wound healing process well.
PENENTUAN TAHANAN JENIS BATUAN ANDESIT MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER (STUDI KASUS DESA POLOSIRI) - Munaji; Syaiful Imam; Ismi Lutfinur
Jurnal Fisika Vol 3, No 2 (2013)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v3i2.3820

Abstract

Telah dilakukan penelitian untuk menentukan nilai resistivitas dan kedalaman batuan andesit di Desa Polosiri. Prinsip kerja metode geolistrik adalah mempelajari aliran listrik di dalam bumi dan cara mendeteksi di permukaan bumi. Metode tahanan jenis didasari oleh hukum Ohm, untuk mengetahui jenis lapisan batuan didasarkan pada distribusi nilai resistivitas pada tiap lapisan. Variasi harga tahanan jenis akan didapatkan jika jarak masing-masing elektroda diubah, sesuai konfigurasi alat yang dipakai (konfigurasi Schlumberger). Data hasil pengukuran di lapangan berupa beda potensial dan arus yang dapat digunakan untuk menghitung resistivitas semu. Penelitian ini dilakukan sebanyak tiga lintasan. Data hasil pengukuran diolah menggunakan software IPI2Win. Berdasarkan hasil penelitian diperoleh bahwa batuan andesit di Desa Polisiri memiliki resistivitas 212 Ωm – 300 Ωm dengan kedalaman 1.3 m - 1.86 m.
Microgrid Development Using a Grid Tie Inverter Santoso, Hartono Budi; Budiyanto, Budiyanto
Makara Journal of Technology Vol. 17, No. 3
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The use of renewable energy sources (RES), especially photovoltaic (PV), to meet the demand of electrical energy has been getting a great deal of attention as an alternative solution to electrical energy deficit problems. RES are being applied in power systems in a variety of configurations including microgrid systems. One of the characteristics of a microgrid is capability to supplying power to grid when there is an excess power to supply local load. This research examines the chances of saving power consumption from grid using power converters grid tie inverter (GTI) in a microgrid configuration. The test is done by using a zero load and power distribution methods. Test results show grid tie GTI capable of supplying electrical power to grid up to 98% of the input power converter. In the microgrid configuration power usage from grid can be reduced up to 91%, which should be supplied from the grid to load.
Movidius Neural Compute Stick for Real Time Detection of Human Objects with the Mobilenet-SSD Method Maulia Rahman; Dedi Leman
JOMLAI: Journal of Machine Learning and Artificial Intelligence Vol. 1 No. 3 (2022): September
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (534.913 KB) | DOI: 10.55123/jomlai.v1i3.1025

Abstract

The presence of surveillance cameras plays an important role in helping the process of monitoring and evaluating human activities in the monitored area. This ability can prevent or trace undesirable events such as criminal acts or some accidents that related to human activities. However, most of the surveillance camera that used nowadays only held a passive role in security that can lead to an increased potential risk of negligence by the guards (users) in the process of monitoring the activities that are happening. This study aims to design a system that is able to improve the performance of surveillance cameras in detecting and calculating numbers of human based on Movidius NCS on a Raspberry Pi device so that the camera can be active and be able to provide optimal results and reduce the use of excess space on the storage. The human object detection system that is used in this research applies Deep Learning technique with Mobilenet-SSD as its network architecture model. The research trials were carried out under various conditions of light intensity starting from 50-550 lux and distance to objects in range of 1-10 meters. The results showed that the accuracy obtained by the system was able to reach 91.67% with 49.24% of storage efficiency.
Penerapan Data Mining untuk Memprediksi Siswa Berprestasi dengan Menggunakan Algoritma K Nearest Neighbor Sri Widaningsih
JATISI (Jurnal Teknik Informatika dan Sistem Informasi) Vol 9 No 3 (2022): JATISI (Jurnal Teknik Informatika dan Sistem Informasi)
Publisher : Lembaga Penelitian dan Pengabdian pada Masyarakat (LPPM) STMIK Global Informatika MDP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35957/jatisi.v9i3.859

Abstract

The process of determining outstanding students at SMK Tunas Sinar Mandiri Cianjur is not only determined by academic scores, but considers several non-academic aspects such as gender, extracurricular activeness, presence, and personality. For academic scores, it is taken from the scores of productive subjects in class X and XI. To predict which student excel in class XII, data mining techniques can be applied using the k nearest neighbor (kNN) algorithm with k = 1. The stages of the data mining process follow the stages in Knowledge Discovery on Databases (KDD). This stage starts from selection, preprocessing, transformation, data mining, and evaluation / interpretation. The data transformation process uses the minimum method and the distance formula used is the euclidian distance. Making this data mining application follows the waterfall paradigm. From the results of the analysis and design using Unified Model Langunge (UML), several main pages were produced, namely managing student data, determining variables and variable weights. By applying this data mining techniqu it can make it easier for schools to prepare students who will get scholarships.
Implementasi Permenkes 65/2015 (Standar Pelayanan Fisioterapi) Dan Permenkes 43/2019 (Puskesmas) Wilayah Jawa Timur Fransisca Xaveria Hargiani; Ratna Wardani; Indasah Indasah; Rahmania Ambarika; Sentot Imam Suprapto
Jurnal Keperawatan Muhammadiyah Vol 7 No 3 (2022): JURNAL KEPERAWATAN MUHAMMADIYAH
Publisher : UNIVERSITAS MUHAMMADIYAH SURABAYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/jkm.v7i3.15001

Abstract

Objective:  To find out the implementation of Minister of Health Regulation 65/2015 regarding Physiotherapy Service Standards and Minister of Health Regulation 43/2019 regarding Health Centers (Puskesmas) in the East Java region Physiotherapy as a health worker is regulated in the Physiotherapy service standard at the Puskesmas. Health center regulations do not have physiotherapists.Methods: This study uses a descriptive qualitative method, aiming to get a general understanding of reality from the participant's perspective. through in-depth interviews with informants. Sampling is non-probability with the type of purposive sampling. The inclusion criteria were the Head of the City/Regency Health Office whose working area did not yet have physiotherapy services at the Puskesmas and was willing to be an informant. While the exclusion criteria were the Head of the City/Regency Health Office whose work area already had physiotherapy services at the Puskesmas and was willing to be an informant. Sources of data obtained from interviews with informants and secondary data through document studies. The interview included an understanding of the meaning of physiotherapy in relation to services at the Puskesmas. based on Permenkes 65/2015 and what is his opinion about the presence of physiotherapists in several health centers in East Java. Document studies were obtained from the laws and regulations concerning physiotherapy and Puskesmas. Results:  Most of the informants interpreted physiotherapy as health workers in referral services, namely hospitals and joined in rehabilitation services. Not all informants understand about physiotherapy services at the Puskesmas because in writing there are no physiotherapists in Permenkes 43/2019. Meanwhile, the understanding of rehabilitation is interpreted as secondary and even tertiary services. The services at the Puskesmas are primary services, which are more promotive and preventive. Informants are of the opinion that the presence of personnel in the Puskesmas depends on the policies of each region and also the needs.Addition of personnel at the Puskesmas has an impact on regional budgets and capabilities, besides there is no clear list of service activities.The study of the Permenkes 65/2015 document clearly states the existence of physiotherapy services at the Puskesmas, but in Permenkes 43/2019 it has not been clearly stated that there are physiotherapists.Conclusion:  The implementation of Permenkes 65/2015 concerning Standards for Physiotherapy Services, especially in Puskesmas in the East Java region is still very minimal, namely 62 out of 968 Puskesmas (6.4%). Permenkes 43/2019 regarding Puskesmas has not stated the presence of physiotherapists, so there is no synchronization of laws and regulations related to physiotherapy services.
Co-Authors - Munaji A. A. A. WULANDIRA SAWITRI DJELANTIK A.A. Ketut Agung Cahyawan W Abiddin, Andi Hayyun Abral, Hairul Agista Putri Agripina Alma Frida Paus Agung Adhitya Priahutama Agung Cahyono Agus Khoirul Anam, Agus Khoirul Agus Wahyudi Agusta Dian Ellina amalianurzahra Andi Kurniawan Andreas Iyai Andrei Sakharov Maryen Andriano G. Suban Yunior Ari Wahono ARI WAHYUDI Ari Widiyantoro Asep Mulyana Asepma Hygi Prihastuti Asis, Asis Baharta, Edwin Bima Jon Nanda Budi Minarno Budi Purwoko Budi, Gunawan Setiyo Byba Melda Suhita Byba Melda Suhita Caturwangi, Desak Ketut Chairatul Umamah Charles Bay Koda Cherie Dinah, Cherie Chrisleman Adi Putra Amalo Dendi Gusnadi Dendi Nur Ramadani Deri Yunifki Desma Legawa Devita Riafinola Dewi Ridhosari Dewi Ridhosari Didi Gayani Dimyati Ayatulloh Diyah Herowati Dwi Andi Numantris Dwi Widjanarko Dyah Ayu Yulyastuti Eka Ferawaty Eka Ferawaty Eka Satria Eko Darminto Eko Edy Susanto Eko Rahaman Kadir ELIHAMI, ELIHAMI Endah Pri Ariningsih Eni Rohma Wiyati Erlangga Mandala Sakti Ermilando Lobain Ernawatiningsih, Ni Putu Lisa Ery Olivianto Faisal Nays, Faisal Fanni Husnul Hanifa Farida Wahyu Utami Faris Azharuddin, Faris Fendy Suhariadi Firdhaus Hari Saputro Al Haris Firman Ridwan Fortunasari, Fortunasari Frafilius Don Bosko Manu Gusti Ayu Agung Mas Mahadewi Hanny Krissanti Hargiani, Fransisca Xaveria Hari Prasetyo umar Hartono Budi Santoso Hendery Dahlan, Hendery Heru Tjaraka Herya Putra Dharma husen husen I Putu Mega Saputra I. G. N. Wisnu Sudewa Ifmalinda Iin Suwandari Imania Halwa El Kariema Imelda Imelda Indasah Indri Iswahyudi, Indri Irayani, Ni Made Devi Irene Yuliana Edowai Ismi Lutfinur Istyarini Istyarini, Istyarini Jamilatul Munawarah Joko Prasetyo Kartika Rinakit Adhe, Kartika Rinakit Khaerotib Khairul Umam Khofidatur, Rofiah Kornelius Laga Waleng Kurnia Rakhman, Dedi La Ode Geo Lede Adju Leman, Dedi Leonardus Rivaldiy Ganggut Maria Longa Pegan Mimiet Ismurdijahmitra Muhammad Irfan Muhammad Putra Nahdlah Murni Murni Nanda Rahmad Ni Luh Putu Widhiastuti Ni Made Rai Juniariani Novi Kurniasari Novriansyah Novriansyah, Novriansyah Nur Rahma Nurdina Nurdina Nurwijayanti Paulus Matius Philipus Sinay Pramono Pramono Praptini Yulianti, Praptini Prian Gagani Chamdareno, Prian Prian Gagani Chamdareno, Prian Gagani Purnasari, Irma R Mutya Rachim, Alfa Setya Rahmania Ambarika Rahmat Alif A. Ratna Herawati Rattu, A. J.M. Resty Tallupadang Rifki Dermawan Ririt Ika Lestari Risanda Alirastra Budiantoro Riza Taufiq Rizki Maharani Rofi’ah, Jamilatur Rofiq Noorman Haryadi Rusdi Samsinar, Riza Sandu Siyoto Sandu Siyoto Sawqi Saad El Hasan Sentot Imam Suprapto Sentot Imam Suprapto Setyo Budi Susanto Shanty Chairani Silvia Anzhita Sinulingga, Anita Afriani Siti Aida Adha Taridala Siti Khotimah Sri Suhandiah Sri Wulan Handayani Stevanus SUGIYANTO Suhermin, Suhermin Sujarwanto Sujarwanto, Sujarwanto Sunardi, Dedi Sunaryadi Suratminingsih Suratminingsih Sutriyono Syamsurizal - - Thamrin Usman Titin Ekowati Tri Hari Wahyuningtyas Tri Ratna Fauziah Tri Retnoningsih Tutus Fibri Ulfa Tarbiati Ulfa Tarbiati Ulrikus Jeferius Naya Umboh, J. M.L. Unang Sunarya Usman Rianse WA KUASA Wa Ode Yusria, Wa Ode Wahyu Rusmitawati Weka Gusmiarty Abdullah, Weka Gusmiarty Widya Sastika Winarsih Yaya Rayadin Yenni Marlita Yenny Puspitasari Yosefina Peni Bean Yulianti Yulianti Yuly Peristiowati Yuly Peristiowati Yurilla Endah Muliatie, Yurilla Endah