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Toughness and Fracture Surface of Frame of Drone Based on Composite from Waste Materials Mastariyanto Perdana; Rozi Saferi; Putri Pratiwi
Jurnal Teknik Mesin (JTM) Vol 9, No 2 (2019)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

Application of green composites material is aerial egineering. Advantages of green composites material are lightweight and relatively strong. This reason that makes green composites can be applied in Unmanned Aerial Vehicle (UAV). In this study, material of quadcopter frame was composites material that made of waste material from styrofoam, bagasse and eggshell. Styrofoam was used as binder of composite material. Bagasse and eggshell was used as reinforcement in green composite material. The investigation focused on effect of volume fraction on flying time of quadcopter that made of green composites material. This study showed that addition of eggshell powder in composites up 25% by volume fraction, result in decreasing the flying time of quadcopter. Addition of eggshell powder in composites up 25% by volume fraction,  result in decreasing the porous of green composite. Porous structure affect the flying time of quadcopter based on green composite materials that made of waste material from styrofoam, bagasse and eggshell. Green composite based on styrofoam, bagasse and eggshell can be applied in Unmanned Aerial Vehicle (UAV) materials.
Pengaruh Budaya Organisasi dan Pemberdayaan terhadap Komitmen Organisasi dalam Meningkatkan Kinerja Putri Pratiwi
Jurnal Ilmiah Aset Vol 14 No 1 (2012): Jurnal ASET Volume 14 No 1
Publisher : STIE Widya Manggala

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Abstract

The purpose of this study was to determine the influence of organizational culture on organizational commitment, the influence of employee empowerment on organizational commitment, the influence of organizational culture on employee performance, the effect of empowerment on employee performance and the influence of organizational commitment to employee performance. This studys population was employees. This study used survey methods, sampling and questionnaires as primary data collection tool. The sample used was simple random sampling. The samples used as many as 109 respondents with data analysis using Structural Equation Modeling (SEM). The results showed that there was significant influence of organizational culture and employee empowerment on organizational commitment whereas the level of the organizational culture variables, variable of employee empowerment and organizational commitment were less in affecting employee performance variables.
DEVELOPMENT OF ADOBE FLASH CS6-BASED LEARNING MEDIA ON ARTHROPODE MATERIALS Putri Pratiwi; Elida Hafni Siregar
Jurnal Pelita Pendidikan Vol 9, No 4 (2021): Jurnal Pelita Pendidikan
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpp.v9i4.25842

Abstract

This study aims to develop learning media based on Adobe Flash CS6 on Arthropod material and produce appropriate learning media based on the assessments of material experts, media experts, and students. This research applies a 4-D development model using. Each learning media validator consists of two material experts and two media experts. The small group trial subjects were 26 biology students, while the significant group trial subjects were 78 biology education students. The research data was obtained from a questionnaire on the feasibility of learning media from material experts, media experts, and student response questionnaires. The data obtained were analyzed by descriptive analysis techniques. The results showed that the validation of material experts and media experts obtained an average value of 97.5 and 102.5, respectively, in the very feasible category. The small group trial and large group trial results obtained an average value of 93 and 104.1, respectively, in the very feasible category. The resulting learning media is declared valid and very suitable to be used as a learning medium for biology students at the State University of Medan on Arthropoda material.
PERAN SEKOLAH DALAM SOSIALISASI POLITIK SISWA DI SMA NEGERI 1 PURWODADI Putri Pratiwi; Yuwanto .; Wiwik W
Journal of Politic and Government Studies VOLUME 4, NOMOR 2, TAHUN 2015
Publisher : Journal of Politic and Government Studies

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Abstract

AbstractPolitical socialization process is a process to help individual developmentbecome social beings who can adapt well in the society, become good citizens andunderstand their rights and obligations as citizens. School is a venue for theeducational process and part of the political socialization process either directly orindirectly. The overview of process and the result the political socialization inschool, especially in SMA N 1 Purwodadi can be seen from direct politicalsocialization that occurs active learning process in the classroom and indirectpolitical socialization can be seen become a member of an organization in theschool.This research is descriptive quantitative research. The method is surveyresearch method. Survey research method is a research that takes sample fromeone population and using the questionnaire as a primary data collection tool.Based on the results of research on political socialization process inSMAN 1 Purwodadi namely through intrakurukuler activities carried out in theclassroom based civic education curricula related to political issues . In additionthrough intra also performed ekstrakurukuler activities undertaken outside theclassroom such as student council and Scout , with lectures, discussions andsimulations . The material covered is matters related to political issues . Throughboth intra and extra-curricular activities , based on the results of the countingprocess of political socialization in SMAN 1 Purwodadi with an average successrate is as follows : good senagt 37.97 percent , 39.74 percent good , good enough16.00 percent and less either 6.29 percent .In order to create a conducive atmosphere in the government , theadministration and maturation cra understanding of political thinking for theyoung generation is very important . Starting from these objectives in the processof political socialization of the young generation will be more effective if done inschool with a special material that discusses the politics of knowledge containedin the educational curriculum .Keywords : Political socialization, students, SMA N 1 Purwodadi
Design of a Semi-Inverse Taper Horizontal Blade Wind Turbine and Its Potential use at Gajah Beach Padang Putri Pratiwi; Frizky Yurian
Jurnal Teknik Mesin Vol 11 No 1 (2021): Jurnal Teknik Mesin Vol.11 No.1 April 2021
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (975.621 KB) | DOI: 10.21063/jtm.2021.v11.i1.74-79

Abstract

The development of the use of wind energy to produce electrical is still quite attractive, especially in developing country such as Indonesia. Padang City is an area located on the west coast of Indonesia and is influenced by west, southwest, northwest winds with low wind with speeds ranging from 2 m/s to 10 m/s. The purpose of this research is to design a blade that can rotate in that speed range. The blade designed is a semi-inverse taper with a chord ratio of 1:1,3, the length of the blade is 90 cm. The design showed that the highest peak was found at 51% at TSR 4.5. Assuming a maximum generator speed of 500 rpm and the range of wind speeds from 1 m/s to 12 m/s, it is known that the blades begin to rotate at 2.1 m/s, the maximum power is 1324 Watts when the wind speed is 12 m/s
Aktivitas Antibakteri Ekstrak Etanol Daun Sembung Rambat (Mikania micrantha Kunth): Aktivitas Antibakteri Ekstrak Etanol Daun Sembung Rambat (Mikania micrantha Kunth) Santi Perawati; Lili Andriani; Putri Pratiwi
CHEMPUBLISH JOURNAL Vol. 3 No. 2 (2018): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (155.375 KB) | DOI: 10.22437/chp.v3i2.5554

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ABSTRAK Daun sembung rambat secara tradisional digunakan sebagai obat luka.Oleh karena itu diduga tumbuhan tersebut berpotensi sebagai antibakteri. Tujuan penelitian ini adalah untuk mengetahui potensi daun sembung rambat sebagai antibakteri Staphylococcus aureus. Serbuk daun sembung rambat dimaserasi dengan etanol 70%, dilanjutkan dengan uji fitokimia. Kemudian dilakukan uji aktivitas antibakteri menggunakan metode cakram terhadap bakteri Staphylococcus aureus variasi konsentrasi 5%, 15%, dan 25%. Dari hasil maserasi didapatkan rendemen sebesar 9,37%. Uji fitokimia positif mengandung alkaloid, flavonoid, polifenol, saponin, dan steroid. Uji aktivitas antibakteri Staphylococcus aureus memiliki kategori daya hambat kuat pada semua konsentrasi. Ekstrak daun Sembung Rambat memiliki aktivitas antibakteri yang kuat terhadap bakteri Staphylococcus aureus. Kata Kunci: Mikania micrantha Kunth; uji fitokimia; antibakteri; Staphylococcus aureus
PENGARUH METODE PERMAINAN ULAR TANGGA TERHADAP HASIL BELAJAR SISWA PADA SUBTEMA ORGAN TUBUH MANUSIA DAN HEWAN DI KELAS V SD NEGERI 40 BANDA ACEH Putri Pratiwi; Alfiati Syafrina; Israwati Israwati.
Jurnal Ilmiah Mahasiswa Pendidikan Guru Sekolah Dasar Vol 3, No 4 (2018): JIM VOL 3 NO 4 OKTOBER 2018
Publisher : Jurnal Ilmiah Mahasiswa Pendidikan Guru Sekolah Dasar

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Abstract

Siswa sekolah dasar masih sangat erat hubungannya didalam dunia bermain, sedangkan belajar untuk siswa sekolah dasar sangat dituntut. Dalam proses belajar pada siswa sekolah dasar sangat bisa dihubungkan antara belajar dan bermain. Salahsatu alternatif yang dilakukan untuk  dapat meningkattkan hasil belajar adalah dengan menerapkan metode permainan Ular Tangga, yaitu proses pembelajaran sambil bermain. Penelitian ini berupaya meningkatkan hasil belajar siswa berdasarkan penilain pada pembelajaran kurikulum 2013. Sehingga penelitian inikkah bertujuuan untuk mengetahui pengaruh penerapan metode permainan Ular Tangga terhadap hasil belajjar siswwa pada Subtema Orggan Tubuh Maanusia dan Hewwan di kelas Vb SD Negerii 40 Banda Aceh.            Pendekkatan yang akan diggunakandidalam penelitian ini  kuanttitatif. Teknik pengolahan data  digunakan uji-t. Jenis penelitian eksperimen semu atau Pre Experimental Designs dengan model One Grroup Pretest Posttest Design. Poppulasipada dalam peenelitian ini adalah kelas V SD Negeri 40 Banda Acehh yang terrdiri dari dua kelas yaitu Va 28 siswa dan Vb 26 siswa sehingga jumlah populasi adalah 54 siswa. Teknik untuk menngambill sampelnya adallah dengan Sampling Purposive. Sampel di dalam penelitian ini sebanyak 26 siswa di kelas Vb. Teeknik pegumpulan data tersebut akan dilakukan denggan memberikan tes soal berbentuk choice berjumlah 25 butir pada subtema organ tubuh manusia dan hewan pembelajaran 2 dan pembelajaran 5.            Hasil penelitian menunjukkaaan bahwa pada taaaraf signnifikan α = 0,05 dan dk = n₁ + n₂ - 2 = 26 + 26 – 2 = 50 maka daftar dalam distribussi t dengan  =  sehingga diperolehkan = 1,67 karena  ˃ , yaitu 12,4 ˃ 1,67. Dengan demikian  ditolak dan H₁ diterima, sehingga metode permainan Ular Tangga yang diajarkan subtema organ tubuh manusia dan hewan pembelajaran 2 dan pembelajaran 5 di kelas Vb dapat mempengaruhi haasil belajar peserta diddik ini. Dengan demiikian dapat disimpulkan bahwasannya penerapan metode permainan Ular Tangga ini berpengaruh terhadap hasiil belajjar siswanya pada subtema orgganan tubuh manusiia dan hewan dii kelas V SD Negeri 40 Banda Aceh.
Production Process of Steam Power Plant and Calculation of Thermal Efficiency: Case Study of Teluk Sirih Steam Power Plant Putri Pratiwi; Zakil Hadi
Jurnal Teknik Mesin Vol 12 No 1 (2022): Jurnal Teknik Mesin Vol.12 No.1 April 2022
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2022.v12.i1.26-31

Abstract

The performance of a power plant can be known from the calculation of efficiency in the generating sector. Steam power plants utilize a series of energy conversion processes including: conversion of chemical energy into thermal energy when extracting heat from coal as fuel to heat boilers, conversion of thermal energy into mechanical energy in turbines and conversion of mechanical energy into electrical energy in generators. Like other steam power plants, the Teluk Sirih PLTU located in Bungus Teluk Kabung, West Sumatra has the same energy production process. it's just that the source of the water is taken from the sea so it requires special treatment to turn the water into water suitable for producing steam used in this power plant. The electricity production process will be explained in this study and an efficiency calculation process with a simple Rankine cycle is carried out to determine the efficiency of this power plant. From the calculation results, the thermal efficiency of PLTU Teluk Sirih is 29%. Based on the results of these calculations, it is known that the Telusk Sirih PLTU can be classified as a power plant with good efficiency.
PERANCANGAN APLIKASI GOIZUU UNTUK PEMBELAJARAN SHKYUU GOI Putri Pratiwi; Soni Mulyawan Setiana
MAHADAYA Vol 2 No 1 (2022): April 2022
Publisher : Fakultas Ilmu Budaya, Universitas Komputer Indonesia

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Abstract

This paper entitled “Goiizu Application Design for Shokyuu Goi Learning” is aimed to determine the design of the Goiizu application as a basic Japanese vocabulary learning or Shokyuu Goi. Goiizu Media was created using Adobe Flash Professional CS6. The method used in this research is the ADDIE model development method (Analysis, Design, Development, Implementation, and Evaluation). The explanation in Goiizu media design consists of several steps, such as the design of the opening display to the profile menu. Media Goiizu discusses basic Japanese vocabulary with material taken from the book NIHONGO KIRAKIRA Class X. The conclusion from this research is that the design of the Goiizu application for learning Shokyuu Goi vocabulary has been successfully carried out. Keywords: Goiizu, Adobe Flash, ADDIE, Application, Shokyuu Goi