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Aktivitas Fotokatalitik TiO2 yang Dilapiskan pada Polipropilena Berbentuk Lembaran dan Butiran Sutisna, Sutisna; Rokhmat, Mamat; Wibowo, Edy; Rahmayanti, Handika Dany; Khairurrijal, Khairurrijal; Abdullah, Mikrajuddin
Jurnal Matematika dan Sains Vol 22 No 1 (2017)
Publisher : Institut Teknologi Bandung

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

Abstract

The sheet and granule of polypropylene (PP) have been used as the support material for TiO2 catalyst. The TiO2 powder was coated to the polymer surface using a combination of electrostatic and heating methods (for the PP sheet) and thermal milling method (for PP granule). The photocatalytic testing of catalysts conducted on a 300 ml solution of Methylene Blue (MB) with initial concentration of 25 ppm. Under solar ilumination, the catalyst sheets have a higher photocatalytic activity than the catalyst granules.
Kajian Struktur Serat dan Porositas Masker Udara Rahmayanti, Handika Dany; Rahmawati, Rahmawati; Sustini, Euis; Abdullah, Mikrajuddin
Jurnal Fisika Vol 8, No 1 (2018)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v8i1.13966

Abstract

There are 6 brands of air masks on the market that are Evo med, Nexcare carbon, Nexcare daily, Indomaret, Borma and Evo club. All masks on the market have 3 layers. Based on the results of microscopy testing showed that the fiber diameter image of all mask brands in layer 2 is smaller than layer 1 and 3. Generally, all brands of masks show a uniform fiber size distribution. From the surface porosity measurements, Borma masks have a larger porosity than other masks in layers 1, 2 and 3 ie 60.64%, respectively; 42.95% and 63.58%. The results show that the difference in mask price in the market does not show the quality standards of different mask filters. Furthermore, the results of this study may contribute to the development of research on masks.
Penggunaan Image Tracking untuk Pengukuran Sifat Mekanik pada Kertas Munir, Rahmawati; Rahmayanti, Handika Dany; Amalia, Nadya; Viridi, Sparisoma; Abdullah, Mikrajuddin
Jurnal Fisika Vol 9, No 1 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v9i1.19393

Abstract

Berbagai metode karakterisasi telah digunakan untuk memahami sifat mekanik bahan dengan menggunakan metode yang canggih atau metode paling sederhana. Pada penelitian ini dikembangkan metode sederhana untuk menghitung modulus elastis dengan menggunakan image tracking pada kertas A4 (100 g) yang membengkok dengan menerapkan prinsip balok cantilever. Metode ini menggunakan software video tracker 4.94 (Open Source) yang dapat dioperasikan dengan OS Windows. Preparasi sampel dilakukan dengan memotong kertas berukuran 16 cm x 5 cm. Pengambilan gambar dilakukan dengan menvariasikan sudut kelengkungannya pada sampel berbentuk persegi panjang (diasumsikan homogen). Profil lentur balok cantilever pada kertas difoto menggunakan kamera digital. Tracking koordinat dilakukan pada beberapa titik di setiap segmen sampel. Kebergantungan elastisitas terhadap parameter densitas dan penampang balok cantilever juga menjadi dasar dalam mengembangkan metode pengukuran ini. Data penampang dan kerapatan berdasarkan gambar profil lentur setiap bahan yang diperoleh dapat digunakan untuk menghitung modulus elastisitasnya. Hasil penelitian ini dapat berkontribusi pada pengembangan penelitian tentang pengukuran sifat mekanik bahan.
Karakterisasi Sifat Mekanik Benang Wol dan Benang Kasur Rahmayanti, Handika Dany; Munir, Rahmawati; Sustini, Euis; Abdullah, Mikrajuddin
Jurnal Fisika Vol 9, No 1 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v9i1.19421

Abstract

Kajian mengenai karakteristik sifat mekanik benang merupakan hal yang sifatnya sederhana namun penting dilakukan demi berkembangnya penelitian mengenai serat dan benang. Pada penelitian ini digunakan dua jenis benang di pasaran yakni benang wol dan benang kasur. Karakterisasi meliputi kekuatan benang, elongasi, tenacity dan modulus Young. Berdasarkan hasil uji tarik didapatkan nilai kekuatan, elongasi dan tenacity dari benang. Nilai kekuatan benang wol berkisar 1269,09gram-1551,32gram. Dari kurva hasil uji tarik dapat diestimasi nilai modulus Young dari benang wol yang ada di pasaran yaitu 295 MPa-439 MPa. Sedangkan untuk hasil karakterisasi benang kasur di pasaran didapatkan bahwa benang mampu menahan beban maksimum 4794,12 gram-5895,45gram dan nilai modulus Young dari benang kasur didapatkan nilai 389,7MPa-495,29 MPa.
Analisis Kapilaritas Air pada Kain Ardiani, Septia; Rahmayanti, Handika Dany; Akmalia, Nurul
Jurnal Fisika Vol 9, No 2 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v9i2.21394

Abstract

Kajian mengenai kapilaritas serapan air pada kain merupakan hal yang sifatnya sederhana namun penting dilakukan untuk memberikan informasi kepada masyarakat mengenai karakteristik kain serta demi berkembangnya penelitian mengenai daya serap berbagai jenis kain. Pada penelitian ini digunakan enam jenis kain yaitu kain satin, kain flanel, kain katun, kain sifon, kain crepe, dan kain jersey. Pada pengujian kapilaritas serapan air pada kain, besaran fisika yang dianalisis adalah ketinggian dan kelajuan serapan air. Berdasarkan hasil uji kapilaritas pada kain didapatkan bahwa ketinggian serapan air sebanding dengan kelajuan serapan air. Kelajuan serapan air menunjukkan kapilaritas serapan. Nilai ketinggian serapan air tertinggi adalah kain flanel yakni berkisar 5,1±0,2 cm sedangkan ketinggian serapan air terendah adalah kain satin yakni 2,4±0,2 cm. Kain katun, sifon, dan jersey memiliki ketinggian serapan air yang hampir sama. Kapilaritas tertinggi adalah kain flanel sebesar 0,086 cm/s sedangkan kapilaritas terendah adalah kain satin sebesar 0,040 cm/s. Kain  katun, sifon, dan jersey memiliki kapilaritas serapan air yang sama yaitu 0.070 cm/s.
STUDY OF DEFECT ON 180 ML HDPE BOTTLES YOGURT PRODUCTS WITH SMC B11 EXTRUSION BLOW MACHINE AT PT X Tommy Prasetya Kana; Handika Dany Rahmayanti; HM Didik
Kreator Vol 4, No 1 (2021): Kreator
Publisher : Politeknik Negeri Media Kreatif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46961/kreator.v4i1.306

Abstract

The type of plastic packaging that is popular in the community is bottle packaging. The plastic material that is generally used to make plastic bottles is High Density Polyethylene (HDPE). The plastic bottle industry in Indonesia usually uses a blow molding process in its production process, where the blow molding process consists of injection blow molding, extrusion blow molding and stretch blow molding. The SMC B11 machine is one of the extrusion blow molding machines used to produce plastic bottle packaging. In producing workpieces, this machine still produces several products that are not in accordance with company standards, including in terms of production cycle times and product defects. Defects or defects that are often encountered include the appearance of spots, bent parison which causes the bottle to bend (the bottle body is thin one side) and blow pin which causes the thread to not fit.Keywords— Bottle, Plastic, Defect, Extrussion Blow Molding
ANALYSIS OF PAPER ABSORPTION FROM DRIED LEAVES AS POTENTIAL OF FUTURE ORGANIC SANITARY PADS Handika Dany Rahmayanti; Septia Ardiani; Nurul Akmalia
Jurnal Ilmiah Publipreneur Vol 7, No 1 (2019): Jurnal Ilmiah Publipreneur
Publisher : Politeknik Negeri Media Kreatif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46961/jip.v7i1.69

Abstract

The use of waste, as well as unused goods, becomes something that has a sales value which is very necessary to preserve the environment. One example is the use of dry leaf waste which can be transformed into goods of economic value to the people who use them. The transformation of dry waste into pulp is one of the efforts that can be made to overcome the waste problem. The pulp from the dried leaf waste can then be turned into a paper which can then be used as an alternative to sanitary pads.
PELATIHAN PENGGUNAAN PLATFORM GAMIFIKASI EDUKATIF GUNA PENGUATAN PENDIDIKAN DI ERA PANDEMI COVID 19 BAGI GURU SEKOLAH DASAR DAN MENENGAH DI KOTA DEPOK Khairunisa, Yuyun; Nurhasanah, Yeni; Tyas, Sari Setyaning; Ardiani, Septia; Rahmayanti, Handika Dany
Jurnal Abdi Insani Vol 9 No 1 (2022): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v9i1.489

Abstract

The use of distance learning technology (e-learning) needs to be addressed so that learning objectives can be achieved effectively even though the activities are not carried out face-to-face in the classroom. One way to increase the focus and interest of students in learning activities is the use of elements in games in e-learning learning media or also known as gamification. Most of the gamification platforms are licensed or paid, so Teachers have to pay extra. The solution to this problem is to provide teachers with training and mentoring on the use of the online gamification platform where the application is free and simple to use. The purpose of this community service activity is to introduce and improve the digital competence of teachers and educators in using online gamification platforms (on the network) as a learning medium. The method used in service activities is the method of training and mentoring. The results of this community service activity are in the form of stages of making learning media using the wordwall.net gamification platform, namely opening the wordwall.net page, selecting Sign Up, setting up myActivities display, making Maze Chase, and evaluating/viewing student work. The conclusion of this activity is the increase in the digital skills of the activity participants, game and quiz-based learning media products, as well as practical guidebooks for using the gamification platform. The material presented is useful for teachers and educators in preparing digital teaching materials based on games and quizzes.
PHYSICAL DISTANCING ALARM SYSTEM BASED ON PROXIMITY SENSOR AND MICROCONTROLLER Elfi Yuliza; Riska Ekawita; Vionita Vionita; Muhammad Khafid Fauzi; Vera Fuspita Sari; Handika Dany Rahmayanti
Indonesian Physical Review Vol. 4 No. 2 (2021)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v4i2.85

Abstract

Keeping an interaction distance between 1 to 2 m is one of the health protocols during the COVID-19 pandemic. This attempt was made to reduce the spread of the Coronavirus. On the other hand, this health protocol activity is often overlooked, whether intentionally or not. According to the mechanism of the Coronavirus spreading in the form of droplets that comes out during communication, sneezing, or coughing, maintaining distance can be the best effort to minimize the transmission of this virus. Therefore, the availability of a simple, accurate and user-friendly physical distancing alarm system could be a solution in the implementation of this health protocol. In this study, a prototype of a physical distancing alarm based on a distance sensor and a microcontroller in the form of an identity card was developed. Several steps are conducted in developing of this system, namely designing the instrumentation system and testing the performance of the system. System performance is tested through variations in the distance and angle of the objects. The measurement results show that the system can detect objects in front of the sensor up to a distance of 2.8m and an angle of  for a distance of 1m. The measurement using different angles of objects was performed for objects on the left and right sides of the sensor. In addition, a warning alarm will be on when the distance of the object exceeds the allowed distance.  
Preliminary Study of the Effect of Technology Integration on the Growth of the Printing Industry in Indonesia Haryasena Gusti Andayu; Handika Dany Rahmayanti
Jurnal Ilmiah Publipreneur Vol 9, No 1 (2021): Jurnal Ilmiah Publipreneur
Publisher : Politeknik Negeri Media Kreatif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46961/jip.v9i1.267

Abstract

Digital globalization in the economic sector is no exception in the printing industry. For hundreds of years the print media dominated for the dissemination of information. However, currently the dominance of the print media industry is now in danger of being shifted along with technological developments. This study shows how the growth of the print industry in Indonesia for several years. Based on the results of the study, the number of printing industries from 2011-2015 experienced a decline in almost all regions of Indonesia, including the provinces of West Java, East Java, DKI Jakarta, Banten, Kalimantan, Central Java and Sumatra. The decline in numbers occurred in the printing industry of newspapers, magazines, books and advertising. Especially for the packaging industry, it did not experience a significant decline and was relatively stable.