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Journal : Journal of Natural Sciences and Mathematics Research

Effect of the Pull and Diameter String of Badminton Racket Based on Coeffisient of Restitution Value Arianto, Ivan Setia; Nuri, Nuri; Yulianto, Agus
Journal Of Natural Sciences And Mathematics Research Vol 2, No 1 (2016): Volume 2, Nomor 1, 2016
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (791.699 KB) | DOI: 10.21580/jnsmr.2016.1.1.1639

Abstract

Racket and strings is an important factor in the badminton sport. The aim of this study to analyze the pull and the diameter racket string based on restitution coefficient of shuttlecock. The variation of pull was measured used racket Vinlux Miotex Power 007. Six variation of racket string are (22, 23, 24, 25, 26, and 27) lbs. The diameter of the strings has kept constant of 0.66 mm. The other variable is the diameter variation of the strings are (0.62, 0.64, 0.66, 0.68, and 0.70) mm, respectively and the pull of the strings are kept constant of 24 lbs. Based on the result, the increasing of the pull was decreased the COR value, from 0.541 to 0.374 for 22 lbs to 27 lbs, respectively. Furthermore, the similar trend for the diameter variation with the pull variation, the COR value was decreases with the increasing of the diameter, from 0.529 to 0.447 for (0.62 to 0.70) mm. We can conclude, the increases of the pull and diameter variation was decresed COR value of shuttlecock. ©2016 JNSMR UIN Walisongo. All rights reserved.
Effect of Thickness on Thermal Conductivity Based on Waste Newspaper Particle Board Theasy, Yoan; Yulianto, Agus; Astuti, Budi
Journal Of Natural Sciences And Mathematics Research Vol 3, No 1 (2017): Volume 3, Nomor 1, 2017
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (719.327 KB) | DOI: 10.21580/jnsmr.2017.3.1.1696

Abstract

Waste newspaper by most people still considered as waste that has not been used optimally, and it is the one of processed materials from wood which has lignocellulose. The material has the potential to produce particle board to test the value of thermal conductivity, which it is expected to be used as heat insulator. The process of producing particle board is by mixing 450 grams pureed newspaper with 260 grams PVAC, then print it with size (12x7)cm2 with the thickness of 0.5cm; 1 cm; 1.5 cm; 2 cm; 2.5 cm; 3 cm. The process to make particle board drying is for 5 days and the test of thermal conductivity using a 100 watt heat source, and an infrared thermometer. The result obtained from the value of thermal conductivity from newspaper particle board is when more higher value of particle board thickness then more higher the thermal conductivity value. From these result it can be concluded that the particle board which can be used as heat insulation material is the one that has a thermal conductivity value of 0.066 W/ mC; 0.125 W/ mC; 0.0167 W/ mC with thickness range of 1 cm to 2 cm.©2017 JNSMR UIN Walisongo. All rights reserved.
The effect of drying temperature on the characteristics of biodegradable plastic from Cassava pulp and Chitosan Adina Widi Astuti; Agus Yulianto; Upik Nurbaiti
Journal of Natural Sciences and Mathematics Research Vol 7, No 1 (2021): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2021.7.2.8389

Abstract

Conventional plastics made from polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC), polystyrene, and poly (ethylene terephthalate) are difficult to decompose. Bioplastics can reduce the amount of toxic waste generated from biological materials other than petroleum.  The combination of cassava pulp and chitosan can be used as a candidate for the manufacture of biodegradable plastics. The optimal drying temperature can produce biodegradable plastics that have good quality. The method used to determine the effect is the mechanical properties test with ASTM D-638M standard and degradation test. The results of this study obtained 6 samples of biodegradable plastic with variations in temperature A=40˚C, B=50˚C, C=60˚C, D=70˚C, E=80˚C and F=90˚C. From the results of the mechanical properties test, the tensile strength values of each sample are A = 0,84 MPa, B = 1,78 MPa, C = 2,24 MPa, D = 1,58 MPa, E = 1,23 MPa and F =0,57 MPa. While the percent elongation value of each sample is A = 11,09%, B = 21,62%, C = 30,25%, D = 15,94%, E = 13% and F = 7,2%. The drying temperature in the process of making biodegradable plastics can affect its mechanical properties, namely the higher the drying temperature used, the lower the tensile strength value and the percent elongation, this is because high temperatures can damage the chemical structure and evaporated sorbitol which serves to increase flexibility. The higher the drying temperature also causes the biodegradable plastic to take longer to degrade. Sample A with the lowest temperature degraded the fastest for 28 days, while sample F with the highest temperature degraded the fastest for 46 days.©2021 JNSMR UIN Walisongo. All rights reserved.
Co-Authors - Susanto .Gandri Haryono, M Abd Charis Fauzan Abd. Charis Fauzan Abdul Hamid Abdurrohman Khotim Nugraha Abu Bakar, Suriani Adi Tri Atmaja Adina Widi Astuti Aditya Marianti Afifah, Roidah Nur Agung Nugroho, Puguh Agung Setyo Darmawan Agus Raharjo Ahmad Izzuddin Ahsani, Muh Syukri Akanboy, Jerikson Nastorius Akhmadi, Mohammad Fadnan Albari, Raffi Wizdaan Alfiyani, Lina Alifianto, Untung Allif Silfiyana Rohman Alvian, Alvian Amiruddin Amrullah Amiruddin Amrullah, Amiruddin Ana Safitri Andriyanto Andriyanto Andya Satya Purnomo Putro Andya Satya Purnomo Putro, Andya Satya Purnomo Angelia, Adinda Ani Ariani, Ani Anjaya, Perdana Dika Ansori, Redhitya Wempi Anugrahaini, Ulya Santa Arba Arianto, Ivan Setia Arif Widiyatmoko, Arif Arifin Arifin Armin Sukri Kanna, Armin Sukri Ati, Laras Aulia Litsa Ariffiyah Awaludin Jamil Ayu Paramitha, Amelia Ayu Paramitha, Amelia Ayubi, Dimas Mohamad Azka, Millati Bahar, Abely Aliya Bambang Genjik S Bambang Subali Budi Antoni Saputra Budi Antoni Saputra, Budi Antoni Budi Astuti Budi Sudrajat Budiyanto, Saraswati Putri Chairumin Alfin D.R, Priyandika Darmoko, Cahya Darsono, Teguh Delvita Puspitasari Dewi, Adelina Ryan Candra Dian Wahid Hermawan, Dian Wahid Didit Darmawan E. Marhaeniyanto Edi, Sukiswo Supeni Effendy, Suhardi - Eko Budianto Eko Nugroho Yuliono, Eko Nugroho Eli Masnawati Eling Purwantoyo Ellianawati, Ellianawati Endang Susilaningsih Erry Hidayanto Fandi Musthofa A. S. Fandi Musthofa A. S., Fandi Musthofa Fathul Niam Fatiatun, Fatiatun Fianti Fianti Fianti, Fianti Firdhosiyah, Siti Firmansyah Firmansyah Firmansyah Firmansyah, Firmansyah - Fitrianti, Dwi Agung Fitriawan, Margi Fitriawan, Margi Fitriyah, Maghfirotul Gamal Kusuma Zamahsari Gandri Haryono, M. Giovani Siahaan, Fery Hadi Susanto Hariani, Mila Hasanah, Dian Uswatun Hasni, Nur 'Ainiyyah Herkulana Herkulana Hidayat, Rezaldi Ian Yulianti, Ian Ibnul Mubarok Ihwanudin, Maulana Ika Vidiasari Aristawati Imra, Imra Insyiroh, Ilusia Ira Maya Abdiani Issalillah, Fayola Iwan Iwan Iwan junaedi Iwan Junaedi Jery, Jery Junaedi Harmiansyah, Junaedi Kartono - Kewa, Kristofora Karolina Khayru, Rafadi Khan Khoirul Wafa Khoirun Nisa Khoirun Nisa’, Khoirun Khoirun Nisa’ Khumaedi - Khuzaimah, Ima Siti Kirana, Elsa Kusjuriansah, Kusjuriansah Lubis, Mutia Hariza Lucky Zaehir Maulana Made D.P, Ngurah Mahardika Prasetya Aji Malinda Fatmawati Masduki Masduki Mashudi Mashudi Masturi Masturi Meutia, Eva Moh. Shofi Nur Utami Moh. Shofi Nur Utami, Moh. Shofi Nur Mohamad Ayubi, Dimas Mohammad Qois Syafi Mufatihah, Nishfa Mufidah, Isna Mainnatul Mufti, Afrizal Mufti, Afrizal Muhammad Firdaus Muhammad Haikal Muhammad Rasyid Ridla, Muhammad Rasyid Mukhlisin, Latutik Mulia Rahmayu Mulyanti, Restina Muji Mulyono Mulyono Mumtaza Putri, Anne Nafiusokhib Naila Hilmiyana Syifa Nanang Zamroji Nathan Hindarto Nisa’, Khoirun Nita Rosita Nita Rosita, Nita Noor Alis Setiyadi Noviyanto Noviyanto, Noviyanto Nugroho, Adhi Nugroho, Krisna Ardi Nur Farida Haryanto, Lailin Nur Khasanah Nur Rohman Arif Nur Rohman Arif, Nur Rohman Nurdjanah Hamid Nuri Nuri Nurida Putri, Riska Nurlita, Putri Sandra Nuryati, Iis Nuzulina, Khoirun Palaifana, Oktorinda Parmin - Parmin Parmin Pramuko Ilmu Purboputro Praptiwi, Ucca Swasti Primadian, Fatimah Putra , Arif Rachman Putra, Ngurah Made Darma Putri Arif, Nur Nabilah Putut Marwoto Rahmah, Nurul Rahman, Nuril Endi Ramadhani, Amanda Dhyan Purna Ramadhani, Athirah Nur Randa, Dendy Redhitya Wempi Ansori Rengganis, Amalia Puspita Reza Faizal, Reza Riameinda Br. Bangun Riameinda Br. Bangun, Riameinda Br. Rizal Syarief Rizka Silviana Hartanti, Rizka Silviana Rohasad, Rohasad Samsul Arifin Saputra, Andi Prasasti Saputra, Muhammad Kholil Bayu Sarjito - Sarwi - Sauri, Salsabila Scolastika Mariani Sekarpratiwi, Farah Kinayu Senda, Tamara Rizky Septiono, Priyo Sidiq, Alif Lombardoaji Sikumbang, Dandy Julian Simanjuntak, Ricky Febrinaldy Siti Haerani Siti Haerani Siti Munazilah Siti Uswatun Kasanah Sobirin, Mohamad Sobirin, Mohamad Sri Buwono . Sugianto Sugianto Sulhadi - Sulistiyo Rini, Ari Sumini Sumini, Sumini Sunyoto Eko Nugroho, Sunyoto Eko Suparmi Suparmi Supraptomo, RTH Supriyadi Supriyadi Suranto Suranto Suroto, Karunia Setyowati Susanto Sutikno Sutikno Syafi, Mohammad Qois Syafi’i, Farrel Fadillah Syarif, Junaidi Theasy, Yoan Theresia Theresia Topan, Andi Tri Novianto, Tri Ucca Swasti Praptiwi Umi Nahdiyah Upik Nurbaiti Usriyah, Farida Usriyah, Farida Victory, Raja Pingkir Wahyuni, Asri Warol, Khoirul Warol, Warol Wigandi, Dikdik Permana Wulandari, Martina Diah Yani Puspitarini Yani Puspitarini, Yani Yulianto, Sisworo Yulita Nurbaiti Yusuf, Dini Hidayati Zainal Rosyadi