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Quantification the morphological structure of bio-based membrane by high resolution of SEM imaging

AIP Conference Proceedings 2023年第1期2477卷

作者： Afrillia Fahrina Sri Aprilia Muhammad Roil Bilad Nasrul Arahman Maughal Ahmed Ali Baig Avala Raji Reddy Department of Chemical Engineering Universitas Syiah Kuala Banda Aceh Indonesia Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh Indonesia Faculty of Integrated Technologies Universiti Brunei Darussalam Brunei Darussalam Department of Mechanical Engineering CMR Technical Campus Hyderabad India

For the purpose of semi-permeable filtration system, membrane morphological structure determines the permeation quality. Membrane surface porosity, pore size distribution, symmetric and asymmetric structure in cross-section membrane play crucial role in transport properties. Therefore, scanning electron microscopy (SEM) plays important role to visualize the microscopical pore structure of membranes. In this study, bio-based composite membranes were prepared using non-solvent induced phase separation (NIPS) method. Polyvinylidene fluoride (PVDF) was employed as the main material, while ginger extract (GE) and SiO2 nanoparticles were used as additives. SEM image in this study provide information of membrane structure in surface and cross-section part. Furthermore, quantitative data of membranes in term of overall porosity is also presented. ImageJ tools is applied as software-aided SEM images processing method. The result analysis shows that addition of GE and SiO2 increase membrane porosity up to 70.81%.

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The analysis of mortar concrete with the variety of sands in jepara (keling sand, bangsri sand) using strong pressure method 1

The analysis of mortar concrete with the variety of sands in...

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1st Workshop on Environmental Science, Society, and Technology, WESTECH 2018

作者： Saputro, Yayan Adi Mudiyono, Rachmat Antonius Magister of Civil Engineering Faculty of Engineering Islamic University of Sultan Agung Semarang Semarang Indonesia Civil Engineering Program Study Faculty of Science and Technology Islamic University of Nahdlatul Ulama Jepara Central Java Indonesia

Along with the increasing of infrastructure development in Indonesia especially in jepara, so the necessary of material also increase, for example: sand. Nowadays, muntilan is the sand that often be used in making infrastructure in the government because it is considered that it has the good quality, whereas in the other hand the river sand is also abundant, but the government perverted mintilan sand as the development material. River sand is usually used by the middle to lower county because the house because the price is cheaper than muntilan sand. After doing this research we hope that: can know the quality of the river sand if it is used in infeastructure, knowing the river sand in jepara that have the good quality, such as: keling sand, bangsri sand, The stages of this research are: preparation, sand inspection (mud content and organic faces, filter analysis, moister content and weight, and specific gravity), making spacimens based on SKSNI 03-6825-2002 ASTM C 305, making compressive strength test. The test result show that at 3,7,14,21,28 days old show that keling sand (93,2 kg/cm2), bangsri sand (135,2 kg/cm2). The use of river sand as the construction material by the government and community will have consequence on the balance kf muntilan sand and river sand. The specific treatment on the river sand will that quality that is almost same as muntilan sand. © Published under licence by IOP Publishing Ltd.

关键词： Sand

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The effect of ultraviolet exposure on physical properties of electrospun nanofiber membrane based on polyvinyl alcohol and aloe vera 4th

The effect of ultraviolet exposure on physical properties of...

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4th Padjadjaran International Physics Symposium, PIPS 2019

作者： Hikmawati, Dyah Maharani, Noveni Putri Putra, Alfian Pramudita Siswanto Department of Physics Faculty of Science and Technology Universitas Airlangga SurabayaEast Java60115 Indonesia Biomedical Engineering Study Program Department of Physics Faculty of Science and Technology Universitas Airlangga SurabayaEast Java60115 Indonesia Biomedical Signals and Systems Research Group Faculty of Science and Technology Universitas Airlangga SurabayaEast Java60115 Indonesia

ISBN: (纸本)9783035716979

Ultraviolet (UV) irradiation in biomaterial synthesis is commonly used to do sterilization and to improve the physical characteristics. This study is aimed to study the characteristics of polyvinyl alcohol-Aloe vera (PVA-AV) nanofibers from electrospinning process, that was exposed by UV for 6 h with various power of 8, 10, 15, and 20 W. The physical properties of the fiber were characterized by using Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), Differential Scanning Calorimetry (DSC) test, and water absorption test. The SEM images showed that the nanofibers were formed with s homogeneous structure and no bead was observed. The diameter and the thickness of the nanofibers are increased with the increase of the power of UV exposed to the samples. The biggest diameter was 319.60 ± 56.17 nm obtained at UV exposure power of 20 W. The FTIR test result indicated that there was no new chemical bond after the PVA-AV was exposed by UV. Meanwhile, the DSC test showed that the increase of power could increase the melting temperature (Tm) with the highest value of 189.51°C at UV exposure power of 20 W. The water absorption test showed that the highest water absorption was 739.6 % obtained at UV exposure power of 20 W. © 2020 Trans Tech Publications Ltd, Switzerland.

关键词： Nanofibers

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Fabrication and bioactivity studies of wollastonite/polycaprolactone composites

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International Journal of Nano and Biomaterials 2023年第2期10卷 86-99页

作者： Lakshmi, R. Choudhary, Rajan Senatov, Fedor Kaloshkin, Sergey Kothandam, Shobana Ponnamma, Deepalekshmi Sadasivuni, Kishor Kumar Swamiappan, Sasikumar Department of Chemistry Auxilium College Tamil Nadu Vellore632006 India Faculty of Materials Science and Applied Chemistry Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU Institute of General Chemical Engineering Riga Technical University Pulka St 3 RigaLV-1007 Latvia Baltic Biomaterials Centre of Excellence Headquarters at Riga Technical University Kipsala Street 6A RigaLV-1048 Latvia National University of Science and Technology "MISiS" Moscow119049 Russia Department of Chemistry School of Advanced Sciences Vellore Institute of Technology Tamil Nadu Vellore632014 India Materials Science and Technology Program Department of Mathematics Statistics and Physics College of Arts and Sciences Qatar University P.O. Box 2713 Doha Qatar Center for Advanced Materials Qatar University P.O. Box 2713 Doha Qatar Department of Chemistry School of Advanced Sciences Vellore Institute of Technology Tamil Nadu Vellore632014 India

Current work investigates the influence of wollastonite on mechanical stability and biomineralisation ability of wollastonite/ polycaprolactone (PCL) composites (WP composites). The solvent casting particulate leaching method was used to prepare these composites. FT-IR spectra indicated the presence of functional groups associated with PCL and wollastonite. Scanning electron microscopy showed aggregated morphology and wollastonite particles were embedded in the PCL matrix. The incorporation of wollastonite leads to a more than three-fold increase in the compressive strength of the composites. Moreover, the composites containing 50% wollastonite exhibited better compressive strength than 80%. This observation suggested that if the concentration of a filler is exceeded beyond its critical concentration then the mechanical stability of the composite will be compromised. The composites revealed good apatite deposition ability. Thus, the biomineralisation ability and compressive strength of PCL can be improved by preparing its composites with bioceramics. © 2023 Inderscience Enterprises Ltd.

关键词： Bioceramics

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Testing Real-Time Applications on Windows 10 IOT Using the Nyquist Theory 1

Testing Real-Time Applications on Windows 10 IOT Using the N...

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1st International Conference on Computer Science and Applied Mathematic, ICCSAM 2018

作者： Syahputa, Zulfahmi Zarlis, M. Nasution, Beny B. Informatics Engineering Study Program Magister Faculty of Computer Science Information Technology Universitas Sumatera Utara Medan Indonesia

Raspberry Pi is a mini-computer that is provided to carry out activities quickly and precisely, but Raspberry Pi was created to not be able to do the real-time system with the support of Windows 10 IoT operating system, so the real-time system can be done on Raspberry Pi. The real-time applied in the application needs to be tested with the Nyquist theory. The purpose of this study was to get real-time system measurements available on Windows 10 IoT. This test is done using the Nyquist theory by calculating the results of measurements on mp3 streaming performed on Windows 10 IoT. © Published under licence by IOP Publishing Ltd.

关键词： Real time systems

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Analysis of Decision Tree and Smooth Support Vector Machine Methods on Data Mining 1

Analysis of Decision Tree and Smooth Support Vector Machine ...

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1st International Conference on Computer Science and Applied Mathematic, ICCSAM 2018

作者： Sitepu, Natalina Br Sawaluddin Zarlis, M. Efendi, Syahril Dhany, Hanna Willa Informatic Engineering Study Program Magister Faculty of Computer Science and Information Technology Universitas Sumatra Utara Medan Indonesia

This research is about smooth support vector machine (SSVM) and Decision Tree in data mining. Many researchers conduct and develop methods to improve the accuracy and classification of data on good results. This research was conducted by conducting an experiment on STMIK Neumann Medan student data. In this study, it was concluded that Decision Tree performance is better than SSVM, Decision Tree gets very good results that promise to help find the best students to get scholarships. This study is better than SSVM. The training process has a difference of 11.04% and the testing process is 10.08% with each Accuracy. © Published under licence by IOP Publishing Ltd.

关键词： Decision trees

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A contrastive analysis of wall water quality test in parepare city, indonesia 1st

A contrastive analysis of wall water quality test in parepar...

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1st International Symposium on Green Materials and Technology, ISGMT 2018

作者： Rahmawati Jasman Mustakim Andi, Irmayani Pawelloi Andi, Abd. Jabbar Muhammadiyah University of Parepare Faculty of Engineering Civil Engineering Study Program Jl. Jend. A. Yani KM 6 Kota Parepare South Sulawesi Indonesia Muhammadiyah University of Parepare Faculty of Engineering Electrical Engineering Study Program Jl. Jend. A. Yani KM 6 Kota Parepare South Sulawesi Indonesia

ISBN: (纸本)9783035714517

Availability of raw water is one of the problems faced in the provision of clean water services in Indonesia. The purpose of this study was to determine differences in the quality of ordinary well water and drill water with physical parameters. The number of samples in this study were 12 drill wells and 12 ordinary wells belonging to residents in the City of Parepare and the total wells were 12 villages. The parameters observed refer to the Indonesian Minister of Health Regulation Number 479 / Menkes / Per / IV / 2010 concerning Water Quality Requirements and Supervision which includes physical parameters such as turbidity. Data collection methods used in this study were cross sectional or analyzed in South Sulawesi Provincial Health Laboratory Makassar. Based on the results of laboratory tests for measuring water quality as measured by one of the physical parameters, namely turbidity, there is a difference in value between ordinary wells and boreholes. The turbidity values measured in ordinary wells are 3 villages that do not meet the requirements of clean water quality, where all of the results are above the maximum set level of> 5 NTU, the kelurahan is watang Soreang village, Lompoe village and Galung Maloang village while the turbidity value is measured in drill wells are the result that meets the requirements of clean water quality where the results do not exceed the maximum maximum set level of 5 NTU. © 2019 Trans Tech Publications Ltd, Switzerland. All rights reserved.

关键词： Water quality

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Quickly understanding of android-based application athlete's buddy to balancing the athlete physical nutrition

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AIP Conference Proceedings 2023年第1期2646卷

作者： Setya Chendra Wibawa Edy Sulistiyo Bambang Sujatmiko Annisa Rahmi Nareswari Eko Handoyo Joni Susilowibowo Bachtiar S. Bachri Digital Literacy Team Universitas Negeri Surabaya Surabaya Indonesia Nutrition study program Faculty of Engineering Universitas Negeri Surabaya Surabaya Indonesia Universitas Negeri Semarang Semarang Indonesia

The 2021 PON XX Papua Indonesia is a moment for athletes to show themselves in the sports field. The ability of an athlete is influenced by the need for balanced nutrition. Guidance is needed for athletes and athlete managers to apply balanced nutrition to excel. This study designed an application that was then analyzed for its effectiveness in implementing balanced nutrition in the form of an Android-based Athlete's Buddy application. The assessment method used in this application is the ADDIE (Analysis, Design, Develop, Implement, and Evaluate) method. The results of the discussion stated that 85% of application was very feasible to use. Testing applications based on UTAUT2 with indicators of Understand ability, Learnability, Operability, Functionality, Content. So it can be concluded that the "Athlete's Buddy" application can run well and is expected to be able to help the community and athletes to increase their knowledge, help athletes to control and know the nutrients needed by the body. The implication of this research is the application of digital literacy for athletes in maintaining balanced nutrition.

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Grain-size characteristics of aceh's coastal deposits 8

Grain-size characteristics of aceh's coastal deposits

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8th Annual International Conference 2018 on Science and engineering, AIC-SE 2018

作者： Setiawan, B. Antonie, S. Adhiperdana, B.G. Program Study of Geological Engineering Faculty of Engineering Syiah Kuala University Banda Aceh23111 Indonesia Faculty of Sciences King Abdulaziz University Jeddah21589 Saudi Arabia Faculty of Engineering Geology Padjadjaran University Jatinangor45363 Indonesia

This study investigates the grain size characteristics and sediment types of the Aceh's coastal deposits that are primarily based on the sieve analysis. This study is mainly driven by two reasons. Firstly, this study is a preliminary effort to identify coastal sediment in the Aceh coastal areas. Secondly, this information is important to interpret the support mechanism of sediment during transportation and depositional processes. In this study, many sediment deposits from both the east and west coasts of Aceh were collected. Laboratory sieve analysis was carried out to these samples. Then, further analysis of this sieve analysis results is carried out. The analysis reveals the past transport mechanism of this study sand deposits which is river's channel. However, such finding should be investigated further as all the tested sand were taken at the top surface and big main rivers are not indicated at both sand locations. © Published under licence by IOP Publishing Ltd.

关键词： Sediments

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Electronic-offering of fresh fruit bunches oil palm by independent farmer with a blockchain approach

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AIP Conference Proceedings 2025年第1期3223卷

作者： Harison Marimin Sukardi Faqih Udin Yani Nurhadriyani Engineer Professional Education Study Program Universitas Andalas Padang Indonesia - 25000 Department of Agro-industrial Technology Faculty of Agricultural Engineering and Technology IPB University Bogor Indonesia - 16680 Department of Computer Science Faculty of Mathematics and Natural Sciences IPB University Bogor Indonesia – 16680

Indonesia meets the needs of 50% of the world's palm oil needs. Sources of Indonesian palm oil, 34 % are produced by independent smallholders. The lack of governance of independent smallholders leads to low productivity of their crops. Global market demands for palm oil derivative sources become an obligation to compete. The development of blockchain technology that favors traceability and transparency is applied in the supply agriculture sector, and this is an opportunity for how blockchain technology can help the palm oil supply chain become transparent and can find its source. This research uses the system development life cycle (SDLC) method. And business process model and notation in business model design. The results of the design of the FFB sale and purchase transaction system with blockchain technology have succeeded in connecting farmer transactions as FFB providers with traders and PKS as FFB buyers. Every transaction sent by the farmer will be locked by a hash, as immunity makes the data sent immutable. The system can display the traceability of transactions while maintaining the integrity of member information.

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