Kecemasan Masyarakat Terhadap Covid-19 Berdasarkan Usia dan Zona Tempat Tinggal

The current study aims to identified and described the differences in the level of public anxiety concerning the COVID-19 pandemic based on age and residential zone and the implications for guidance and counseling. This research used a quantitative approach with a comparative descriptive method. The population in this study were the people of 12 districts/cities in Riau Province with the sampling technique using simple random sampling which obtained a sample of 200 people ranging from adolescence to senior with details of 100 people coming from the red zone and 100 people from the green zone of COVID-19 transmission. The research instrument used a Likert-scale questionnaire on the level of public anxiety. The questionnaire was distributed using the google form and the data collection was conducted start from April until May 2020. The results of this study indicated that: (1) the public's anxiety concerning COVID-19 pandemic categorized as moderate; (2) public anxiety concerning COVID-19 pandemic with the highest percentage emerges in the senior category; (3) there was a significant difference between the level of anxiety of people living in the green zone and the red zone concerning COVID-19. These results can be used as references in making guidance and counseling programs in educational units, counseling organizations, and the government as a foundation for a policy brief in dealing with the COVID-19 pandemic

PENDIDIKAN LINGKUNGAN DI SDN 16 SEUNUDDON KABUPATEN ACEH UTARA DALAM RANGKA KONSERVASI BURUNG MIGRAN

Seunuddon, salah satu distrik di Kabupaten Aceh Utara, menjadi salah satu kecamatan yang menjadi titik singgah burung migran. Sebanyak 32 spesies burung migran yang berasal dari beberapa negara teridentifikasi berada di kecamatan tersebut. Akan tetapi, karena kurangnya pemahaman dan edukasi terhadap burung migran, masyarakat lokal mengganggap keberadaan burung migran bukan sesuatu yang istimewa. Hilangnya nilai budaya konservasi dalam masyarakat Aceh mengakibatkan sulitnya upaya untuk melindungi kehadiran burung migran. Rendahnya pemahaman inilah yang menjadi latar belakang perlunya pemahaman nilai konservasi pada SDN 16 Seunuddon, Kabupaten Aceh Utara. Metode kegiatan ini adalah learning by game berupa kegiatan pemaparan materi tentang konservasi dengan menggunakan bahasa Aceh, tanya jawab, kuis interaktif dan lomba mewarnai pada siswa kelas 5 Sekolah Dasar SDN 16 Seunuddon. Dari hasil kegiatan didapatkan peningkatan pemahaman siswa mengenai burung migran dan konservasi wilayah pesisir. Berdasarkan hasil wawancara anak-anak lebih paham dengan menggunakan bahasa Aceh karena merupakan bahasa sehari-hari. Terdapat kenaikan yang cukup signifikan dari hasil kuis yang telah dilakukan yaitu nilai rata-rata pre-test yaitu 49,2 dan mengalami kenaikan pada nilai post-test sebesar 84,6. Untuk pemahaman siswa melalui tebak gambar, siswa mampu menjawab nama burung migran dari gambar yang disajikan. Sementara itu, untuk lomba mewarnai, 25 siswa mampu mewarnai gambar dengan objek burung migran dengan kategori baik dan 10 dengan kategori sangat baik

WHAT IS ABOUT ONLINE LEARNING?

This article is entitled What's About Online learning? This article aims to describe what online learning is and at the same time describe how online learning is implemented in a school and the constraints and solutions that are given to the various challenges faced in learning. The study also found three sub-focuses, they are (1) the implementation of online learning policies, (2) the obstacles faced by teachers, parents, and students in online learning, and (3) solutions that were given to obstacles in online learning. In addition, the researchers also found its benefits in online learning experienced by parents, students, and teachers. Data collection techniques used were observation, interviews, and documentation. Data analysis techniques used were data reduction, data display, and conclusion. The informants consisted of principals, school supervisors, 12 students, 12 parents, and school committee administrators. The results indicated that the implementation of online learning policies has not gone well. Its success was inseparable from the discipline of all participants, they are schools, teachers, parents, and students. Therefore, from the school, it was required a systematic structure and simple schedule that could make it easier for parents to supervise children's learning. The involvement of parents influences the successful learning for children themselves, because education for children was not completely left to the school. The solutions given to the existing constraints are not appropriate and need to be re-examined

Sustainability assessment of xylitol production from empty fruit bunch

Empty fruit bunch (EFB), one of the wastes from palm oil production, can be utilized into fuels and chemicals. The aim of this paper is to find the optimum capacity to produce xylitol from EFB. The optimum capacity was found by simultaneously considering its profitability, hazard potential and environmental performances. The process was developed and simulated using Aspen Plus to analyze its technical challenges and economic performances, covering net present values, internal rate of returns and payback period. On the other hand, hazard identification and ranking (HIRA) was used to evaluate its safety performances, while Simapro V.8.5.2 was used to assess the environmental impact via a life cycle assessment (LCA). The results show that the high consumption of steam in chemical hydrogenation causes the main contribution of Global warming potential (GWP) by 62%. This acid pre-treatment is also considered the most toxic part of the process while the hydrogenation of xylitol is the most hazardous part based on fire and explosion perspectives. Then, multi-objective optimization using Genetic Algorithm (GA) was performed in Matlab to find the optimum capacity. The methodology and result of this work lay the foundation of future works in utilizing

Limitation in fabricating PSf/ZIF-8 hollow fiber membrane for CO2/CH4 separation

Hollow fiber membrane configuration is way forward in membrane development since it possesses higher packing density and effective surface area per unit module compared to other configuration. Since majority of mixed matrix membrane (MMM) for gas separation reported focuses on flat sheet membrane development, this report aims to address the challenges faced in fabricating hollow fiber MMM. In this study, hollow fiber formulation is fabricated and their MMM using different types of fillers (virgin and modified ZIF-8) are prepared and used as a dispersed phase. The neat hollow fiber membrane shows good results with CO2 permeance of 104.39 GPU and CO2/CH4 selectivity of 29.28, in comparison with reported literature. Upon filler incorporation, the resulted MMMs appear to be diminished in both CO2 permeance and CO2/CH4 selectivity. While using modified ZIF-8, lesser deterioration was shown compared to pure ZIF-8, this phenomenon is likely to occur due to the changes in solution stability which causes notable changes in membrane morphology and performances

SIMULATION OF CO-PROCESSING BIO-OIL AND VGO IN FLUID CATALYTIC CRACKING UNITS

Biofuel is a promising substitute for fossil fuels to reduce greenhouse gas emissions and to provide highly sustainable fuels. Several technical challenges are indeed present during upgrading bio-oil to transportation fuel on a large scale. Co-processing bio-oil with some petroleum fractions in existing refineries serves as an alternative method to minimise processing costs. This paper aims to evaluate the co-processing by exploring the effects of temperature, bio-oil ratios and types of bio-oil to the product yields and quality in a Fluid Catalytic Cracking (FCC) unit within a refinery complex. The considered bio-oil are produced from pyrolysis of Palm Kernel Shell (PKS) and Empty Fruit bunch (EFB). The results show that bio-oil from PKS is better suited to produce gasoline due to its aromatic nature and its carbon range similarities compared to that from EFB. A mixture of 20% of hydrodeoxygenated (HDO) PKS in vacuum gas oil (VGO) shows a 5% improvement of naphtha yield while 20% raw bio-oil from PKS produces 4% increase in light cycle oil (LCO) yield

A Two-Step Optimization Approach for Retrofit of Water Network System

Many industrial plants have been using an enormous amount of water to run their processes. The scarcities of water supply, increasing cost of providing freshwater as well as treating wastewater, and the stricter environmental regulations have driven more efficient water usage. In this regard, the most common way is the application of water reuse, regeneration, and recycle (W3R concept). Even though the W3R concept is not new, the systematic approach to select the optimum combination of the W3R is relatively new. Thus, the latter has drawn more attention of many researchers. Researchers have addressed common practical constraints such as forbidden/compulsory piping connections, minimum permissible water flowrate, and geographical constraints in developing their water network. However, most engineers challenge the researchers to provide a tool that can be controlled manually (user-interactive tool) during the designing process, especially in retrofit scenarios. This ability will be used to direct the solutions to become more realistic and practical featuring achievable targets. The tool must also able to produce multiple options simultaneously to give a large picture of what the solutions are going to be when more modifications are taken. These challenges were missed by previous works that are commonly based on graphical and automated mathematical programming methods, especially when their grassroots methods are used in retrofit designs. A two-step optimization approach is presented in this work to provide a new procedure to design multiple options of water network. The presented approach incorporates manual control (user-interactive tool) over the optimization process to consider the aforementioned practical constraints. The approach consists of structural targeting step utilizing Mixed Integer Linear Programming (MILP) and parametric optimization step using Non Linear Programming (NLP), which can be used to grassroots and retrofit design of water network. The considered water networks are water-using operations with water reuse, regeneration, and recycle (W3Rs) concept. wastewater treatment systems, and total water systems. Several water problems are solved and compared with their corresponding solutions obtained by previous work. The comparison shows that the presented approach can provide the same optimum solutions for each water problems. The approach can also provide multiple realistic solutions incorporated in "a class of good solutions" and the ability to see large picture of the developments of water system design ("project road map of achievable target and design"). These good solutions are to be further chosen by engineers based on their considerations or their company preferences. In the retrofit case study, one of the solutions has achieved a reduction of 59% of freshwater consumption. The total annual cost for the solution of retrofit water network system is reduced until 29%

Simulation and Sustainability Assessment Of H2S Utilization from Acid Gas on Haldor Topse Wet Gas Sulfuric Acid and Claus

Claus process is a widely adopted process to reduce emissions from refineries by converting H2S into elemental sulfur. On the other hand, Haldor Topsoe’s Wet Gas Sulfuric Acid (WSA) is an alternative to convert H2S directly into sulfuric acid. The purpose of this project was to simulate both of these state-of-the-art technologies and evaluate their suitability for various acid gas capacity and H2S concentrations. Three sustainability pillars of people (safety), planet (environment), and profit were used as the comparison metrics. The developed simulation (1st principle) models were used to generate lots of data as the basis for subsequent development of regression models. The latter models were used in the comparisons for they are much faster in calculations than the 1st principle models. The results showed that the WSA process was safer (lower Fire and Explosion Damage Index), more environmentally friendly (lower Global Warming Potential), and more profitable (higher annual profit) in most of the evaluated operating conditions

Sistem Sensor Kualitas Minyak Goreng Berdasarkan pada Pengukuran Kapasitansi dan Panjang Berkas Pembiasan Cahaya

Minyak merupakan salah satu kebutuhan pokok manusia. Kualitas suatu minyak sangat penting diketahui, karena setiap minyak dengan jenis yang sama mempunyai kualitas yang berbeda. Oleh karena itu, perlu dibuat sebuah teknologi yang tepat guna dan ekonomis untuk mengetahui kualitas minyak tersebut. Pada tugas akhir ini penulis telah membuat Sistem Sensor kualitas Minyak Berdasarkan Pada Pengukuran Kapasitansi Dan Panjang Berkas Pembiasan Cahaya. Sistem untuk pengukuran kapasitansi bekerja menggunakan astabel multivibrator dengan frekuensi 50,332  Khz. Frekuensi  50,332  khz ini selanjutnya dirubah ke tegangan dengan menggunakan F to V konverter. Rangkaian F to V konverter yang dirancang mampu bekerja dari frekuensi 1khz-100 khz. Data tegangan yang diperoleh dari f to v konverter ini akan di baca oleh mikrokontroller sebagai data ADC 10 bit. Dengan berubahnya frekuensi, maka data ADC akan berubah. Untuk panjang berkas pembiasan cahaya, sistem ini menggunakan webcam yang berbasis komputer untuk menghitung panjang berkas pembiasan cahaya dengan mendapatkan nilai pixel setiap sampel minyak. Berdasarkan pengujian didapatkan bahwa sistem ini dapat membedakan kualitas minyak yang meliputi minyak goreng murni, minyak goreng bekas, oli murni, oli beka