Universitas Pendidikan Indonesia
  • Bandung, Jawa Barat, Indonesia
Recent publications
COVID-19 pandemic gives a very significant impact on many aspects of life in a global scale. In Indonesia, as in many countries in the world, public activities involving many people are restricted and regulated to prevent the virus’ broader spread. Technology which still enables activities to be conducted individually and remotely is needed, because during the pandemic, they can only be done very limitedly, if not stopped. Therefore, people are utilizing telecommunications to assist activities during the COVID-19 pandemic. Several innovations involving telecommunication technology are applied, e.g., distance learning (e-learning), online business (e-commerce), and digital health services (e-health). However, there are many challenges in using telecommunication technology during a pandemic in developing countries, especially in Indonesia. This article examines (1) the role of telecommunication technology in education, economy, and health sectors, (2) the challenges, and (3) how telecommunication technology as the solution can be more effective in future. This article provides an outlook and in-depth overview of how the impact of recent technology, especially telecommunication, played a vital role in the three crucial sectors in mid-low countries like Indonesia during the COVID-19 outbreak.
While research exists on literacy focused on children in formal school, there is little evidence of how adult literacy is depicted in social practice from the perspective of what adults do in daily life. This study investigates the effectiveness of literacy teaching design integrating local culture discourse and practice to enhance the reading skills of adults in Indonesia. One hundred participants from underdeveloped areas aged 25–50 contributed to the learning process for twelve lesson units. We elicited data by using two instruments, namely multiple-choice questions and interviews. The statistical analysis showed that instructional design profoundly affected the improvement of reading skills. The thematic analysis showed how participants evaluated the literacy teaching design as enriching knowledge, sharing understanding among participants and motivating them to improve their life skills. This study will be useful to teachers who are seeking cognitive and practical instructions to promote reading skills in the classroom.
This study aims to determine the relationship between religiosity, moral reasoning, and internalization of pure values as the mediator of prosocial behaviour among students in Banda Aceh, Indonesia. The Secondary Islamic Education Internalization Scale (SPPIP-M), Behaviour Reasoning Scheme Indicator (UPSTA), and Prosocial Tendencies Measure (PTM) scale were used to measure the religiosity, moral reasoning, and internalization of pure values prosocial behaviour of students. The result showed a link between religiosity, moral reasoning, and internalization of pure values with prosocial behaviour of secondary school students in Banda Aceh.
The world's energy consumption shows an increasing trend. Unfortunately, it is still dominated by the use of fossil energy. This condition results in concerns that an energy crisis will occur due to running out of non-renewable energy and an environmental crisis of global warming. One of the technology sectors that consumes a lot of energy is computer servers and data centers. This technology sector is growing rapidly due to the increasingly complex computing and larger data. One of the main causes of inefficiency in this technology is a decrease in performance due to an increase in temperature. Therefore, effective and efficient technology is needed to overcome the increasing operating temperature of computer servers and data centers. One of the most prominent cooling technologies to solve this problem is immersion colling. This method has developed in various types with their respective advantages and disadvantages according to application needs. Therefore, review literature is needed to comprehensively discuss the development of immersion cooling technology from the past until now and projected developments in the future. In more detail, this paper comprehensively compiles the latest findings of immersion cooling technology which includes an overview of the cooling system, history, implementation, construction type, and advantages. Ó 2022 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).
The outbreaks of infectious diseases that spread across countries have generally existed for centuries. An example is the occurrence of the COVID-19 pandemic in 2020, which led to the loss of lives and economic depreciation. One of the essential ways of handling the spread of viruses is the discovery and administration of vaccines. However, the major challenges of vaccination programs are associated with the vaccine cold chain management and cold storage facilities. This paper discusses how vaccine cold chain management and cold storage technology can address the challenges of vaccination programs. Specifically, it examines different systems for preserving vaccines in either liquid or frozen form to help ensure that they are not damaged during distribution from manufacturing facilities. Furthermore, A vaccine is likely to provide very low efficacy when it is not properly stored. According to preliminary studies, the inability to store vaccine properly is partly due to the incompetency of many stakeholders, especially in technical matters. The novelty of this study is to thoroughly explore cold storage technology for a faster and more comprehensive vaccine distribution hence it is expected to be one of the reference and inspiration for stakeholders.
Alkyl levulinates are one of the most desirable and promising compounds for biofuel production, since they have been identified as one of the prospective fuel-blending chemicals. So far, numerous types of heterogeneous acid catalysts have been used for the synthesis of alkyl levulinates. In this regard, designing and engineering new catalysts for upgrading levulinic acid into biofuel additives have received remarkable attention by global researchers and it has always been a challenging task. The aim of this article is to review the most six relevant heterogeneous catalysts, namely zeolites, mesoporous silicas, carbonaceous materials, metal organic frameworks (MOFs), ion exchange resins and enzymatic catalysts, in the esterification of levulinic acid. This review also outlooks the catalyst preparation, structural and surface modification, aspects of esterification reaction and reaction mechanisms involved. Subsequently, the challenges and future prospects in this field are also discussed.
The passive micromixer is one of the essential devices that can be integrated into the Lab on Chip (LoC) system. Micromixer is needed to increase mixing efficiency. In this paper, two Koch fractal obstacle-based micromixer models of Secondary Snowflakes Fractal Micromixer (SSFM) and Tertiary Snowflakes Fractal Micromixer (TSFM) were designed. The effect of the Koch fractal resistance angles (15 o , 30 o , 45 o , 315 o , 330 o , 345 o) and the influence of the inlet (T and T-vortex) were studied in this paper using COMSOL Multiphysics numerical simulations. The results showed that the TSFM structure with a 30 o angle on the T-vortex inlet is optimal. The deflection phenomena generated by the TSFM obstacle enhance the contact area between the two fluids and chaotic convection can be increased at Reynolds Number (Re) 0.05 and Re 100. This paper examines concentration curves along the channel ranging from 1 mol/L to 5 mol/L. This clearly shows that the fluid flow direction changes within the microchannel. This work provides a new design for the micromixer.
Arthrospira platensis (A. platensis) aqueous extract has massive amounts of natural products that can be used as future drugs, such as C-phycocyanin, allophycocyanin, etc. This extract was chosen because of its high adaptability, which reflects its resolute genetic composition. The proactive roles of cyanobacteria, particularly in the medical field, have been discussed in this review, including the history, previous food and drug administration (FDA) reports, health benefits and the various dose-dependent therapeutic functions that A. platensis possesses, including its role in fighting against lethal diseases such as cancer, SARS-CoV-2/COVID-19, etc. However, the remedy will not present its maximal effect without the proper delivery to the targeted place for deposition. The goal of this research is to maximize the bioavailability and delivery efficiency of A. platensis constituents through selected sites for effective therapeutic outcomes. The solutions reviewed are mainly on parenteral and tablet formulations. Moreover, suggested enteric polymers were discussed with minor composition variations applied for better storage in high humid countries alongside minor variations in the polymer design were suggested to enhance the premature release hindrance of basic drugs in low pH environments. In addition, it will open doors for research in delivering active pharmaceutical ingredients (APIs) in femtoscale with the use of various existing and new formulations.
This study aims to investigate the efficiency level of absorption of heavy metals Cd, Pb, and Hg. Combustion is carried out using coal with the addition of absorbent ratios of 2%, 4%, 6%, 8%, and 10%. The adsorbent used is natural zeolite which is widely available and inexpensive. This study provides practical implications for the easy and inexpensive removal of heavy metal emissions during combustion. The results show that the maximum efficiency level for Cd metal reached 22.96% which was recorded at a temperature of 600 °C for an adsorbent ratio of 10%. The maximum efficiency level of Pb metal from the experimental results was obtained at a temperature of 600 °C with an adsorbent ratio of 10% to 10.83%. Meanwhile, the efficiency level for Hg metal produced was 0.05% which was recorded at the adsorbent ratio of 10% at 800 °C. The maximum total capacity of Pb metal for each tested combustion temperature was 600 °C 39.85 mg/kg, 700 °C 25.43 mg/kg, and 800 °C 7.21 mg/kg. On the other words, the higher the combustion temperature tested, the lower the absorption efficiency rate obtained.
Waste generation from food manufacturing facilities poses a serious hazard like environmental degradation, water pollution, and land pollution due to its high nutrient composition. Specifically, solid waste (powder) disposal requires additional energy sources in terms of scientific treatment, structured collection, and disposal packaging according to the safety regulation. Thus, this research discusses the viewpoint of integrating food processing waste as an organic carbon source with BG-11 medium for Chlorella vulgaris (FSP-E) growth. The food processing waste powders investigated in this study were obtained from milk, and biscuit manufacturing facilities. The culture medium was modified by combining both BG-11 and food processing waste powders to identify the optimal algal growth and biochemical content. Compared to the microalgae grown in BG-11 alone (IBG), the combination of biscuit waste and IBG produced higher biomass concentration (44%), with increased lipid (11%), protein (20%), and carbohydrate (57%) contents. Chlorella vulgaris was able to uptake nutrients from the culture medium with combination of food processing waste and IBG thus enhancing its growth. The results obtained also indicate that an integrated culture system using food processing waste and synthetic sources can generate energy out of waste by improving the bio-composition of the microalgae biomass.
Purpose – The purpose of this study is to define and analyze the role of virtual reality experiences, travel motivation, travel constraints, and destination image on revisit intention. Design – Exploratory analysis to investigate whether destination image and revisit intention are influenced by virtual reality experience, travel motivation, and travel constraints. Methodology – The respondents in this study were Indonesian tourists who had already visited the destinations under study. The sampling method used was random sampling and the data analysis method used was structural equation modeling. Findings – The results show that destination image can mediate the influence of virtual reality experience on revisit intention. At the same time, travel motivation and travel constraints can have a direct positive influence on destination image. Originality of the research – This study demonstrates the critical significance of virtual reality in pandemic situations to help destinations improve their image and hence increase tourist arrivals, like as in Indonesia
Anti-Chinese sentiments are still deeply ingrained in the Indonesian public discourse. The issue of their identity and position triggers to many discriminatory actions toward them. The purpose of this study is to analyze hate speech against Chinese ethnic group expressed in Indonesian social media which has officially evaluated as a legal offense by the authorities. The theories of speech acts from Austin (1962) and Searle (1969) for a forensic linguistic study are employed to examine the hate speech as utterances and evaluate them in the context of Indonesian legal regulations. The data were obtained from Direktori Putusan Mahkamah Agung from 2019 - 2021. The results of the analysis reveal that hate speech portrays hurtful feelings and harmful attitudes. It is reflected by malice (expressive speech act), insult, or accuse (assertive speech act), persuasions so that others commit crimes (directive speech act), and crime plans in the future (commissive speech act). Then, there are ten forms of pejorative labels for the Chinese ethnic group. Race-based hate speeches expressed in the online media are prohibited according to Article 28 paragraph (2) of The ITE Law Article Number 19 of 2016. They are prejudiced action, violate human rights and cannot be considered as freedom of opinion and democracy because of their dangerous perlocutionary effects. The effects can provoke discriminatory action and even crime. Keywords: anti-Chinese, chinese ethnic group forensic linguistics, hate speech, racism.
In this study, the data source was obtained from the transcription of dump truck theft cases recorded in the Police Record. Investigators conducted investigative interviews to obtain information from witnesses and suspects, which led to the suspect's confession. The investigator asked several questions to the examinee regarding the criminal act. The data analysis method was carried out by eliminating the answers being examined and focusing on the questions given by the investigator to be classified based on the seven elicit functions of the speech act of asking questions described by Tsui (2002). It was found that the elicit function in the investigator's question was the function of seeking information (appearing 119 times), repeat function (appear 50 times), clarifying function (appear 47 times), confirm function (appear 43 times), and approve function (appear 11 times). The elicit function that occurred the most from the questions submitted by investigators was the function of seeking information, which was 119 times out of 270 questions. In contrast, the function of asking for commitment was not found. Keywords: ask, elicit function, investigative interview speech act
This study aims to determine how the influence of service quality and customer value on customer loyalty through customer satisfaction on DAMRI Transport Mode in Bandung, The research method used is quantitative, the sampling technique uses non-probability sampling and a sample of 260 respondents is obtained, the analytical tool used is Path Analysis and hypotheses using a significance test using the SPSS Version 24 and SEM AMOS analysis tool. The results of this study indicate that direct testing for direct testing of the customer loyalty variable it is found that service quality and customer satisfaction to customer loyalty has a positive and significant effect for use bus DAMRI in Bandung, while for customer value it has no effect on customer loyalty for use bus DAMRI in Bandung. With regard to customers' ownership, it is possible to increase the quality of service quality and customer loyalty to customers by giving goods a consumer satisfaction that would allow them to be loyal to using DAMRI bus as a mode of transportation in everyday activities.
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11,390 members
Ida Hamidah
  • Department of Mechanical Engineering
Topik Hidayat
  • Department of Biology Education
Beta Paramita
  • Department of Architectural Engineering
Ega Berman
  • Department of Mechanical Engineering Education
Adi Rahmat
  • Department of Biology Education
Jl. Dr. Setiabudhi No. 229 Bandung, 40154, Bandung, Jawa Barat, Indonesia
Head of institution
Prof. Dr. H. R. Asep Kadarohman, M.Si.