bluuebunny/crossref_metadata_2025 huggingface dataset:
Pengembangan Perangkat Pembelajaran Berbasis Problem Based Learning Berbantuan E-Module untuk Meningkatkan Kemampuan Pemecahan Masalah Matematika
Authors: Rahmadila Rahmadila , Permana Dony , Musdi Edwin
Published: November 2022

Penelitian ini dilatarbelakangi oleh kurang optimalnya kemampuan pemecahan masalah matematis peserta didik kelas XI SMA. Penelitian ini bertujuan untuk menghasilkan RPP dan e-module menggunakan model problem based learning yang valid, praktis dan efektif untuk memfasilitasi kemampuan pemecahan masalah matematis dengan karakteristik e-module berbantuan flip pdf profesional pada materi turunan fungsi aljabar. Penelitian ini adalah penelitian pengembangan yang dilaksanakan dengan model pengembangan Plomp dimana terdiri dari atas preliminary research, prototyping phase dan assesment phase. Penelitian ini dilakukan di SMAN 3 Bukittinggi. Instrument pengumpulan data berupa wawancara, dokumentasi, angket dan soal tes. Data yang diperoleh analisis dengan teknik analisis data kuantitatif dan kualitatif. Karakteristik penelitian ini berupa e-module berbantuan flip pdf profesional pada materi turunan fungsi aljabar kelas XI SMA semester 2 dalam penerapannya menggunakan syntaks yang terdapat dalam model problem based learning untuk meningkatkan kemampuan pemecahan masalah matematis peserta didik. Hasil penelitian menunjukkan bahwa RPP dan e-module berbasis problem based learning yang dikembangkan tergolong valid berdasarkan dari expert review untuk RPP  yaitu sebesar  81.06%  dan e-module sebesar 82.92%. Sedangkan hasil uji praktikalitas  peserta didik dan pendidik adalah 77.82% dan  81.67% dimana e-module dikategorikan praktis.  Selain itu efektivitas pesentase ketuntasan peserta didik yang mengikuti tes kemampuan pemecahan masalah matematis untuk tahapan small group memperoleh persentase ketuntasan sebesar 83.33% dan pada tahap field test memperoleh persentase ketuntasan sebesar 81.82% sehingga dikategorikan efektif.  Sehingga dapat disimpulkan bahwa RPP dan e-module berbasis model problem based learning pada materi turunan fungsi aljabar dikatakan valid, praktis, dan efektif
Pengaruh Kecemasan Matematika Siswa Terhadap Kemampuan Penalaran Matematis Pada Pembelajaran Daring
Authors: Amelia Tasya , Ulfah Syafika
Published: November 2022

Penelitian ini bertujuan guna mengetahui pengaruh kecemasan matematika terhadap kemampuan penalaran matematis pada siswa kelas VIII saat pembelajaran daring dan juga mengetahui profil kecemasan matematika siswa dan kemampuan penalaran matematis. Metode kuantitatif dengan penelitian korelasional digunakan dalam penelitian ini. Peneliti mengambil sampel 450 siswa kelas VIII di SMPN DKI Jakarta. Dalam mengolah data menggunakan teknik analisis deskriptif serta regresi linear sederhana. Hasil dari penelitian ini memaparkan kecemasan matematika berada di kategori sedang dengan 67.3% dan kemampuan penalaran matematis berkategori sedang sebanyak 65.1%. Serta tidak terdapat pengaruh kecemasan matematika terhadap kemampuan penalaran matematis pada siswa kelas VIII saat pembelajaran daring

This study aims to determine the profile and influence of mathematics anxiety on mathematical reasoning abilities in class VIII students during online learning. Quantitative methods with correlational research are used in this study. Researchers took a sample of 450 class VIII students at SMPN DKI Jakarta. In processing the data using descriptive analysis techniques and simple linear regression. The results of this study show that mathematics anxiety is in the moderate category at 67.3% and the mathematical reasoning ability in the medium category is 65.1%. And there is no influence of math anxiety on mathematical reasoning abilities in class VIII students when learning online
Pengembangan Media Pembelajaran Interaktif Menggunakan Model Missouri Mathematics Project Untuk Meningkatkan Kemampuan Komunikasi Matematik Peserta Didik Di Kelas VIII SMP
Authors: Khairunnisa Nurul Maulina , Yerizon Yerizon , Suherman Suherman , Arnawa I Made
Published: November 2022

This research was motivated by the low mathematical communication skills of junior high school students. This study aims to produce Interactive Learning Media using a valid, practical, and effective Missouri Mathematics Project model to facilitate mathematical communication skills. This research is a development research carried out with the Plomp development model. The Plomp development model consists of three stages, namely preliminary investigation, prototyping stage, and assessment phase. This research was conducted at SMP Negeri 3. Data collection instruments in the form of interviews, documentation, questionnaires and test questions. The data obtained are analyzed by quantitative and qualitative data analysis techniques. The results showed that the interactive learning media for mathematics using the Missouri Mathematics Project model developed was classified as a very valid category (86.62% for RPP and 83.93% for media) and very practical at 87% and 86.85% respectively (for RPP and small group media) 88.1% and 88.02% (for RPP and large group media). Meanwhile, based on the test results of the mathematical communication ability test questions, 83.33% of students knew the criteria for the success of the mathematical communication ability test > 80%, meaning that interactive learning media using the Missouri Mathematics Project model was very effective on methematic communication skills
Pengembangan Perangkat Pembelajaran dengan Pendekatan STEM untuk Meningkatkan Kemampuan Pemecahan Masalah Matematika
Authors: Riani Ni Made Shinta Teja , Suweken Gede , Sariyasa Sariyasa
Published: November 2022

Penelitian ini bertujuan untuk (a) mengoptimalkan proses pembelajaran menggunakan perangkat pembelajaran dengan pendekatan STEM, (b) mendapatkan perangkat pembelajaran dengan pendekatan STEM yang berkualitas valid, praktis, dan efektif (c) mengetahui karakteristik perangkat pembelajaran dengan pendekatan STEM. Perangkat pembelajaran yang dikembangkan berupa RPP, LKS, dan instrumen tes hasil belajar dalam upaya meningkatkan kemampuan pemecahan masalah matematika siswa. Metode yang digunakan untuk mengumpulkan data pada penelitian ini yaitu observasi, tes dan angket. Hasil penelitian menunjukkan bahwa proses pembelajaran menerapkan langkah-langkah pendekatan STEM yaitu setting the stage, exploration, key concept, practice & application excercise yang dapat meningkatkan kemampuan pemecahan masalah matematika siswa. Hasil uji validitas, uji kepraktisan, dan uji keefektifan menunjukkan bahwa perangkat pembelajaran masuk dalam kategori sangat valid, praktis dan efektif. Karakteristik yang diperoleh yaitu : (1) RPP disusun secara sistematis, runut, dan runtut, memuat identitas, alokasi waktu, kompetensi inti, kompetensi pembelajaran, indikator, dan tujuan pembelajaran. Langkah pembelajaran mengikuti sintaks pendekatan STEM. Sumber belajar berupa buku siswa dan internet. Penilaian memuat penilaian sikap, pengetahuan, dan keterampilan. (2) LKS memuat identitas siswa, tujuan pembelajaran, petunjuk dan isi LKS. Kegiatan dalam LKS mencerminkan pendekatan STEM dan komponennya dilengkapi dengan langkah-langkah kerja. (3) Instrumen tes hasil belajar memuat permasalahan kontekstual, disesuaikan dengan indikator, tujuan, dan materi barisan dan deret. Tes yang diberikan berbentuk uraian, terdapat kisi-kisi tes dan rubrik penskoran.
Analisis Bibliometrik: Penelitian Augmented Reality Dalam Pendidikan Matematika
Authors: Muhammad Ilham , Marchy Febrinna , Rusyid Husnul Khatimah , Dasari Dadan
Published: November 2022

Penelitian ini bertujuan untuk mengidentifikasi publikasi terkait Augmented Reality (AR) dalam pendidikan khususnya pada bidang Pendidikan matematika dan memvisualisasikannya. Basis data dari dimensions digunakan dalam mengumpulkan publikasi terkait AR dalam Pendidikan matematika dan divisualisasikan dengan VOSviewer, kemudian dianalisis dan dievaluasi berdasarkan pasangan bibliografi negara, pasangan bibliografi Lembaga, pasangan bibliografi jurnal, pasangan bibliografi publikasi, pasangan bibliografi penulis, dan kemunculan bersama kata kunci penulis. Sebanyak 332 publikasi dipilih mengikuti kriteria penelitian dalam 10 tahun terakhir (2012-2021). Hasil penelitian menunjukkan bahwa negara Indonesia (berdasarkan pasangan bibliografi negara), Journal of Physics Conference Series (berdasarkan pasangan bibliografi jurnal), publikasi Ibáñez (2018) (berdasarkan pasangan bibliografi publikasi), dan Salinas, patricia (Inggris) (berdasarkan pasangan bibliografi penulis) menjadi yang paling berpengaruh pada bidang Augmented Reality dalam Pendidikan matematika. Pembelajaran STEM dan materi geometri menjadi kata kunci yang sering muncul dalam bidang ini. Tren penelitian dan kemajuan konsep Augmented Reality dalam pendidikan telah dibahas dalam makalah.
Analisis Kesalahan Siswa SMP dalam Menyelesaikan Tes Literasi Statistik Berdasarkan Tahapan Kastolan
Authors: Sari Marinda Rosita , Sa'dijah Cholis , Sukoriyanto Sukoriyanto
Published: November 2022

Statistika merupakan bagian penting dari kurikulum matematika sekolah dan berperan penting dalam berbagai aktivitas manusia di era globalisasi. Oleh karena itu, semua siswa harus mempelajari statistika sebagai bagian dari pendidikannya. Salah satu tujuan penting pendidikan statistika di sekolah adalah literasi statistik. Namun, pentingnya literasi statistik sebagai kemampuan yang harus dimiliki siswa tidak sesuai kenyataan di lapangan. Beberapa penelitian menunjukkan bahwa kemampuan literasi statistik di sekolah menengah masih rendah. Sebagian besar siswa sekolah masih kesulitan dalam menyelesaikan soal yang berkaitan dengan data yang disajikan dalam bentuk grafik dan tabel dan cenderung melakukan kesalahan. Penelitian ini bertujuan untuk mengetahui kesalahan yang dilakukan siswa dalam menyelesaikan tes literasi statistik berdasarkan tahapan kastolan. Jenis kesalahan yang dilakukan siswa berdasarkan tahapan kastolan meliputi kesalahan konseptual, prosedural, dan teknik. Penelitian ini merupakan penelitian kualitatif dengan berjenis penelitian deskriptif. Subjek penelitian ini adalah 33 siswa kelas IX SMP Negeri 2 Krembung. Pengumpulan data dilakukan dengan memberikan tes literasi statistik. Hasil penelitian menunjukkan bahwa siswa yang melakukan kesalahan teknik sebesar 34%, kesalahan prosedural 22%, dan kesalahan konseptual 21%. Sehingga dapat disimpulkan bahwa siswa melakukan kesalahan konseptual, prosedural, dan teknik dalam menyelesaikan tes literasi statistik. Setiap siswa membuat kesalahan ini berdasarkan indikator yang berbeda-beda.
Developing Interactive Learning Media of Worksheets based on Geogebra Classroom
Authors: Badriyanto Badriyanto , Qohar Abd
Published: November 2022

Technological developments open up opportunities for education to continue to develop, especially during the COVID-19 pandemic, optimal use of technology is necessary. The need for adjustments to the LKPD (student worksheet) which is a learning medium and is an important component in teaching and learning activities to suit the current situation. The results of the observations found that there was no adjustment to this matter. This study aims to develop digital worksheets based on the geogebra classroom on set material, especially set operations. This study uses the DDD-E method with the stages of decide, design, develop and evaluate. The subjects of this research were 32 students of class 7D UM Laboratory Junior High School. The trial process is carried out during class. The digital LKPD (student worksheet) based on the geogebra classroom for set material, especially on set operations, has been developed. The developed learning media has been validated and obtained a media validation score of 3.49 and material validation 3.45 which indicates that this media is valid. The results of the practicality test obtained from the questionnaire distributed to students got a score of 3.24. As for the effectiveness of getting a score of 3.25 and help 78% of all students reach a KKM. This shows that the media developed is both practical and effective. Based on the results of validation, effectiveness and practicality, the developed digital worksheet based on the geogebra classroom can be used to study the topic of set operations. 45 which indicates that this media is valid. The results of the practicality test obtained from the questionnaire distributed to students got a score of 3.24. As for the effectiveness of getting a score of 3.25 and help 78% of all students reach a KKM. This shows that the media developed is both practical and effective. Based on the results of validation, effectiveness and practicality, the developed digital worksheet based on the geogebra classroom can be used to study the topic of set operations. 45 which indicates that this media is valid. The results of the practicality test obtained from the questionnaire distributed to students got a score of 3.24. As for the effectiveness of getting a score of 3.25 and help 78% of all students reach a KKM. This shows that the media developed is both practical and effective. Based on the results of validation, effectiveness and practicality, the developed digital worksheet based on the geogebra classroom can be used to study the topic of set operations.
Energy renovation of historic buildings in New Zealand: Towards a holistic method for reducing environmental impact
Authors:   , Filgueiras Paschoalin Rachel
Published: November 2022

As nations develop CO2 reduction targets, the energy renovation of historic and heritage buildings has been seen as an opportunity to reduce energy and Greenhouse Gas (GHG) emissions while preserving these buildings' historic values and character. Climate Change concerns are emphasising the built heritage environmental issues, resulting in both environmental and social benefits. Internationally, many countries have adopted energy retrofit policies, and there has been an increasing number of projects and published material on the energy renovation of historic buildings. However, New Zealand (NZ), unlike Europe and USA, has no country-specific policies or guidelines for historic retrofit considering social, cultural, environmental and economic aspects.

This research explores whether NZ would benefit from adopting similar guidelines from a policy and practice perspective. It discusses the environmental, economic and social benefits of such guidelines, and the country-specific requirements for adopting energy renovation guidelines for historic buildings. This research initially applies the existing European renovation process onto three hypothetical energy retrofits of heritage buildings in Wellington, NZ. These case studies, coupled with experts’ interviews, investigate the benefits and limits on the application of a specific procedure, multiple criteria assessments, some recommended methods and risk analysis for the renovation process. It also reveals possible trade-offs among different assessment criteria (e.g. energy, cost, thermal comfort, carbon footprint and heritage impact), and desirable modifications in the whole process of adapting it to the NZ national context.

This research concludes that adopting tailored retrofit guidelines can contribute to the national goal of reducing GHG emissions by 2050 and, at the same time, protect historic buildings from demolition. The interviews support energy retrofit guidelines for historic buildings as good practice and reveal experts’ recommendations, the perceived benefits and barriers to adopting country-specific renovation guidance. It concludes with the proposal of preliminary guidelines for energy retrofitting houses in NZ.
Experiences of Potentially Morally Injurious Events among New Zealand Defence Force Personnel
Authors:   , Henderson Danielle
Published: November 2022

Help-seeking for mental health concerns, and the barriers that individuals encounter that prevent them from help-seeking, are particularly important to address within the military. Among other reasons, untreated mental health concerns have been associated with increased homelessness, alcohol abuse, and relationship breakdowns (Dandeker, et al., 2003; As cited in Walker, 2010). Within the New Zealand Defence Force (NZDF) context, barriers to help-seeking have been associated with experiencing greater psychological distress (Hom, et al., 2020). One specific form of distress that has the potential to impact the overall well-being of NZDF personnel is moral injury - the harm that occurs to individuals when an event occurs that conflicts with that individual’s personal beliefs or morals (MacDonald, et al., 2018).

The purpose of this research is to identify the impact of moral injury on NZDF personnel, and specifically how it impacts help-seeking behaviours. The role of guilt and shame was examined as the driving force behind this relationship. A survey of 4092 NZDF personnel was examined, 1947 of whom had been deployed. Of the deployed individuals, 23.6% had reported exposure to a potentially morally injurious event (PMIE), and 18.2% had experienced guilt or shame over an event whilst on deployment. Counter to expectations, there was no significant relationship found between PMIEs and future help-seeking intentions, nor did guilt mediate the relationship between PMIEs and help-seeking. However, concerns regarding the impact that help-seeking would have on one’s career (professional concerns) functioned as a suppressor variable and, once included, accounted for 36.2% of the relationship between PMIEs and help-seeking. Further, emotions of guilt and shame were found to account for 49.2% of the variance in PMIEs and the barrier of professional concerns. These findings suggest that the role that guilt and shame have on the relationship between PMIEs and help-seeking occurs indirectly, through the relationship between PMIEs and career concerns.

The role of guilt and shame was complex, and included associations with help-seeking - for individuals who held professional concerns, help-seeking decreased. However, for individuals who held less professional concerns, help-seeking increased. Guilt and shame also protected against the relationship between PMIEs with distress and mental health concerns in a moderation, and enhanced relationship warmth for individuals who had experienced a PMIE. This suggests that experiencing guilt and shame whilst on deployment may also have positive implications on an individual’s overall well-being, as opposed to a purely negative impact. The protective aspect of guilt and shame should be further explored within soldiers' pre-deployment training, so they are better prepared for the possibility of experiencing these adverse emotions, and to explain how both guilt and shame can serve a beneficial purpose.
Metagenomic exploration of Mycale hentscheli microbiome secondary metabolite biosynthesis.
Authors:   , Storey Mathew
Published: November 2022

The natural environment is replete with potent bioactive organic molecules that are produced by the microorganisms that inhabit it. These so-called secondary metabolites provide niche advantages to the producers and have been exploited by mankind for their medicinal and industrial value, especially as antibiotic and antiproliferative agents. One particular environment that has proven to be a rich source of secondary metabolites are certain species of marine sponge, or more specifically, their microbial symbionts. The New Zealand marine sponge Mycale hentscheli is the source of at least three secondary metabolite like molecules, pateamine, peloruside and mycalamide which have spurred much research interest due to their potent bioactivity. However, the exact origin and genetic factors responsible for the production of these molecules remains unknown.

In this study undertake a metagenomic drug discovery campaign employing multiple sequencing strategies to reveal that these compounds are produced by multiple members of the sponge’s symbiont microbiome. This is in contrast to previously studied sponges where the secondary metabolites are produced by a single species of microorganism. By analysing the biosynthetic gene clusters in their wider genomic context we found the production of the secondary metabolites was achieved by canonical and non-canonical biosynthetic mechanisms. This approach also shed light on an additional repertoire of biosynthetic potential within this already secondary metabolite-rich sponge and provided the complete genomes of novel taxa.

In addition to furthering our understanding of secondary metabolite biosynthesis, we anticipate that the elucidation of the genetic factors responsible for producing the secondary metabolites of M. hentscheli will foster research into their sustainable production by contributing to advances in synthetic biology, heterologous expression and culturing technologies.
Changes in lifestyle behaviour and dietary patterns among Iranian medical students during COVID-19 lockdown
Authors: Soltani Afsaneh , Samieefar Noosha , Akhlaghdoust Meisam
Published: November 2022

Background: The COVID-19 pandemic has affected many aspects of human life, including physical and mental health. The public health measures to prevent COVID-19 transmission led to social isolation, physical inactivity, anxiety, depression, sleep disorders, obesity, and consumption of unhealthy food. Aims: To evaluate changes in lifestyle behaviour during the fifth wave of COVID-19 in Iranian medical students. Methods: This was a cross-sectional descriptive study. In September 2021, an online questionnaire containing 32 questions was administered to 1143 medical students in Teheran universities. Some 286 completed copies of the questionnaire were excluded because of incomplete answers. Descriptive statistics of central tendency measures and dispersion were used and independent t-test and a Chi-square test between two variables were conducted. Statistical analysis was performed using SPSS version 24. Results: A total of 462 (53.9%) students had COVID-19 during the fifth wave of the disease, 657 (76.7%) were deprived of social and sports activities, and 278 (32.4%) had difficulty completing their academic studies. Students who took vitamin supplements experienced lower levels of stress and 711 (83.0%) reported bodyweight change. There were significant relationships between bodyweight change, stress level and hospitalization due to COVID-19. There was a significant relationship between smoking, bodyweight change and hospitalization rate. A total of 426 (50.3%) students did not have a regular sleep–wake pattern, 701 (81.8%) spent more time using social media, 197 (23.0%) consumed more fast food, and 674 (78.6%) experienced stress or anxiety. Conclusion: There was an increased tendency towards unhealthy lifestyle among medical students in Tehran during COVID-19 lockdown. These findings can be useful in assessing lifestyle behaviours among students and in planning for improvements.
Mothers’ perceptions of their children’s weight: opportunity for health promotion in Kuwait
Authors: Al-Taiar Abdullah , Alqaoud Nawal , Sharaf-Alddin Reem , Akpinar-Elci Muge
Published: November 2022

Background: Mothers’ perceptions of their children’s weight remain mostly unknown in oil-rich countries of the Middle East. Aims: To compare maternal perceptions of their children’s weight with actual body weight. Methods: We used the Kuwait nutritional surveillance data for 5 consecutive years (2015-2019) (N = 5119), which were collected through face-to-face interviews with mothers of children aged 2-5 years attending vaccination centres. Results: Of the 5119 mothers in the study, 163 (3.18%) and 332 (6.48%) had obese or overweight children, respectively. Among 4624 mothers who had normal weight children, 1350 (29.20%) perceived their children’s weight as below normal. Seventy-nine (48.47%) and 16 (9.82%) mothers of children with obesity thought their children had normal weight or were underweight, respectively. Conclusion: Mothers in Kuwait often underestimate the weight of their children, including those children who have normal weight. This highlights the importance of addressing maternal misperceptions during visits to the primary healthcare centre.
External quality assessment of laboratory performance in bacteriology in the Eastern Mediterranean Region, 2011–2019
Authors: Squires Raynal C. , Al Abri Ali , Al-Rashdi Azza , Al Jaaidi Aisha , Al Harthi Omaima , Cognat Sebastien , Oxenford Christopher , Asghar Humayun , Nahapetyan Karen , Ghoniem Amany , Konings Frank , Al Jardani Amina
Published: November 2022

Background: Since 2007, national public health laboratories in the WHO Eastern Mediterranean Region (EMR) have participated in a regional external quality assessment scheme in bacteriology to improve testing proficiency. Aims: To assess laboratory performance in bacteriology in the EMR between 2011 and 2019 using the regional external quality assessment scheme. Methods: We analysed the accuracy of participant-reported data in bacterial identification, Gram stain microscopy, and antimicrobial susceptibility testing. For each category, we assessed the performance over time, the performance on multiple organisms, and whether a laboratory repeatedly failed to attain satisfactory results. Results: Between 2011 and 2019, 70% of laboratories achieved satisfactory performance for bacterial identification and antimicrobial susceptibility testing, and 85% performed satisfactory Gram stain microscopy. Testing did not improve on multiple organisms and results were consistently low for some pathogens and test categories. Twenty-nine percent of laboratories underperformed throughout the study period. Conclusion: The unchanged performance over time and underperformance of laboratories highlight the need for improvements in the regional external quality assessment scheme. Participating laboratories and WHO need to work more actively to strengthen the problem areas.
Block Laying Heights and Physiological Indices in Masonry Work
Authors: AMİNE Daniel Joel , OWHOR Sampson Chisa , AZODO Adinife
Published: November 2022

This study investigated the physiological response functions of the masons during masonry work using three standard sizes of construction block weights at varying working heights. The assessment involved a repeated job handling design approach. The participants in this study were 12 masons who had at least one year of experience in working with sandcrete blocks and burnt bricks. Each participant constructed 20-block walls, 7 courses high using 9 inches and 6 inches sandcrete blocks and 20-block wall, 11 courses high using burnt bricks. The physiological response data measured were heart rate, body temperature and blood pressures (systolic and diastolic) at each wall height constructed. The ergonomic investigation principle of the work factors affecting masonry work was hinged on known physiological indices (oxygen consumption and energy expenditure rate) to evaluate the degree of the effects of the task on masons. The result obtained showed that the masons experienced different levels of stresses at ground level to knee height, knee height to chest height and neck height while working with the 6 and 9 inches sandcrete blocks. The building construction using burnt bricks recorded varied results, as there were no differences in body temperature, heart rate and blood pressure throughout the wall height. This study concluded that the construction block weights have effect on the physiological response functions of the masons at varying working heights.
Study of Wind Power Plant for Alternative Energy in Vannamei Litopeneaus Shrimp Cultivation
Authors: Nisworo Sapto , Pravitasari Deria , Kusworo Zulfikar Aji , Ashari Ashari , Khan Naseer A
Published: November 2022

The focus of this research is to utilize wind energy for power generation as an electric power service for shrimp farming in the Kulon Progo district of Yogyakarta. This is done in order to minimize the use of diesel fuel in daily operations to drive the aerator pump that produces air bubbles and needs lighting. The method used is to calculate the need for electrical power in 24 hours, plan the windmill according to the local average wind speed. Parameters for measuring the final result are net present cost (NPC), cost of energy (CoE), and payback period. The scenario is used by installing a wind power generator compared to a generator from a diesel engine. The results of the study with a wind power generation system capable of producing 41755,07kW/year of power with the NPC value having a more efficient economic value of Rp. 158,254,000.00, a more efficient CoE value of Rp. 477.41, and for a diesel power plant of Rp. 1,569,015,240.00 and CoE worth Rp5,867,45. The payback period for the scenario with wind power is 3 years and 9 months and and 15 years 7 months for the scenario with diesel power plants.
Analysis Oil Condition of Transformer PT-8801-A by Using the Method TDCG, Rogers Ratio, Key Gas, and Duval Triangle: A Case Study at PT. Perta Arun Gas
Authors: Furqaranda Rastra , Bintoro Andik , Asri Asri , Al-Ani Waleed Khalid Ahmed , Shrestha Ashish
Published: November 2022

The power transformer would have happened disturbanced that can cause a failure at a transformer. For this condition needed to maintenance power transformer, one of which is by analyzing transformer oil by using the TDCG method. This analysis is carried out to determine the diagnosis of faults in the transformer. This method are the condition of the analysis which is based on the amount of a gas dissolved on oil a transformer. This study used four methods for transformer failure analysis are TDCG method, Rogers-ratio, gas key, and duval triangle. The results obtained by the TDCG method of dissolved   gas are 1332 ppm, the roger’s ratio result a symptom of oil heat a transformer at 300oC, the key gas method results in overheating of oil, and the duval triangle method results in a low breakdown voltage analysis.
Design and development of 10 WP Solar panel tracking system based on RTC and Arduino
Authors: Sibarani Esron S. , Maizana Dina , Mungkin Moranain , Isa Muzamir , Pandey Govinda Prashad
Published: November 2022

Currently, the use of solar panels in Indonesia is still in a stationary position (static) so that the absorption of sunlight is less than optimal due to frequent weather, cloudy weather, and during the afternoon until the afternoon the sun’s light has turn back/or is not parallel to the solar panels. To obtain optimal electrical energy, the solar panel systems must be equipped with a control-systems and equipped with an RTC (Real Time Clock) sensor module which functions to provide real time data/or components to adjust the direction of the surface of the solar panel so that it always faces the sun at a given angle (tracking based on the movement of the earth) so that the energy from the sun’s ray can completely fall to the surface of the solar panel. And from the data obtained on December 13, 2021, the output produced by a 10 Wp solar panel tracking system for 9 (nine) hours with a 5 Watt lamp load produces a total power of 3.392 Wh while a non-tracking 10 Wp solar panel produces a total power of 19.658 Wh and the difference between the two 10 Wp solar panels is 15.732 Wh.
Role of Renewable Energy Sources in the World
Authors: N.S. Mammadov , N.A. Ganiyeva , G.A. Aliyeva
Published: November 2022

The severe climate crisis on the planet has led to the need to quickly abandon fossil fuels and switch to alternative energy, "green" energy sources. This article discusses the main types of alternative energy. It is shown that new types of energy play an important role in the energy supply systems of most countries of the world, and in the future they can become the main sources of energy to meet the growing needs of the world economy. The main reasons for the growing interest in RES are revealed. Their advantages and disadvantages are considered, on the basis of which you can find out which one is the most profitable. The ways and purposes of using solar energy and wind energy are given. The advantages of renewable energy sources in comparison with traditional energy sources are considered.
Three Phase Induction Motor Rotation Direction Control Using PLC Omron CP1E and HMI NB7W-TW00B
Authors: Nrartha I Made Ari , Riswandi Muhamad Nudisantana , Supriono Supriono
Published: November 2022

Rotation direction control on three-phase electric motors is very much needed in industry as driving machines such as mixers, grinders, conveyors, and transportation machines. This study proposes controlling the rotational direction of a three-phase induction motor automatically using an Programmable Logic Control (PLC) Omron CP1E which is connected to the Human Machine Interface (HMI) NB7W-TW00B. The HMI NB7W-TW00B provides timing instructions to the PLC to change the direction of rotation of the induction motor. To provide safe operation of the induction motor due to changes in the direction of rotation, the PLC control was given a delay of 1 to 4 seconds. The results show that a delay of 1 to 4 seconds provides a linear reduction in speed before the motor rotates in the opposite direction.
Modelling Demand for Energy Sources as Alternative Energy in the Province of North Sumatra
Authors: Nugraha Yoga Tri , Irwanto Muhammad
Published: November 2022

Energy is needed to support daily human activities. Energy usage for the necessities of life is always increasing every year. So far, the energy used comes from fossils, namely coal and oil. Every year fossil energy reserves are decreasing. To overcome these problems, a potential alternative energy source that can replace fossil energy is needed, namely renewable energy. Potential of renewable energy is one of the alternative sources of energy supply and security in the Province of North Sumatra. To ensure the resilience of renewable energy to run sustainably. It is necessary to analyze the potential of renewable energy in North Sumatra by using the Long-range Energy Alternatives Planning System. The results obtained show that North Sumatra has a great potential of energy sources as alternative energy, namely hydro energy and wind energy. It is forecasted that for the year 2027, hydro energy has a potential growth of 3,7 million megawatt-hours and wind energy has a potential growth of 2,2 million megawatt-hours.
Genetic algorithm-based multi-objective optimization model for software bugs prediction
Authors: Musinat Bakre Oluseye , JOHNSON FEMI Temitope , Folorunso Olusegun , Ezinne Ihekwoaba
Published: November 2022

The accuracy and reliability of software are critical factors for consideration in the operation of any electronic or computing device.  Although, there exist several conventional methods of software bugs prediction which depend solely on static code metrics without syntactic structures or semantic information of programs which are more appropriate for developing accurate predictive models.  In this paper, software bugs are predicted using a Genetic Algorithm (GA)-based multi-objective optimization model implemented in MATLAB on the National Aeronautics and Space Administration (NASA) dataset comprising thirty-eight distinct factors reduced to six (6) major factors via the use of the Principal Component Analysis (PCA) algorithm with SPSS, after which a linear regression equation was derived. The developed GA- based multi-objective optimization model was well-tried and tested. The accuracy and sensitivity level were also analyzed for successful bug detection. The results for optimal values ranging from   95% to 97% were recorded at an average accuracy of 96.4% derived through MATLAB-implemented measures of critical similarities. The research findings reveal that the model hereto proposed will provide an effective solution to the problem of predicting buggy software in general circulation.
Experimental study on HHO electrolyzer efficiency – influence of the number of plates and their distance
Authors: Nikolov Kalin , Simov Mihail , Streblau Maik Jurgen
Published: November 2022

The present paper explores the factors influencing the efficiency of an HHO-gas-electrolyzer. The experiments were held in the respective laboratory at the Technical University of Varna with a principal focus on two of these factors –i.e., distance between the plates and the number of plates in a wet electrolyzer. The scientific tests were performed with all the remaining conditions being held constant and the appropriate results were obtained and visualized to disclose the most efficient electrolyzer setups.
Experimental Study of the Characteristic of a PEM Reversible Fuel Cell
Authors: Gugov Dimitar , Todorov Marin , Streblau Maik Jurgen , Dimova Tatyana
Published: November 2022

Renewable energy sources are the proper way to protect and preserve the natural resources of the only planet we inhabit. The fuel cell is an interesting solution in the field of renewable energy sources. These devices convert the chemical energy from hydrogen and oxygen into electrical and thermal energy.  The present paper, therefore, focuses exclusively on their ability to generate electricity, their energy efficiency, quiet mode of operation, and environmental compatibility.  The polymer electrolyte membrane fuel cell coverts the energy at high density of power. The weight and cost of this cells are lower than the other kind of fuel cell. A reversible proton exchange membrane fuel cell is a kind of PEM fuel cell. It can operate in two modes - fuel cell mode and electrolyzer mode. Presented in the current paper are the experimental studies conducted into the operation of the fuel cell in electrolyzer and fuel cell mode. The relevant parameters and characteristics obtained from experiments are analyzed in relation to the mode of operation.
Diagnostic System for Asynchronous Motors and Synchronous Generators Operating in Autonomous Mode Developed through the Use of DAQ Devices and Labview Programming Environment
Authors: Gyurov Valentin Nikolov , Duganov Milen , Yordanov Yuliyan
Published: November 2022

The paper explores the possibilities for the use of DAQ devices in developing specialised diagnostic systems for monitoring and diagnostics of electrical equipment with asynchronous electric drives and autonomous synchronous generators. The primary focus is on the construction of a system responsive to different complementary diagnostic methods, such as the spectral current- voltage analysis, Park's method, instantaneous power theories, etc. Such a system might be applied locally (discretely) and/or conjointly in a centralized equipment monitoring system with the use of the LabView platform.
Metaphoric Perceptions of Adults on Digital Concepts in Education
Authors: YURDAKAL İbrahim Halil
Published: November 2022

In this study, it is aimed to determine how teachers and teacher candidates perceive the concepts related to technology, which have been used frequently in recent years. In this context, metaphorical perceptions of technology, metaverse, virtual reality, augmented reality, hybrid education and distance education were investigated. The sample of the study, which was prepared in accordance with the qualitative research design, consists of teachers working in the central district and districts of Denizli and teacher candidates studying at a public university. The sample of the study consists of 86 adults. 22 of the participants are teachers, 64 of whom are prospective teachers, 72 of whom are females and 14 are males. The data of the research were collected via the form prepared by the researcher. The questions in the form are framed as “metaverse for me….. because….". In addition, explanations consisting of short sentences about the concepts were also requested from the participants. Research data were analyzed with inductive content analysis. According to the results of the research, it is seen that when adults present metaphors about concepts, they especially refer to their functions. Besides, when the views and metaphors are examined, it could be stated that there are problems regarding the distinction of metaverse, virtual reality and augmented reality phenomena. In general, it can be said that adults' perceptions of technology, metaverse, virtual and augmented reality, distance education and hybrid education are positive. According to the research, especially, the perceptions that socialization problems could be seen in metaverse and virtual / augmented reality applications are remarkable.
Pengaruh Model Pembelajaran Kooperatif Tipe Numbered Head Together Berbantuan Media Manipulatif terhadap Hasil Belajar Matematika Siswa Kelas IV SD Tahun Pelajaran 2022/2023
Authors: Masita Masita , Nurhasanah Nurhasanah , Tahir Muhammad
Published: November 2022

Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran kooperatif tipe numbered head together dengan berbantuan media belajar manipulatif terhadap hasil belajar matematika siswa kelas IV SD materi keliling dan luas bangun datar persegi serta persegi panjang. Penelitian ini menggunakan penelitian eksperimen, jenis Pre-Ekperimental Design tipe one group pre-test post-test Design. Subjek dalam penelitian ini adalah siswa kelas IV SDN 61 Karara Kota Bima yang berjumlah 25 siswa sebagai kelompok eksperimen. Teknik pengumpulan data dalam penelitian ini adalah observasi, tes, dan dokumentasi dengan instrumen pengumpulan data yaitu menggunakan lembar observasi, dokumentasi dan tes hasil belajar kognitif (pretest-posttest) sebanyak 10 butir soal yang telah memenuhi validitas. Adapun teknik analisis data yang digunakan yaitu uji normalitas Shapiro-Wilk,uji homogenitas Levene dan uji hipotesis dependent sample t-test atau paired sample t-test. Dari hasil pengujian hipotesis bahwa nilai thitung sebesar 11,243 dan nilai ttabe sebesar 2,064 sedangkan nilai signifikansi (2-tailed) sebesar 0,000 yang dimana < 0,05 maka Ho ditolak dan Ha diterima. Hal ini menunjukkan ada perbedaan hasil belajar siswa sebelum diberikan perlakuan dan setelah diberikan perlakuan menggunakan model pembelajaran kooperatif tipe numbered head together berbantuan media manipulatif. Sehingga dapat ditarik kesimpulan bahwa terdapat pengaruh yang signifikan pada penggunaan model pembelajaran kooperatif tipe numbered head together berbantuan media manipulatif terhadap hasil belajar matematika siswa kelas IV SD tahun pelajaran 2022/2023.
O diálogo entre o intestino e o cérebro e o uso terapêutico dos psicobióticos nos transtornos de depressão
Authors:   , SANCHES PRISCILA
Published: November 2022

A depressão compreende um grave problema de saúde pública em todo o mundo, devido às elevadas taxas de prevalência, comorbidades e mortalidades relacionadas, caracterizando-se sobretudo pela manifestação de incapacidade na condução de atividades rotineiras. Neste aspecto, o conhecimento das potencias causas relacionadas ao desencadeamento da depressão mostra de suma importância, pois pode contribuir para o delineamento de estratégias terapêuticas mais apropriadas ao perfil clínico do paciente. Sob tal perspectiva, o presente trabalho apresentou o objetivo de av?l??r ??r m??? d? uma r?v??ã? b?bl??gráf??? descritiva narrativa, o potencial terapêutico relacionado ao uso de psicobióticos sobre indivíduos com transtornos de depressão. Para isto, foram realizadas buscas em bancos de dados digitais nacionais e internacionais, a fim de se identificar e caracterizar a relevância da temática para as comunidades médicas e científicas na contemporaneidade. Inicialmente, foi demonstrado que a composição da microbiota intestinal se apresenta como um relevante fator que influencia sobre a susceptibilidade do paciente manifestar um quadro depressivo, visto que bactérias maléficas podem prejudicar o funcionamento do eixo-cérebro intestino. Dessa forma, estudos recentes indicaram que a suplementação com psicobióticos representa uma valiosa abordagem terapêutica complementar para o tratamento de portadores de transtornos de humor, melhorando significativamente o quadro sintomatológico relacionado. Sendo assim, a abordagem terapêutica com psicotrópicos foi apresentada como uma temática ainda recente e em ascensão, mas com grande potencial terapêutico sobre a promoção da saúde e de uma melhor qualidade de vida a indivíduos depressivos.
Regiões Ultraperiféricas Atlânticas: ponte(s) entre a UE e os EUA
Authors: Valente Isabel Maria Freitas , Amaral João Bosco Mota , Furlin Marcelo , Aragão Alexandra , Hernández Gustavo , Fontes Paulo Vitorino , Rodrigues Paulo Miguel , Moreira Júlio Braga , Nascimento Eliane Cristina da Silva , Andrade Luís Vieira , Rocha Miguel de Oliveira Estanqueiro , Fortuna Mário
Published: November 2022

Na primeira parte da obra realizam-se uma análise histórico-política do conceito de Regiões Ultraperiféricas Europeias, uma metamorfose linguística associada a uma análise filosófica de um neologismo conceptual – o conceito de cidadania pleniférica - e uma experiência de expansão ontológica do conceito de ultraperiferia do restrito âmbito europeu para o âmbito mundial.
A segunda parte da obra aborda uma caraterística intrínseca das regiões ultraperiféricas portuguesas: a autonomia. A partir de localizações geográficas diferentes (Açores e Madeira), mas transmitindo pontos de vista comparáveis, os autores que estudam a autonomia assumem posições convergentes sobre os processo de autonomização e integração.
A terceira parte da obra aborda os grandes temas da produção e a reprodução da ultraperiferia. Produção, no sentido dos processos de influência interna e internacional dos órgãos das regiões ultraperiféricas perante o poder nacional e perante os poderes europeus com vista à definição dos contornos do seu estatuto, com vista à ampliação dos seus direitos.
A parte quarta da obra configura um exercício prático de avaliação da importância geoestratégica das RUPs, e muito particularmente dos Açores, para a segurança europeia, numa perspetiva histórica que não ofusca uma abordagem crítica do momento atual de guerra na Europa. A encerrar, uma perspetiva sobre o futuro da União Europeia no plano interno e mundial.
Public perceptions about home delivery of medications service in Lebanon: A cross-sectional survey
Authors: Abu-Farha Rana , Alzoubi Karem H , Mukattash Tareq , Karout Samar , Itani Rania , Nassar Razan I , Barakat Muna
Published: November 2022

Objectives: To investigate the public’s perception of home delivery of medication service offered by community pharmacies in Lebanon and to assess factors affecting the use of this service.

Methods: The present study represents a cross-sectional online survey study that took place in April-May 2022. The survey was uploaded on the google form platform and was distributed on popular social media platforms (Facebook and WhatsApp). Participants were asked to fill out the questionnaire to evaluate their awareness and perception of home delivery of medication service. Statistical analyses were performed using SPSS version 22.

Results: During the study period, 517 participants agreed to fill out the study questionnaire. Only 18.4% of the study’s participants (n=95) had previously utilized home delivery of medications service. The majority of the participants believed that home delivery service made pharmacists less accessible to answer questions (n=332, 64.2%), and prevented pharmacists from explaining important points about prescriptions (n=322, 62.3%) compared to in-store refills. The main disadvantage of the service as perceived by the participants that home delivery of medications services is associated with the excessive cost of transporting medication (n=385, 74.5%), while the main advantage of this service is its ability to serve sick patients, elderly, disabled people (n=460, 88.9%). Finally, being female, being a university graduate or above, or having a monthly income of more than 500$/month are significantly associated with utilizing home delivery of medication service (p≤0.05).

Conclusion: The majority of the Lebanese participants reported not utilizing the home delivery of medication service before, however, they have positively perceived medication home delivery service as an efficient pharmaceutical service. Serious efforts are needed by health policymakers to facilitate the implementation of this service in Lebanon.