bluuebunny/crossref_metadata_2025 huggingface dataset:
TEKNIK PEMBESARAN IKAN NILA (Oreochromis niloticus) SISTEM AKUAPONIK DI OPO Q FARM CACABAN, KOTA MAGELANG, PROVINSI JAWA TENGAH
Authors: Amalia Ayu Rizki , Ramli Taufik Hadi , Restiana Ayu Dea , Priyadi Hermawan Gatot , Anggoro Agung Doni , Purwanto Purwanto
Published: October 2024

Tilapia, also known as Oreochromis niloticus, is an important commodity in Indonesia that contributes to national food security, economic sustainability and community welfare. The aim of this research is to determine techniques for rearing tilapia cultivation using an aquaponic system. The aquaponics system uses water from fish farming ponds which is channeled through pipes for cultivating plants. This research uses an observation and active participation methodology, namely going directly to the field during tilapia (Oreochromis niloticus) rearing activities using an aquaponic system at OPO Q Farm Cacaban, Magelang City. The research results show that the aquaponics system is an effective method for cultivating tilapia. The process includes preparing the tilapia cultivation container, lettuce plant container, sowing the lettuce plants, stocking the fish, filling the lettuce seeds into the netpot container, providing food, and checking the water quality. The aquaponics system produced a high FCR of 1.06 tilapia, a survival rate of 99%, and a lettuce yield of 47.5 kg. The water quality of the aquaponic system is considered ideal, with temperatures ranging from 23-26°C, pH 6.5-7.5, DO 5.74-6.76 mg/L, and Ammonia 0 ppm. Lettuce plants effectively absorb food and fish metabolic waste, thereby ensuring that the water quality in the aquaponic tilapia cultivation medium is maintained.
PERTUMBUHAN SPIRULINA PADA BERBAGAI PERLAKUAN MEDIA KULTIVASI (REVIEW)
Authors: Diniariwisan Damai , Muahiddah Nuri
Published: October 2024

Potential using of single cell proteins in life increasingly has great potential. Spirulina sp. as a microalgae which contains high levels of nutrients such as protein, fat and minerals has become superior for cultivation. Many benefits in various fields, including fisheries, health, cosmetics and industry, have resulted in a lot of research being carried out to increase cultivation production. Various research sources have been summarized to find out how various media treatments influence the growth and density of spirulina. Through various cultivation media treatments and also the addition of various fertilizers as nutrients, variations in spirulina growth density are produced. In general, Spirulina sp. prefers media with normal pH that tends to be alkaline, namely 7-10. As for the salinity range, they are able to grow in high salinity range of 15-30 ppt. Application of organic and inorganic fertilizers can produce higher density. On a semi-mass media scale of 100 liters, the addition of a combination of ±100 g of inorganic fertilizer showed growth that continued to increase even until the 15th day. The use of organic fertilizer, especially from bird droppings, shows the highest density compared to chicken, cow and buffalo manure. Using organic fertilizer can be more recommended alternative, because it uses natural or organic ingredients that come from nature.
Fabrication of Carbon Paste Electrode Modified with ZnO Nanoparticles and Nanobentonite for Analysis of Bisphenol A by Cyclic Voltammetric
Authors: Febriyana Andini , Setiarso Pirim
Published: October 2024

The Bisphenol A (BPA) is a 2,2-bis(4-hydroxyphenyl) propane compound that is produced on a large scale for industrial applications, particularly in polycarbonate plastics. BPA molecules can migrate from plastics into food if stored at high temperatures and for extended periods. Various methods have been developed for BPA analysis, including cyclic voltammetry. This study focuses on the fabrication and application of a carbon paste electrode (CPE) modified with ZnO nanoparticles and nanobentonite for the analysis of BPA in polycarbonate-based bottled drinking water using cyclic voltammetry. The results showed that the optimal electrode conditions were: electrode composition 3:4:1:2 (carbon: nanobentonite: ZnO nanoparticles: paraffin), and pH 7. The BPA content obtained by cyclic voltammetry for brands A, B, and C was 0.2102; 0.1752; and 0.2210 mM. These results demonstrate that cyclic voltammetry with a ZnO nanoparticle and nanobentonite modified carbon paste electrode can be used for BPA analysis.
Isolation of Na-alginate from Brown Seaweed (Padina sp.) and Synthesis of Na-alginate-chitosan Polyelectrolytecomplex (PEC) Film as Methylene Blue Adsorbent
Authors: Rahayu Rahayu , Bandjar Adriani , Nurlete Samsul , Sohilait Mario Rowan , Baunsele Anselmus Boy
Published: October 2024

Na-alginate has been isolated from brown seaweed (Padina sp.) and then used to make na-alginate-chitosan complex polyelectrolyte films as methylene blue adsorbent. Characteristics of na-alginate, chitosan, and PEC films before and after adsorption were carried out using an FT-IR spectrophotometer. Na-alginate-chitosan PEC film was made by mixing a 0.3% (w/v) Na-alginate solution with a 1% (w/v) chitosan solution with a chitosan-alginate volume ratio (1:3). The film formed was tested for its resistance in pH 3-11 for 7 days and showed that the film could survive in acidic or alkaline media. The adsorption study carried out resulted in maximum concentration data occurring at 75 mg/L with a capacity of 30.2768 mg/g.
Analysis of Caffeine, Tannin and Total Phenol Content of Tea Leaves from Sirah Kencong Blitar Plantation
Authors: Dikatoru Ravendha , Widayanti Elok , Ikayanti Retno
Published: October 2024

Caffeine, tannins, and total phenol are chemical components of tea leaves that are beneficial for the body. Caffeine is a psychoactive substance, tannin is anti-diarrhea, and phenol compounds are antioxidants that prevent free radicals. The purpose of this research was to analyze the levels of caffeine, tannin, and total phenol of tea leaves at Sirah Kencong Blitar Plantation. Determination of the caffeine level was carried out in tea leaves powder using UV-Vis Spectrophotometry method at 273.5 nm wavelength with caffeine as a standard. The determination of tannin and total phenol levels was carried out using the ethanol extract of tea leaves. Tannin was determined by the Follin Denis method using UV-Vis spectrophotometry at 649.9 nm wavelength with tannic acid as a standard. The total phenol was determined by the Follin Ciocalteu method using UV-Vis spectrophotometry at 794 nm wavelength with gallic acid as a standard. Based on the results of the research in tea leaves from the Sirah Kencong Blitar Plantation, the caffeine content was 1.649%, tannin was 7.095%, and total phenol was 34.142%.
Faktor-Faktor Yang Memengaruhi Perilaku Penggunaan Fitur PayLater pada Aplikasi Shopee (SPayLater) Dengan Model UTAUT2
Authors: Awdes Oca Amartya , Surya Firman , Zahara Zahara
Published: October 2024

This study aims to determine the factors that can influence the behavior of using the paylater feature in the Shopee application (SPayLater) using the Unified Theory of Acceptance and Use of Technology 2 (UTAUT2) model. The factors used in this study are performance expectancy, effort expectancy, social influence, facilitating conditions, hedonic motivation, price value, and habits. Respondents of this study were Politeknik Negeri Padang students who used the paylater feature in the Shopee application (SPayLater). The data used is primary data obtained using a survey technique by distributing online questionnaires via google form. Analysis of research data using multiple linear regression analysis with the help of the IBM SPSS version 25 program. The results showed that performance expectancy and habits had a positive effect on the behavior of using the Paylater feature on the Shopee application (SPayLater), while the factors of effort expectancy, social influence, facilitating conditions, hedonic motivation, and price value do not have a positive effect on the behavior of using the paylater feature on the Shopee application (SPayLater ).
Analisis Pengaruh Penghargaan Finansial, Pertimbangan Pasar Kerja, Lingkungan Keluarga Dan Fleksibilitas Kerja Terhadap Minat Menjadi Akuntan Publik (Studi Empiris Mahasiswa Akuntansi Perguruan Tinggi Negeri Di Kota Padang)
Authors: Elviadmi May Neni , Handayani Desi , Rissi Dita Maretha
Published: October 2024

This study aims to determine the effect of financial rewards, labor market considerations, family environment and work flexibility on interest in becoming a public accountant. This research is a quantitative research. The method of data collection was using a questionnaire instrument which was distributed online via google form . Distributed to accounting students of state universities in Padang City who have met the criteria. The sample used was 204 people using the proportional stratified random sampling method . Analysis of the data used is multiple linear regression analysis using SPSS version 25. Based on the results of data processing, it can be concluded that financial rewards, labor market considerations, family environment and work flexibility have a positive and significant effect on interest in becoming a public accountant.
Keywords: Interests, Public Accountants, Financial Awards, Labor Market Considerations, Family Environment and Work Flexibility
Pengaruh Perceived Usefulness, Ease of Use, Security dan Risk terhadap Penggunaan E-wallet pada Mahasiswa Politeknik Negeri Padang
Authors: Putri Aprilyani Wirheny , Andriani Wiwik , Surya Firman
Published: October 2024

This study was conducted to determine the effect of perceived usefulness, ease of use, security and risk on use behavior the e-wallet in Politeknik Negeri Padang students. This study uses a quantitative approach. The population of this study is Politeknik Negeri Padang students who use e-wallet. The sampling method in this study was non-probability sampling with accidental sampling technique so that a sample of 110 respondents was obtained. The data used is primary data obtained through the distribution of online questionnaires via google form. The hypothesis testing in this study used multiple linear regression analysis which was processed with the help of the IBM SPSS version 25 program. The results showed that the perceived usefulness and ease of use variables had a positive effect on use behavior the e-wallet, while the perceived security variable does not have a positive effect on use behavior the e-wallet, and the perceived risk variable does not negative effect on use behavior the e-wallet in Politeknik Negeri Padang students. In addition, simultaneously the variables of perceived usefulness, ease of use, security and risk effect on use behavior the e-wallet in Politeknik Negeri Padang students.
Pengaruh Literasi Keuangan, Gender Dan Gaya Hidup Terhadap Perilaku Pengelolaan Keuangan Mahasiswa
Authors: Septriani Yossi , Suzanna Lidya , Mustika Rasyidah
Published: October 2024

The purpose of this research is to find out empirically relationship between financial literacy, gender and lifestyle  with financial management behavior. This research was conducted by taking a sample of accounting students from Politeknik Negeri Padang in West Sumatera. The theory used in this research is Theory of Plan Behaviour theory. Using the Slovin formula and purposive sampling techniques, 90 students were selected as samples. The results of the study that financial literacy did not have a relationship with financial management behavior. Meanwhile, gender and lifestyle has  a relationship with financial management behavior. However, simultaneously the three variables, namely financial literacy, gender, and lifestyle have a relationship with financial management behavior.
Faktor-Faktor Yang Mempengaruhi Kepatuhan Wajib Pajak Kendaraan Bermotor Di Kota Payakumbuh
Authors: Febrianti Elina , Ferdawati Ferdawati , Sulastri Reni Endang , Haslina Welsi , Ramadhea Jr Syafira
Published: October 2024

Motor vehicle tax is part of the local tax that contributes greatly to regional income in the city of Payakumbuh. Taxpayer compliance in paying taxes will be able to increase tax revenues so that regional income for development also increases. This study aims to obtain empirical evidence regarding the elements that can affect the compliance of motor vehicle taxpayers in paying their obligations. The variables that are the focus of this study are the influence of taxpayer awareness, sanctions, service quality and tax socialization on motor vehicle taxpayer compliance in Payakumbuh. This study took the population of motorized vehicle taxpayers who were recorded in SAMSAT Payakumbuh city by determining the sample using simple random sampling method. Data were collected by distributing questionnaires and the data analysis technique used multiple linear regression analysis. From this study, it was found that three elements, namely taxpayer awareness, tax service quality and tax socialization have an influence on taxpayer compliance in paying motor vehicle taxes in Payakumbuh, but for tax sanctions have no effect on taxpayer compliance in paying vehicle taxes. motorized in the city of Payakumbuh.
Pengaruh Kecerdasan Emosional, Minat Belajar, Dan Perilaku Belajar Terhadap Tingkat Pemahaman Akuntansi Dasar (Studi Kasus Mahasiswa Akuntansi Politeknik Negeri Padang)
Authors: Sofyra Tesa , Sukartini Sukartini , Septriani Yossi
Published: October 2024

This study aims to determine the effect of emotional intelligence, interest in learning, and learning behavior on the level of understanding of basic accounting. This research is a quantitative research. The method of data collection is using a questionnaire instrument which is distributed online via google form. The population of this research is the Accounting students of the Padang State Polytechnic class of 2018, 2019, and 2020 for the Accounting DIV study program and the 2019 and 2020 batches for the Accounting DIII study program totaling 367 people. The research sample amounted to 159 people. Samples were taken using a selection method with certain criteria. Analysis of the data used is multiple linear regression analysis using SPSS version 23. Based on the results of data processing, it can be concluded that partially emotional intelligence has no significant effect on the level of understanding of basic accounting, interest in learning has a significant effect on the level of understanding of basic accounting and learning behavior has an effect significant to the level of understanding of basic accounting, while simultaneously emotional intelligence, interest in learning, and learning behavior affect the level of understanding of basic accounting.
Upaya Peningkatan Persepsi Kemudahan Pembelajaran Daring pada Guru melalui Schoology
Authors: Narimo Sabar , Mustofa Rochman Hadi , Wahyudi Tri Nur
Published: October 2024

This community service activity aims to increase the perception of the ease of online learning for teachers in SMK 5 Muhammadiyah Kepanjen. The learning management systems (LMS) application used is Schoology as a form of online learning. The activity was carried out virtually between instructors and teachers at SMK 5 Muhammadiyah Kepanjen to prevent the spread of Covid-19. After the training, the teacher was given a statement questionnaire that measured the perceived ease of use of Schoology in terms of 1.) appearance, 2.) attendance system, 3.) assignment & assessment, 4.) and ease of use. The results show that the teacher's perception of the four aspects agrees. In other words, teachers agree that Schoology is easy to use for online learning. Kegiatan pengabdian masyarakat ini bertujuan untuk meningkatkan persepsi kemudahan belajar daring bagi guru-guru di kalangan SMK 5 Muhammadiyah Kepanjen. Aplikasi learning management systems (LMS) yang digunakan adalah Schoology sebagai bentuk dalam pembelajaran daring. Kegiatan dilaksanakan secara virtual antara instruktur dengan guru-guru di SMK 5 Muhammadiyah Kepanjen sebagai bentuk pencegahan penyebaran Covid-19. Setelah pelatihan, guru diberikan kuesioner pernyataan yang mengukur persepsi kemudahan penggunaan Schoology dari segi 1.) tampilan, 2.) sistem presensi, 3.) penugasan & penilaian, 4.) serta kemudahan penggunaan. Hasilnya menunjukkan bahwa persepsi guru terhadap keempat aspek tersebut menyatakan setuju secara keseluruhan. Dengan kata lain, guru menyatakan setuju bahwa Schoology mudah digunakan untuk pembelajaran daring.
Pemberdayaan Komunitas Guru dalam Mensosialisasikan Berpikir Secara Komputasi Kepada Siswa Sekolah Dasar dan Menengah
Authors: Hartati Sulis Janu , Vitianingsih Anik Vega
Published: October 2024

ABSTRACTThe target for this community service activity is the Teacher Community, consisting of elementary school teachers, junior high school teachers, and high school teachers. The activity is sponsored by NBO Bebras Indonesia, as a partner that bears all costs of community service. The main problems of the target community are low knowledge of informatics and computational thinking, low high-order thinking skills, low knowledge of the challenges of freedom as an arena for competition in informatics and computational thinking. The method used to solve partner problems is online empowerment through webinars, workshops, group discussions in WhatsApp groups, and mentoring. The purpose of this community service is to cultivate computational thinking through the Indonesian Bebras Challenge Olympiad, with elementary, junior high, and high school students as well as vocational students. The results show that the success rate of getting the target teacher is 235%, the success of mobilizing elementary to high school students at the equivalent to participate in the free training reaches 7.4%. The number of participants who successfully took part in the Bebras Challenge was 3,246 students. The highest score was achieved by the SiKecil group as many as 87 students. Keywords: Online Empowerment,  The Teacher Community, Computational Thinking, Bebras Indonesia.  ABSTRAKMasyarakat sasaran pada kegiatan pengabdian kepada masyarakat ini adalah Komunitas Guru, terdiri dari Guru Sekolah Dasar sampai dengan Sekolah Menengah Atas dan sederajat. Kegiatan disponsori oleh NBO Bebras Indonesia, sebagai mitra yang menanggung seluruh biaya pengabdian kepada masyarakat. Masalah utama msyarakat sasaran adalah: rendahnya pengetahuan tentang informatika dan berpikir secara komputasi, rendahnya kemampuan berpikir tingkat tinggi, rendahnya pengetahuan tentang tantangan bebras sebagai ajang kompetisi informatika dan berpikir secara komputasi.  Metode yang digunakan untuk menyelesaikan masalah mitra adalah pemberdayaan secara daring melalui webinar, workshop, diskusi kelompok dalam grup WhatsApp, serta pendampingan. Tujuan kegiatan pengabdian kepada masyarakat adalah membudayakan berpikir komputasi melalu Olimpiade Tantangan Bebras Indonesia, dengan peserta siswa Sekolah Dasar, Menengah Pertama, serta Atas juga Kejuruan, dan sederajat. Hasil pemberdayaan menunjukan bahwa tingkat keberhasilan mendapatkan guru sasaran sebesar 235%, keberhasilan memobilisasi siswa SD sampai SMA sederajat mengikuti tangangan bebras mencapai 7.4%. Jumlah peserta yang berhasil mengikuti tantangan bebras sebanyak 3.246 siswa. Nilai tertinggi paling banyak dicapai oleh kelompok Sikecil sebanyak 87 siswa. Kata Kunci: Pemberdayaan Daring, Komunitas Guru, Berpikir Komputasi, Bebras Indonesia.
Pengembangan Usaha Kelompok Bina Usaha Ekonomi Keluarga Aisyiyah (BUEKA) PDA Sukoharjo Melalui Pemasaran Digital Berbasis Internet
Authors: Suwandi Joko , Jatmika Surya , Chamsudin Ahmad , Makhrus Faizal
Published: October 2024

The Covid-19 pandemic has been able to change consumer behavior in shopping. From those who have to go directly to traders to market stalls, shops or stalls, now with the help of sophisticated high-tech internet-based equipment, they can choose products through digital tracking facilities, transact and make payments through online applications and e-payments. This change was addressed by the UMS PKM team together with the Sukoharjo PDA Economic and Employment Council as partners to empower the businesses of Aisyiyah women assisted by BUEKA to change service strategies according to consumer demands. The programs carried out include; increasing human resources in carrying out marketing strategies for business products in the digital era, digitizing marketing and product placement on the Shopee and Facebook Marketplaces. The PKM program was successful; 1) Increase the insight of BUEKA fostered business actors about the demands of modern marketing and the interest in implementing them in their business development; 2) As many as 46% of BUEKA fostered businesses have been able to create digital advertisements and place their products on the Shopee marketplace and display them on Youtube; and 3) Increase sales volume by 20%.Pandemi Covid-19 telah mampu mengubah perilaku konsumen dalam berbelanja. Dari yang harus mendatangi pedagang langsung ke lapak pasar, toko atau warung, sekarang dengan bantuan kecanggihan peralatan berteknologi tinggi berbasis internet bisa memilih produk lewat fasilitas lacak digital, bertransaksi dan melakukan pembayaran melalui aplikasi online dan e-payment.  Perubahan ini disikapi oleh tim PKM UMS bersama Majelis Ekonomi dan Ketenagakerjaan PDA Sukoharjo sebagai mitra untuk memberdayakan usaha ibu-ibu Aisyiyah binaan BUEKA untuk merubah strategi layanan sesuai tuntutan konsumen. Program yang dilakukan meliputi; peningkatan SDM dalam melakukan strategi pemasaran produk usaha di era digital, digitalisasi pemasaran dan penempatan produk di Marketplace Shopee dan Facebook. Program PKM ini berhasil; 1) Meningkatkan wawasan pelaku usaha binaan BUEKA tentang tuntutan pemasaran modern dan minat untuk menerapkan dalam pengembangan usahanya; 2) Sebanyak 46% pelaku usaha binaan BUEKA telah mampu membuat iklan digital dan menempatkan produknya di marketplace Shopee dan menampilkan di Youtube; dan 3) Meningkatkan volume penjualan sebesar 20%.
Pelatihan Penggunaan Aplikasi M-Write sebagai Upaya Meningkatkan Kemampuan Menulis dan Literasi Digital Siswa
Authors: Sumarno Wahyu Kyestiati , Furqon Hendrik , Shodikin Ali , Solikha Nur Imro’atus , Pratama Novandi Kevin , Adha Didan Rizky
Published: October 2024

ABSTRACTWriting skills and digital literacy are still important skills needed today. However, often the lack of these two skills is still found. Therefore, the handling of the low level of these two skills needs to be addressed immediately. M-Write is a digital application that facilitates the writing process for beginners by involving students' metacognition skills and a process-genre-oriented writing approach with the help of problematized scaffolding that can be accessed via websites or smartphones. The purpose of this training activity for using the M-Write application is as an effort to improve students' writing skills and digital literacy at SMP Muhammadiyah 6 Pucuk. The methods used include discussion and equality of perceptions, preparation and reproduction of training modules, preparation of assessment instruments, training and assistance in the use of practice-based M-Write applications, and report preparation. This training was attended by 41 students in 7th and 8th grades. The results show that the use of the M-Write application provides a good change for students in improving their writing and digital literacy skills. The use of the M-Write application is expected to continue to be used by schools to support learning that applies writing learning, such as Indonesian and English lessons. Keywords: writing skills, digital literacy, M-Write, writing application ABSTRAKKemampuan menulis dan literasi digital masih menjadi kemampuan penting yang dibutuhkan saat ini. Namun seringkali rendahnya kedua kemampuan dan keterampilan ini masih banyak ditemukan. Oleh karena itu, penanganan akan rendahnya kedua kemampuan dan keterampilan ini perlu untuk segera ditangani. M-Write merupakan salah satu aplikasi digital yang memfasilitasi proses menulis bagi pemula dengan melibatkan kemampuan metakognisi siswa dan pendekatan process-genre-oriented writing berbantuan problematized scaffolding yang dapat diakses melalui website maupun smartphone. Tujuan kegiatan pelatihan penggunaan aplikasi M-Write ini adalah sebagai upaya meningkatkan kemampuan menulis dan literasi digital siswa di SMP Muhammadiyah 6 Pucuk. Metode yang digunakan meliputi diskusi dan penyamaan presepsi, penyusunan dan perbanyakan modul pelatihan, penyusunan instrumen penilaian, pelatihan dan pendampingan penggunaan aplikasi M-Write berbasis praktik, dan penyusunan laporan. Pelatihan ini diikuti oleh 41 siswa kelas 7 dan kelas 8. Hasil pelatihan ini menunjukkan bahwa penggunaan aplikasi M-Write memberikan perubahan yang  yang baik kepada siswa dalam meningkatkan kemampuan menulis dan literasi digital mereka. Penggunaan aplikasi M-Write ini diharapkan dapat dilanjutkan untuk digunakan oleh sekolah untuk menunjang pembelajaran-pembelajaran yang menerapkan pembelajaran menulis, seperti pelajaran bahasa Indonesia dan bahasa Inggris. Kata Kunci: kemampuan menulis, literasi digital, M-Write, aplikasi menulis
Aplikasi Virtual Chemistry Laboratory bagi Calon Guru Kimia di Jayapura
Authors: Amsad Lusia Narsia , Jukwari Jukwati
Published: October 2024

ABSTRACTThere is a pattern change that occurred in the world of education as a result of the development of Society 5.0 and the existence of the Covid-19 Pandemic caused changes in chemistry lessons provided by teachers. This makes chemistry teachers not only able to carry out learning offline but teachers must also be able to carry out online learning. Learning in the form of practicum which is often carried out offline also needs to be modified in its implementation so that it can be carried out online. To overcome the difficulties for prospective chemistry teachers to carry out online practicums, training is provided in using the Virtual Chemistry Laboratory application. The stages in this training consist of preparation, implementation and evaluation. The implementation of this training provides positive knowledge about the use of the Virtual Chemistry Laboratory application and a positive influence for prospective chemistry teachers to be able to carry out learning using practical methods more effectively for students.  ABSTRAKAdanya perubahan pola yang terjadi dalam dunia pendidikan sebagai dampak dari berkembangnya Society 5.0 dan adanya Pandemi Covid-19 menyebabkan terjadinya perubahan pada pembelajaran kimia yang diberikan oleh guru. Hal ini membuat guru kimia tidak hanya dapat melaksanakan pembelajaran secara offline saja namun guru juga harus dapat melaksanakan pembelajaran secara online. Pembelajaran dalam bentuk praktikum yang sering dilakukan secara offline juga perlu dimodifikasi dalam pelaksanaannya agar dapat dilaksanakan secara online. Untuk mengatasi kesulitan calon guru kimia dalam melaksanakan praktikum online, diberikan pelatihan penggunaan aplikasi Virtual Chemistry Laboratory. Tahapan dalam pelatihan ini terdiri dari persiapan, pelaksanaan dan evaluasi. Terselenggaranya pelatihan ini memberikan pengetahuan positif tentang penggunaan aplikasi Virtual Chemistry Laboratory dan memberikan pengaruh positif bagi calon guru kimia untuk dapat melaksanakan pembelajaran dengan metode praktik dengan lebih efektif bagi siswa.
Kazan’ Fragments Belonging to V. I. Grigorovich: On the Preservation of Early Slavic Manuscript Heritage
Authors:   HSE University (Russia), Lifshits Alexander
Published: October 2024

Several fragments of Slavic manuscripts discovered in the library of Kazan University invite us to reconsider the nature of the surviving monuments of Slavic writing. Brought in the 19th century from the Balkans, these codices and their parts were often perceived as relics rather than written sources. The tradition of collecting characteristic of Russia until the third quarter of the 19th century often led to the partial loss of ancient codices. At the same time, ancient manuscripts were better preserved in places of their origin simply because they had gone out of use. This happened primarily on the periphery of the Slavic world or due to the archaic nature of texts contained in the manuscripts.
In Search of an Ancient Russian Cell Prayers Liturgical Charter of the 12th Century
Authors:   Moscow Theological Academy, Yudin Dalmat
Published: October 2024

Earlier in the works of E. V. Barsov and M. N. Speransky, dedicated to the Yaroslavl Horologion (second half of the 13th century), it was suggested that this unique ancient Russian liturgical miscellany contains a rule of prayer that belongs to the heritage of St. Kirill of Turov (12th century). The basis for this hypothesis was the presence in the miscellany of a cycle of prayers by St. Kirill, as well as a mention of the “charter of unworthy Kirill”. This study presents arguments in favor of the fact that the phrase about the liturgical charter does not refer to the miscellany as a whole, but is associated with the charter of the cell rule of St. Kirill, the core of which is his cycle of prayers. Based on the surviving author's instructions for prayers, it turned out to be possible to give a partial description of his charter. Some texts of the charter are determined quite reliably (the commemoration and prayer “for all Christians”), and some are established tentatively.
E. Barsov’s Lamentations of the Northern Land: Research and Materials for the Dictionary
Authors:   Institute of Slavic Studies, Russian Academy of Sciences, Tolstaya Svetlana , Surikova Olesia ,   Vinogradov Russian Language Institute, Russian Academy of Sciences
Published: October 2024

The book is dedicated to the famous collection Lamentations of the Northern Land by Elpidifor Barsov, published in the 19th century and containing wedding, funeral and recruiting lamentations recorded in the Olonets Governorate. The first part of the book contains the researches on the poetics of lamentations, on their specific motifs, images and concepts (the bride's context, death, sorrow, war, categories of time and space, male and female, the world of material objects, etc.), on their communicative structure, rhythm and onomastics. The second part of the book is devoted to Barsov's collection as a linguistic source: it includes semantic reconstruction and etymology of certain lexemes, analysis of phonetic, word-formation and grammatical features of lamentations, of their specific composite units (binomials). The third part contains materials for the Dictionary of lamentations (letters A–D), a complete lexicon of lamentations (including the frequency data), a reverse index of word forms, a list of binomials, a bibliography of works devoted to the Barsov’s collection.
How do kinematic and visual cues influence cyclist overtaking? A comparison of test environments
Authors: Rasch Alexander , Thalya Prateek , Sandin Jesper , Dozza Marco
Published: October 2024

Artificial test environments have become indispensable for modeling human behavior in traffic because they provide more control of experimental factors and fewer ethical concerns than a real traffic environment. These advantages are particularly critical for research on interactions involving vulnerable road users such as cyclists and drivers of motorized vehicles. However, previous research comparing test environments has predominantly focused on car-to-car interaction scenarios. This study investigated a cyclist-overtaking scenario in three different environments: a driving simulator (SIM: N = 25), a test track (TT: N = 18), and a hybrid “driver-vehicle-in-the-loop” environment (DVIL: N = 33) in which the participants drove a real vehicle on a test track while wearing a virtual-reality headset, so they could only see the virtual environment. Overall, the results verified that the direction of the main factors affecting overtaking strategy and performance was similar across all environments. In presence of a close oncoming vehicle, drivers in all environments preferred the more cautious accelerative (waiting behind the cyclist) over flying (passing the cyclist while facing the oncoming vehicle) overtaking strategy, and this effect was strongest in SIM. Metrics related to safety margins to the cyclist followed a similar trend in all environments in the presence of oncoming traffic; however, the TT environment had the smallest overall safety margins, suggesting that virtual visual cues induce safer behavior. Because overtaking maneuvers depend on depth estimation, the visual resolution of the virtual environment may be more important than the environment itself in explaining the results.
Seafloor character of the Roman Rock area in False Bay, South Africa
Authors: Terhorst Andrew , Rogers John
Published: October 2024

Context: This study investigates the seafloor character of a 12 km2 area off Simon’s Town in False Bay, South Africa. Aims: The goal was to map the seafloor geology around Roman Rock Lighthouse, focusing on sedimentology. Methods: Side-scan sonar and single-beam echosounder were used, complemented by sediment sampling and diver observations for ground-truthing. Sediment samples were analysed for texture and composition. Key Results: Six patterns of reflectivity (acoustic facies) were identified, including granite outcrops, wave ripples, and patches of gravelly and quartzose sands. Sediment analysis showed a mix of calcareous and quartzose components, with calcareous material dominating the gravel fraction near granite outcrops. Conclusions: The Roman Rock seafloor reflects a complex depositional environment shaped by biogenic activity and wave-induced sediment transport. Implications: This research lays the groundwork for future geological studies in False Bay, particularly around wave-induced sediment dynamics.
Seismic Characterization of Carbonate Stringers using Machine Learning techniques: an example from the Western Flank of South Oman Salt Basin
Authors: Farfour Mohammed , Al Obaidani Hilal
Published: October 2024

Carbonate stringers are defined as a slab of carbonate bodies encased inside salt. In Oman, the intra-salt carbonate stringers are a very common target, especially in South Oman Salt Basin (SOSB). These stringers contain a large amount of hydrocarbon resources. In this study, the behavior of carbonate stringer bodies hosted in Ara salt structures from the SOSB is investigated. Both synthetic and real seismic data are use. A geological model is created from the structural interpretation of a newly acquired and processed seismic data from the area. The synthetic model is used to generate different seismic and elastic quantities such as P-wave, S-wave, density, synthetic gathers, and stack seismic data. Different attributes are computed from the synthetic gathers before inverting them to acoustic impedance, shear impedance, and density. In order to help us detect carbonate stringers and predict their distribution, Machine Learning, namely, Artificial Neural Network (ANN), is deployed to combine all the computed attributes into one probability cube. The cube highlights only stringers detected by the trained ANN. The ANN demonstrated a promising capability of detection of the targeted stringers. The above experiment is repeated on real prestack data after converting them to impedances using prestack seismic inversion. Likewise, the ANN was able to delineate the stringers and predict the distribution in the 3-D data. After several tests, a final 3-D distribution model of the stringers was obtained. The cube has allowed us to find new potential zones that might be good prospects in any future drilling in the area.
Trends in Views of Democracy and Society and Support for Political Violence in the USA, 2022-2024: Findings from a Nationally Representative Survey
Authors: Wintemute Garen J. , Crawford Andrew , Tomsich Elizabeth A. , Pear Veronica A.
Published: October 2024

Background: In 2022, a nationally representative longitudinal survey in the USA found concerningly high prevalences of support for and personal willingness to engage in political violence, but those prevalences decreased in 2023. This study examines changes in those prevalences from 2023 to 2024, an election year in the USA.Methods: Participants were members of Ipsos KnowledgePanel. Wave 3 of the survey was conducted May 23-June 14, 2024; invitations to participate were sent to all respondents to prior waves who remained in KnowledgePanel. Outcomes are expressed as weighted proportions. Year-to-year change is based on the means of aggregated individual change scores, which have a potential range from 0 (no change) to ±2. Results: The 2024 completion rates were 88.4% (8896 respondents/10,064 invitees) overall, 91.6% (8185 respondents/8932 invitees) for invitees in 2024 who had responded in 2023, and 62.8% (711 respondents/1132 invitees) for invitees in 2024 who had responded in 2022 but not in 2023. After weighting, 50.9% (95% confidence interval (CI) 49.5%, 52.3%) were female; weighted mean (SD) age was 48.5 (24.9) years. From 2023 to 2024, the prevalence of the view that violence was usually or always justified to advance at least 1 political objective did not change (2024: 26.2%, 95% CI 25.0%, 27.5%; 2023: 25.3%, 95% CI 24.1%, 26.5%). There were no changes from 2023 to 2024 in willingness to damage property, threaten a person, injure a person, or kill a person in an act of political violence, and no changes in expectations of firearm use in situations where respondents considered political violence justifiable. Changes on other measures were infrequent (17 of 58 comparisons in the main analysis) and small where they occurred (with 2 exceptions, change < 0.05). Conclusions: Contrary to expectation, support for and willingness to participate in political violence in this cohort showed little to no change from 2023 to 2024, an election year in the USA. These findings can help guide prevention efforts.
Northilization in Central Europe: Examining Czech Vikings
Authors: Maiello Giuseppe , Cirklová Jitka
Published: October 2024

This study introduces the term Northilization to refer to the utilization and commodification of Northern cultural and regional identity, impacting various sectors such as fashion, media, branding, and cultural tourism. The study examines the Czech Vikings, a unique community that embodies Northilization in Central Europe, focusing on their practices and broader implications for cultural preservation and commodification. Through theoretical frameworks and a case study based primarily on social media research, this study explored how Northern cultural elements are recontextualized in contemporary settings, emphasizing the balance between cultural appreciation and appropriation.
Winners’ Restraint or Affective Majoritarianism? Elections, Polarization and Political Support
Authors: Tomic Damjan , Ferrer Sergi , Gonzalez Enrique Prada , Hernández Enrique
Published: October 2024

Research on the impact of elections on attitudes toward democracy has focusedprimarily on satisfaction with democracy. Building on this, we analyze how win-ning and losing elections, along with affective polarization, shapes citizens’ supportfor norms of democratic restraint and consent. We propose that partisan animusweakens the “reservoir of goodwill” that helps citizens accept democratic norms ofrestraint and consent that may go against their self-interest. However, a compara-tive study of 36 elections and two quasi-experimental case studies show that win-ners and losers do not differ significantly in their support for these key democraticnorms. Even in highly polarized contexts, winners’ restraint and losers’ consentremain relatively robust. While satisfaction with democracy is shaped by winner-loser dynamics, especially when polarization is high, support for core democraticprinciples is not, despite increased partisan hostility. These findings have positiveimplications for our understanding of the role of citizens in democratic processes.
Narrative Engagement in Story Listening: The Challenge of Age and Vision Loss
Authors: Mathiesen Signe Lund , Grenier Amanda , Wittich Walter , Sukhai Mahadeo , Herrmann Bjorn
Published: October 2024

Narrative engagement offers substantial psychosocial benefits, including cognitive health, emotional and social well-being, and longevity. However, vision loss in older adults can pose challenges in accessing printed narratives. As individuals may shift from print to auditory narratives due to age-related vision loss, understanding how this transition affects narrative engagement becomes crucial. The current work provides a synthesis of the intersection of aging, vision loss, and narrative engagement, focusing on cognitive, emotional, and sensory changes. We discuss how age and vision loss may modify critical components of story engagement, potentially altering narrative consumption and experience. Our research highlights the need to adapt research methodologies and measurement scales to suit older adults and auditory narratives, ensuring they capture unique aspects of auditory engagement and account for sensory impairments. We propose novel directions for studying narrative engagement and offer insights for future research to provide inclusive and accessible narrative forms that support the cognitive and emotional well-being of older adults.
Mothers’ speech predicts children’s differences in cognition, literacy, and educational achievement across the school years
Authors: Brown Anna , Caspi Avshalom , Fisher Helen Louise , Moffitt Terrie , Wertz Jasmin , von Stumm Sophie
Published: October 2024

Children from well-resourced families achieve, on average, higher grades and gain more qualifications than those from under-resourced families. Mothers' speech is likely a key driver of the transmission of family background inequality in education. Yet, long-term associations between mothers' speech and children's education-related outcomes beyond the early years have not been studied previously. Here, we quantified differences in mothers' vocabulary sophistication, lexical diversity, and grammatical complexity from 10-minute-long naturalistic speech samples audio-recorded when children were age 5 and starting formal education. Children completed measures of cognition at age 5 and measures of literacy at ages 7 and 10 years; teachers rated their educational achievement at ages 7, 10, and 12 years. Data came from E-Risk, a UK cohort study that recruited families with twins born in 1994 and 1995 who represented the full range of Britain's socioeconomic conditions (analytic sample N = 894 mother-child trios). Mothers' vocabulary sophistication significantly predicted children's cognition, literacy, and educational achievement between the ages of 5 and 12 years, accounting for 2% to 5% of the variance. These estimates were reduced to 1% and 2% or became altogether non-significant after adjusting for mothers' educational attainment and household income. Our findings suggest that mothers' speech plays a small independent role in the long-term transmission of family background inequality in education.
The Talk of the Town—Multilayered Monolithic Zirconia
Authors: Maskey B
Published: October 2024

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Evaluation of marginal fit of conventional, milled, and direct metal laser sintered cobalt chromium crowns: A comparative study
Authors: Sharan J , Chauhan GK , Munireddy S , Srinivas S , Sinha P , Basnyat S KC , Sharan J
Published: October 2024

Introduction: A close marginal adaptation of a fixed partial denture is crucial for its long-term functionality without any adversity. Human errors and casting defects are common with conventional techniques. The latest techniques, direct metal laser sintering (DMLS), and computer-aided design and manufacturing (CAD/CAM) tend to overcome these errors.
Methods: 33 dies were fabricated from similar number of impressions of a tooth based on standardized measurement and were equally distributed in 3 groups (11 each). Crowns were fabricated using conventional, DMLS, and CAD/CAM methods using chrome-cobalt. All the fabricated crowns were cemented onto the die using resin cement and 50 N force, followed by leaving them for 12 hours at room temperature. Then, each crown was sectioned into two halves, and a stereomicroscope was used to evaluate the cement thickness at three different reference points.
Results: The marginal fit of conventionally fabricated crowns, DMLS, and CAD/CAM crowns were in the clinically acceptable range. Marginal discrepancy remained more in conventionally fabricated crowns than in CAD/CAM and DMLS crowns. However, the axial discrepancy in crowns fabricated by the conventional method was lesser than in CAD/CAM and DMLS fabricated crowns. The occlusal discrepancy in DMLS-fabricated crowns was more than that of the other two methods.
Conclusion: The DMLS group displayed better marginal accuracy with respect to the marginal reference point. On the other hand, the convention group exhibited superior adaptability when the buccal and occlusal reference points were considered. Similarly, statistically significant results were observed when the conventional group's 'margin reference point' was compared with the CAD/CAM or DMLS group. The margin reference point of the CAD/CAM group was comparable with DMLS cobalt-chromium crowns.
Prosthetic rehabilitation with immediate single complete denture for periodontally compromised maxillary teeth: A case report
Authors: Rai A , Subba A , Suwal P , Parajuli PK , Limbu IK , Basnet BB
Published: October 2024

The total loss of teeth due to aggressive periodontitis is very traumatic for patient and immediate rehabilitation of such cases becomes a necessity. It is a challenging situation for a prosthodontist to rehabilitate such patient in order to preserve their aesthetic, psychological and functional wellbeing. One of the affordable and accessible options for rehabilitation of such condition is conventional immediate complete denture. The immediate replacement of missing teeth without a period of complete edentulism while maintaining the original vertical dimension and centric relation is one of the major advantages of these modality. This case report explains the method of fabrication of a conventional immediate complete denture with satisfactory retention, stability, support and aesthetics.
Full Mouth Rehabilitation of the Maxilla and Mandible with Implant- Supported Prostheses: A Case Report
Authors: Shrestha S , Singh R , Prajapati R , Shrestha B
Published: October 2024

The placement of dental implants in severely atrophic arches is not a straight-forward procedure. In such situations, the All-on-four protocol provides a simple alternative. The placement of four implants— two straight and two tilted— in these clinical scenarios allows clinicians to place fixed provisional restorations that are immediately loaded, and the patient can function with. This approach results in more simplicity, less treatment time, less patient morbidity, and immediate function. The provisional restoration is replaced by the permanent restoration after the period of osseointegration. Furthermore, incorporating surgical guides in the treatment allows for precise and controlled placement of implants that is confirmed during the treatment planning stage.
Learning English in Multicultural Contexts: Experiences and Strategies of Secondary Level Students in Rural Nepal
Authors: Khanal Govinda Prasad
Published: October 2024

How an additional language can be learned effectively has become an issue of interest among scholars of second language acquisition research. This research intended to explore secondary-level students’ experiences and strategies for learning English in multicultural contexts of classrooms and communities. This is qualitative interpretive research based on a case study design, where five cases from different cultural groups were purposively selected from the students of Grade 11 studying at two different secondary schools in Kapilvastu. The information was collected through semi-structured interviews and classroom observation, which was thematically analysed to report the findings. The study findings revealed that students generated self-learning strategies to fit their situations which tended to be influenced by their socio-cultural and economic realities. Based on the research findings, it is suggested for the adoption of culturally informed pedagogy to value students’ socio-cultural realities including the local languages in practice which provide useful learning resources to enhance proficiency in English.