bluuebunny/crossref_metadata_2025 huggingface dataset:
Forecasting implied volatilities of currency options with machine learning techniques and econometrics models
Authors: Olsen Asbjørn , Djupås Gard , Lange Petter Eilif , Risstad Morten
Published: October 2023

Developing an effective modeling framework to minimize FX risk is of vital importance for hedgers and traders in FX markets. In this study, we compare the ability of Long short-term memory (LSTM) models to that of Random Forest and AR-GARCH-type models for forecasting EURUSD implied volatility across the volatility surface. As our literature study argues, there are only a few published papers on this subject. We find that the LSTM model is the best model for shorter option maturities, whilst the AR-GARCH model is superior when the maturities increase. However, imposing other specifications and residual distributions for the GARCH models, we find that the AR-GARCH framework outperforms the more advanced machine learning models for all options. We observe that the LSTM model is able to capture immense and immediate changes in implied volatility, which is important for hedging against significant shifts in FX rates.
JEL. G17, G13
Diagnosis and treatment of infective aneurysm of mesenteric artery due to infective endocarditis
Authors: Wu Shengjun , Miao Sihan , Li Lin
Published: October 2023

Background
The incidence of infected aneurysms is low. Risk factors include atherosclerosis, arterial damage as well as previous infection. The different types of infected aneurysms, infective endocarditis still accounts for a larger proportion. The diagnosis and treatment methods have not been standardized yet.
Case presentation:
A 25-year-old young man presented with a fever (up to 39.0°C). Even after three months, the fever persisted and included abdominal pain and diarrhea. CT angiography of the thoracoabdominal aorta suggested the formation of a pseudoaneurysm, potentially a branch of the superior mesenteric artery. Considering the patient's presence of distant infarction and the formation of infectious pseudoaneurysm, the patient underwent early surgery. The patients underwent aortic valve replacement and partial small bowel resection. The coagulation function was monitored in the outpatient clinic after the operation, and the patient returned to normal life during the postoperative follow-up.
Conclusions
In patients with a history of endocarditis and a chief complaint of abdominal pain and fever, embolism due to septic embolic drop should be included in the differential diagnosis. Before the onset of symptoms, patients should be treated prophylactically, preventing surgical treatments such as bowel resection.
Assessment of COVID-19 Vaccination Awareness, Attitudes, Practices, and Influential Factors in the Chittagong District of Bangladesh
Authors: Akter Sahin , Murithi Rachael Gakii
Published: October 2023

Background: Bangladesh has not previously experienced epidemics such as SARS or MERS, and it is clear that its public healthcare systems are not readily prepared for COVID-19 vaccine uptake.
Objective: The aim of this research was to evaluate the level of knowledge, attitudes, and practices concerning COVID-19 vaccination and their determinants in Chittagong District, Bangladesh.
Methods: This descriptive cross-sectional study of 2,882 men and women was conducted in Chittagong, Bangladesh, from October 2021 to April 2022.
Results: A total of 850 men and women’s information was obtained, of which Group A = 205 (24.12%) for men and women who had been vaccinated, and Group B = 645 (75.88%) for men and women who had not been vaccinated. There were group/independent variables that entered the equation for subgroup analysis. Sensitivity analysis showed that the majority of the men and women that had been vaccinated had a good level of knowledge, attitudes, and practices regarding COVID-19 vaccination with (OR=0.166, 95% CI: 0. 113~0.245) and (OR=0.191, 95% CI: 0. 113~0.245), respectively. In addition, most of the men and women that were unvaccinated had poor/bad level of knowledge, attitudes, and practices regarding COVID-19 vaccination with (OR=0.228, 95% CI: 0.154~0.336) and (OR=0.239, 95% CI: 0.154~0.336), respectively. Most of the participants were aged between 40-49 years, were Muslims, had secondary school level of education, and were employed.
Conclusion: The results suggest that the epidemic has significantly increased the level of knowledge, attitudes, and practices concerning COVID-19 vaccination.
Digitalisierung als Pharmakon
Authors: Weber-Stein Florian , Heidenreich Felix
Published: October 2023

Das Konzept des Pharmakons fungiert bei Bernard Stiegler als Klammerbegriff, der verschiedene Aspekte seiner technik- und sozialphilosophischen Überlegungen zusammenhält. Spezifische explanatorische Kraft entfaltet das Konzept bei einer Analyse der (positiven wie negativen) Auswirkungen der digitalen Transformation. Im Folgenden wird der Versuch unternommen, eine Positionsbestimmung von Medienbildung in der digitalen Konstellation auf Grundlage einer solchen „pharmakologischen“ Perspektive vorzunehmen.
Politische Medienbildung und Netzpolitik
Authors: Dander Valentin
Published: October 2023

Der vorliegende Beitrag befasst sich mit der Schnittmenge von Politischer Bildung und Medienbildung und argumentiert die spezifische Relevanz von Netzpolitiken als deren Kern. Dieser Versuch wird als Essay unternommen und nimmt seinen Ausgang in der jüngeren Geschichte der Mikroblogging-Plattformen Twitter und Mastodon. Daran anschließend wird Baackes Begriff „Diskurs der Informationsgesellschaft“ auf Netzpolitik|en bezogen, insofern damit die Aushandlung und demokratische Gestaltung von Bedingungen (digitaler) Öffentlichkeiten verstanden werden können. Abschließend werden (ethische und politische) Perspektiven einer (netz-)politischen Medienbildung skizziert, welche sich der Ermöglichung demokratischer, gleichheitlicher und pluraler (Online-)Öffentlichkeiten verpflichtet.
Hematological Evaluation of Three Common Teleosts in Relation to The Environmental Changes from Trang Province, Thailand
Authors: Archig Jeamah  , Sinlapachai Senarat  , Suparat Kongoh  , Chanyut Sudtongkong  , Porntep Wirachwong  , Natthawut Charoenphon  , Nontawat Kawjaeng  , Pahol Kosiyachinda  , Anan Kenthao  , Piyakorn Boonyoung
Published: October 2023

Hematological evaluation of fish is essential to the assessment of their physiological status. This study describes the morphometric analysis and comparison of blood cell characteristics in Zanarchopterus sp., Gerres filamentosus Cuvier, 1829 and Leiognathus decorus (De Vis, 1884). The species were collected at two locations off the coast of Trang Province, Thailand. A comparative hematological evaluation was made to assess the effects of environmental conditions on the blood of the fish. Ten individuals of each species were collected from a seagrass bed at Libong Island, where human activities are increasing, and from a secluded sandy beach. Their blood samples were analysed using the blood smear technique. Erythrocytes of all the studied fishes were either elliptical or oval. The morphometric data from both locations showed that erythrocytes were of similar size, except for those of Zanarchopterus sp. Fish from both stations showed several types of leukocytes, including neutrophils and lymphocytes.The highest proportion of leukocytes was made up of lymphocytes, followed by neutrophils. However, monocytes were only observed in fish from Libong Island and the erythrocytic nuclei of fish collected from Libong Island were both reniform and lobate. Our results show the potential of hematological evaluation as an early warning signal of environmental impacts on aquatic animals. The determination of baseline parameters could provide a tool for the monitoring of environmental quality.
Implementasi Algoritma Fuzzy C-Means dalam Mengelompokkan Produktivitas Nauplius Vanammei di BBPBAP Jepara
Authors: Widiastuti Nur Aeni , Kusumodestoni Raden Hadapiningradja , Wahono Buang Budi , Chumaisaroh Diah Ayu
Published: October 2023

Balai Besar Perikanan Budidaya Air Payau often experiences changes in the number of vanammei shrimp production that is uncertain every day. This resulted in the scarcity of vanammei shrimp larvae seeds, unmet market demand and high selling prices. So that the BBPBAP experienced problems in monitoring the quality of the production of vanammei shrimp larvae. To overcome these problems, data mining is used as an alternative solution. The research method used is the Fuzzy C-Means algorithm. With the research stages starting from data collection, pre-processing data to clean data or attributes that are not suitable, clustering using the Fuzzy C-Means algorithm, testing using the MATLAB tool, and evaluating validation using the Davies Bouldin Index (DBI). Based on the results of the clustering that has been carried out from a total of 894 data, which are included in the good cluster, 569 data with the unfavorable category is 325. The results of the evaluation and validation obtained a value of 0.32 with the resulting cluster quality is optimum.
O papel das decisões judiciais na teoria do estado pós democrático de direito e o fenômeno da judicialização
Authors: Saldanha Rodrigo Róger , Oliveira José Sebastião de
Published: October 2023

Este trabalho trata sobre o fenômeno da judicialização no Estado Pós-democrático e seus reflexos nos limites estabelecidos através de direitos, trazendo uma reflexão sobre a estrutura de justificação das decisões judiciais e as fragilidades do estado. Neste sentido, questiona-se as atribuições dos poderes e sua efetividade podem proporcionar que outro poder tome as decisões em favor do Estado, e quais as estruturas condicionantes para esse fenômeno? A questão traz a problemático gênero, que a partir dela surgem diversos outros pontos que destacam a relevância da pesquisa. Dentre as justificações da pesquisa, surge a teoria do Estado pós-democrático de Direito, as fragilidades dessa desconstrução para justificar algumas das decisões do STF. Assim, abordou-se a judicialização dos direitos, as decisões judiciais contramajoritárias, representativas e iluministas e os limites das decisões no Estado pós-democrático de Direito. Utilizou-se do método hipotético dedutivo, pesquisa bibliográfica, em revista e periódicos especializados e demais referências, além de uma análise comparativa das teorias de Luís Roberto Barroso e Rubens Casara, utilizando-se esses dois marcos teóricos para a análise. Verifica-se nos resultados alcançados as influências no poder judiciário e a quebra dos limites em favor do projeto neoliberal que representa um retrocesso do Estado democrático e de Direito.
Podemos falar em “Crise da democracia brasileira”? Das possíveis causas e propostas para o fortalecimento democrático
Authors: Möller Gabriela Samrsla , Magnus de Marco Cristhian
Published: October 2023

O tema do presente artigo é a democracia brasileira e os problemas que vêm enfrentando no cenário político atual sob os auspícios de uma “crise da democracia liberal”. O trabalho objetiva aprofundar o panorama atual da democracia brasileira, o que será feito por pesquisa bibliográfica e documental. Propõe-se alguns questionamentos: Quão grave e o que significa viver uma crise democrática? Quais as razões? Quais possíveis soluções para a reversão do quadro? Quais os principais inimigos da democracia brasileira na atualidade? Concluiu-se, primeiro, que a crise da democracia é uma crise que pode ser associada a um movimento de autocratização e subversão sub-reptícia da democracia, praticado notadamente por governos populistas, que, em um cenário de insucesso econômico, corrupção e desconfiança generalizada, ganham apoio e força. Em segundo, o ambiente institucional vivenciado ainda aspira valores democráticos, mas há uma forte tendência de que isso seja afetado negativamente no futuro.
Niobium Oxide Photocatalytically Oxidizes Ammonia in Water at Ambient Conditions
Authors: Elias Welman , Clark Chelsea , Heck Kimberly , Arredondo Jacob , Wang Bo , Toro Andras , Kürti László , Wong Michael
Published: October 2023

Ammonia contamination in water is a significant environmental issue since it is toxic and leads to eutrophication. Photocatalysis has been investigated as a strategy for ammonia degradation but can potentially form toxic nitrite (NO2 – ) and nitrate (NO3 – ) byproducts. This work reports on the ability of niobium oxide (Nb2O5) to photocatalytically oxidize aqueous-phase ammonia (NH3). Whereas as-synthesized Nb2O5 showed little catalytic activity (< 1% NH3 conversion after 6 h of UV-C irradiation, at room temperature and atmospheric pressure, and under O2 headspace), Nb2O5 treated in basic solution (OH-Nb2O5) was able to photocatalytically degrade NH3 at ca. 9% conversion after six hours, with ca. 70% selectivity to the desired N2, with a first-order rate constant of ca. 12 times higher than the as synthesize catalyst (1.6 × 10–3 min–1 vs. 2.0 × 10–2 min–1). Raman spectroscopic analysis indicated the presence of terminal Nb=O species after base treatment of Nb2O5, implicating them as catalytically active sites. These results underscore how a simple structural modification can significantly affect photocatalytic activity for aqueous ammonia oxidation.
Plano Nacional de Educação (2014-2024) e o seu acompanhamento pelo Tribunal de Contas Da União
Authors: Castro Alda Maria Duarte Araújo , Cabral Neto Antônio , Paz Suelaynne Lima da
Published: October 2023

A fiscalização dos recursos públicos tem se constituído em um dos eixos da política educacional brasileira. Esse entendimento vem norteando as ações do Tribunal de Contas da União (TCU) em relação ao acompanhamento do Plano de Nacional de Educação PNE, 2014-2024) [PNE]. Este artigo objetiva abordar essa temática e se estrutura em três seções: a primeira discute a função do TCU como órgão de controle externo no acompanhamento do PNE; a segunda coloca em destaque a metodologia utilizada para acompanhar o PNE; a terceira apresenta resultados do 4° Relatório de Acompanhamento do PNE, produzido no âmbito do TCU. Utilizou-se como procedimento de pesquisa a análise documental e consulta à base de dados do TCU. A conclusão traz a lume a importância do monitoramento e da avaliação do PNE por órgãos de controle externo para os formuladores de políticas públicas como o TCU, tendo em vista a necessidade da sociedade acompanhar as ações desenvolvidas e os resultados alcançados pelo mencionado plano.
Lasers in Dentistry
Authors: Kumar Gyanendra , Kalra Namita , Sabherwal Puja
Published: October 2023

Lasers in dentistry is a relatively new concept with unique advantages.
Lasers are helpful in the treatment of hard and soft tissue of the oral cavity. The laser
light is created by an external light source reflected by mirrors. The mirrors are placed
around the active medium. The photons of light that reach the active medium activate
more photons exponentially. This results in a large amount of laser energy that is
highly focused and directional. This laser energy may be useful to cut or ablate. The
mechanism is that this laser energy is absorbed by the tissue according to the
penetration depth. A few real-life pictures are included at the end of the chapter for
learning experience of the student. These are pre- and post-operative pictures of five
interesting cases.
Program evaluation and review technique – Data envelopment analysis in benchmarking sustainable supply chain management of the potato chips industry
Authors: Akhbar Nugraha Billy , Hidayat Arif , Agustin Prima Dania Wike , Hatanaka Katsumori , Ramadhona Saville
Published: October 2023

Supply chain benchmarking of agroindustry can be done by emphasizing the perspective of sustainability. This paper aimed to analyze the efficiency of Sustainable Supply Chain Management (SSCM) in Micro, Small, and Medium Enterprises (MSMEs) and provided a prospective benchmark with the potato chips industry as a study case. Program Evaluation and Review Technique (PERT) estimated future input and output values to obtain prospective benchmarks and be added to the DEA formula later. Analytical Hierarchy Process (AHP) and Data Envelopment Analysis (DEA) methods were used to measure SSCM performance. The results showed that 17 of 20 Decision-Making Units (DMUs) were efficient (score 1). The other 3 DMUs were classified and got an efficiency score of 0.965, 0.955, and 0.995. In future estimates calculation, the efficiency score of one of the inefficient DMUs has changed to 1, while the other two got the scores of 0.996 and 0.980. The limitation of this research mainly comes from the scope of assessment, which is limited to the supply chain’s downstream sector and assesses only a limited number of MSMEs in a particular region. SSCM efficiency measurement variables were adjusted to be assessed and applied to MSMEs. PERT was also beneficial to gain future estimates of the assessment scope.
The effect of formulation with ginger (Zingiber officinale var. Roscoe) and different brewing techniques on physicochemical and organoleptic characteristics of cascara tea
Authors: Bekti Sunarharum Wenny , Khorirodatul Djannah Ajeng , Ekaning Asih Ngesti
Published: October 2023

The utilization of coffee cherry pulp, one of coffee processing waste, into tea (or known as cascara tea) is still limited regardless of its potential. Cascara tea flavor could be improved, such as by the addition of spices. Besides the addition of spices, the brewing techniques may also contribute to the properties of brewed cascara tea and consumer acceptance This study aimed to determine the effect of formulation (the ratio between cascara and ginger) and the different brewing techniques on the physicochemical and organoleptic characteristics of cascara tea. The best treatment was also determined. This study was conducted in Nested design with 2 factors i.e. brewing techniques (decoction and infusion) and ratio of cascara and ginger (9:1; 7:3; 5:5). Data analysis was performed using Minitab 17 and the best treatment was chosen by Multiple Attribute Zeleny method. The results showed that the ratio between cascara and ginger, as well as brewing techniques had a significant effect (α = 0.05) on total phenolic content, caffeine content, pH, color (L*, a* and b* value), and organoleptic parameter (except for taste, aftertaste, and overall). The best treatment was obtained from cascara tea with ratio of cascara and ginger =7: 3, brewed using the decoction technique. It offered total phenolic content of 27.73 mg GAE/g; caffeine content of 1.93 mg/g; pH of 6.1; Lightness (L*) 40.1; redness (a) 12.4; and yellowness (b*) 25.6.
DIBIUS: Aplikasi diagnosa Diabetes Mellitus berbasis adaptive neuro-fuzzy inference system
Authors: Isnani Isnani , Janah Mifta Arunahul , Astuti Fani
Published: October 2023

Diabetes Mellitus merupakan salah satu jenis penyakit keturunan yang dapat menyebabkan kematian. Jumlah penderita Diabetes Mellitus tersebut meningkat dari tahun ke tahun. Hal ini dikarenakan keterlambatan diagnosis penyakit dan juga gaya hidup yang tidak sehat. Penderita penyakit tersebut biasanya tidak menyadari sejak dini jika menderita penyakit Diabetes Mellitus. Untuk mengatasi hal tersebut maka dibuat sistem untuk identifikasi penyakit Diabetes Mellitus menggunakan penerapan dari matematika komputasi. Penggunaan matematika yang semakin meningkat dalam kehidupan manusia pada era revolusi industri 4.0 ini sangat mutlak. Banyak masalah yang dapat dimodelkan secara matematika dan disimulasikan dengan bantuan komputer untuk menyelesaikan masalah tersebut, khususnya dalam mendiagnosa Diabetes Melitus. Penelitian ini mengajak mahasiswa cerdas bermatematika dalam era revolusi industri 4.0 untuk membentuk suatu aplikasi DIBIUS yang merupakan penerapan dari metode ANFIS. Proses yang dilakukan pada penelitian ini adalah menentukan 15 variabel input dari gejala-gejala yang ada. Kemudian data diolah menggunakan pemrograman Visual Basic 6.0. Hasil dari penelitian ini adalah hasil diagnosis yaitu tidak terdiagnosis dan terdiagnosis. Oleh karena itu, diharapkan aplikasi DIBIUS ini dapat dijadikan pendiagnosis pertama bagi orang awam sebelum melakukan penanganan lebih lanjut.
Masalah Transshipment untuk penentuan rute distribusi BBM di Kabupaten Klaten
Authors: Fadhlurrahman Muhammad Ghani , Binatari Nikenasih
Published: October 2023

Pertamina Terminal BBM Boyolali MOR IV merupakan salah satu unit kegiatan pemasaran BBM di Jawa Tengah dan Jawa Timur yang bertugas untuk mendistribusikan produk BBM yang dihasilkan ke SPBU tujuan. Hal terpenting dalam kegiatan pendistribusian BBM adalah ketepatan waktu distribusi dan biaya distribusi yang minimum. Faktor penentu dalam mendapatkan waktu dan biaya yang optimal, salah satunya dengan pemilihan atau penentuan rute distribusi yang tepat atau dengan biaya distribusi yang minimum. Pertamina perlu menentukan rute distribusi BBM yang tepat untuk meningkatkan pelayanan yang lebih berkualitas kepada konsumen. Penelitian ini membahas pendistribusian BBM dari depot ke SPBU di Kabupaten Klaten khusus permintaan BBM sebesar 16 kl. Tahapan penelitian ini diawali dengan membuat formulasi model masalah transshipment menggunakan metode masalah penugasan sebagai penyelesaiannya. Selanjutnya, formulasi model tersebut digunakan untuk menentukan distribusi BBM di Kabupaten Klaten dengan tiga kriteria yaitu rute dengan mobil tangki 16 kl, mobil tangki 32 kl, dan campuran mobil tangki 16 kl dan 32 kl. Untuk memudahkan perhitungan, digunakan Excel Solver dan LINGO sehingga solusi dapat ditentukan lebih cepat. Melalui tiga kriteria tersebut, akan dilihat rute dengan biaya distribusi yang minimum, baik dari Excel Solver maupun LINGO. Hasil penelitian pada masalah transshipment untuk penentuan rute distribusi BBM di Kabupaten Klaten yang diperoleh sebagai solusi adalah Rp178.759 dengan 3 unit mobil tangki 32 kl. Sedangkan untuk mobil tangki 16 kl yaitu sebanyak 6 unit , membutuhkan biaya sebesar Rp304.392. Untuk mobil tangki 16 kl dan 32 kl, membutuhkan biaya sebesar Rp249.369 dan Rp206.542.
Analisis timeline divisi acara Lomba dan Seminar Matematika (LSM) XXVII menggunakan Critical Path Method
Authors: Khasanah Nisa Uswatun , Aini Dian Qurotul , Setyowisnu Glagah Eskacakra , Rifqy Salsabily
Published: October 2023

LSM merupakan program kerja tahunan dari Himpunan Mahasiswa Jurusan Pendidikan Matematika Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Yogyakarta (HIMATIKA FMIPA UNY) yang sudah diadakan selama 26 tahun. Pada tahun 2019, LSM akan diadakan untuk yang ke-27 kalinya. Berbagai persiapan dilakukan oleh panitia yang terbagi menjadi 12 divisi yaitu panitia inti, acara lomba, acara seminar, kesekretariatan lomba, kesekretariatan seminar, hubungan masyarakat, sponsorship, operasional, konsumsi, fasilitas, publikasi, dekorasi, dan dokumentasi , serta koordinator wilayah. Semua divisi tersebut memiliki tugas yang berbeda antara satu dan yang lainnya, begitu pula dengan waktu pelaksanaan tugasnya. Divisi acara lomba dan acara seminar menjadi pusat dari serangkaian kegiatan LSM dan pastinya diperlukan suatu perencanaan dan pengendalian kegiatan agar masing-masing pelaksanaannya dapat berjalan dengan efektif dan dalam rentang waktu yang optimal. Dengan demikian, penelitian ini bertujuan untuk menganalisa perencanaan dan pengendalian garis waktu (timeline) kegiatan yang harus dilakukan oleh kedua divisi acara dalam serangkaian kegiatan persiapan LSM XXVII menggunakan Critical Path Method (CPM) dalam jangka waktu yang optimal, sehingga LSM XXVII dapat terlaksana sesuai rencana.
Desain modul dengan pendekatan pendidikan matematika realistik berbasis kemampuan pemahaman matematis
Authors: Inayah Inayah , Rizqi Muhammad
Published: October 2023

Penelitian ini bertujuan menghasilkan modul dengan pendekatan Pendidikan Matematika Realistik (PMR) yang telah didesain valid dan layak digunakan pada pembelajaran. Metode desain yang digunakan adalah Didactical Design Research (DDR), melalui tiga tahap yaitu Tahap 1: Analisis Situasi Didaktis Sebelum Pembelajaran, Tahap 2: Analisis Metapedadidaktis dan Tahap 3: Analisis Retrospektif. Subjek penelitiannya yaitu siswa kelas VII di MTS Islamic Center Cirebon. Adapun teknik pengumpulan data yang digunakan adalah Validasi Modul dan Observasi serta teknik pengolahan datanya yaitu hasil validasi para ahli. Hasil penelitian yang diperoleh yaitu validator 1 yaitu 93% dengan kriteria Valid, Validator 2 yaitu 71% dengan kriteria cukup valid dan Validator 3 yaitu 91% dengan kriteria Valid sedangkan hasil validasi para ahli keseluruhan yaitu 87%. Sehingga modul dapat digunakan selama proses pembelajaran berlangsung.
Pengembangan media pembelajaran berbantuan software lectora inspire pada materi permutasi dan kombinasi
Authors: P Reza Rizaldy , Hobri Hobri , Dafik Dafik , Fatahillah Arif , Yudianto Erfan
Published: October 2023

Kecanggihan teknologi dan informasi perlu dikembangkan dalam pendidikan. Pemanfaatan perkembangan teknologi diharapkan mampu mendorong kemajuan ilmu pengetahuan dalam dunia pendidikan, termasuk matematika. Lectora inspire dikenal sebagai pembuat media pembelajaran. Lectora sebagai media pembelajaran interaktif di dalamnya memuat kategori tutorial, drill and practice, dan simulasi.  Lectora menyampaikan informasi atau pesan berupa suatu konsep yang disajikan di layar komputer dengan menggunakan teks, bagan, dan atau grafik. Model yang digunakan adalah model ADDIE yang merupakang singkatan dari Analysis, Design, Development, Implementation and Evaluation. Uji kefektifan diperoleh dari tes hasil belajar peserta didik setelah menggunakan media, dan uji kepraktisan media berasal dari angket respon peserta didik tentang media yang digunakan. Pada tahap evaluasi ini dari data yang didapatkan disekolah dan validasi perangkat dilakukan analisis kriteria kevalidan, kepraktisan, keefektifitasannya. Hasil validasi buku nilai rata-rata keseluruhan yaitu 4,59 yang termasuk dalam kategori sangat baik. Hasil nilai rata-rata keseluruhan kategori efektif dalam angket respon pengguna yaitu 3,9 dan secara persentase sebesar 79,6 %. Hasil penelitian kategori praktis menunjukan 24 dari 30 siswa tuntas atau dalam persentase sebesar 80% dari siswa telah tuntas materi permutasi dan kombinasi sehingga dari presentasi itu dapat dikategorikan sangat baik dan dikatakan efektif.
Pemanfaatan media pembelajaran berbasis augmented reality (AR) pada penalaran spasial siswa
Authors: Pangestu Aji , Susanti Eka , Setyaningrum Wahyu
Published: October 2023

Penelitian ini bertujuan untuk mengetahui pemanfaatan media pembelajaran geometri ruang berbasis augmented reality yang berorientasi pada penalaran spasial siswa. Metode yang digunakan dalam penelitian ini adalah studi literatur, yaitu dengan mengkaji penelitian-penelitian sebelumnya yang relevan dan menyimpulkan berdasarkan hasil yang diperoleh. Hasil dari penelitian ini adalah media pembelajaran berbasis augmented reality yang berorientasi pada penalaran spasial dapat dimanfaatkan dalam pembelajaran geometri ruang di SMA.
Peramalan Ketersediaan Jumlah Produksi Komoditas Kopi Nasional Terhadap Permintaan Ekspor Tahun 2019-2023
Authors: Azizi Ali , Setyowisnu Glagah Eskacakra
Published: October 2023

Pada tulisan ini akan dibahas korelasi antara produksi kopi nasional berturut-turut dengan jumlah pengiriman kopi ke negara ekspor utama dan harga ekspornya dalam mata uang dolar AS. Kemudian, akan disajikan peramalan ketersediaan jumlah produksi kopi nasional terhadap pengiriman ke negara ekspor, yang menyatakan bahwa prediksi jumlah produksi kopi tahun 2019-2023 masih cukup untuk memenuhi prediksi permintaan pengiriman ke negara ekspor
KAJIAN METODE ROBUST KRIGING DENGAN SEMIVAROGRAM ANISOTROPIK 3 DIMENSI (3D)
Authors: Purnamasari Devi Eka
Published: October 2023

Metode Kriging merupakan salah satu metode geostatistik yang menggunakan nilai spasial pada lokasi yang diamati dan variogram yang digunakan untuk memprediksi nilai pada suatu lokasi yang belum. Kriging sebagai interpolasi spasial optimum yang menghasilkan nilai prediksi yang kurang presisif apabila nilai spasial tersebut terdapat pencilan atau nilai yang tidak konsisten dari data yang diamati. Data spasial yang terdapat pencilan agar dapat diprediksi maka menggunakan metode Robust Kriging. Robust Kriging merupakan perkembangan dari Ordinary Kriging yang mengubah bobot semivariogram dari semivariogram klasik menjadi semivariogram yang robust. Dalam perhitungan semivariogram anisotropik diukur dengan 4 sudut yaitu 0°,45°,90° dan 135° sehingga dihitung dalam volume elipsoida. Parameter yang diperlukan yaitu: tiga range (a_x,a_y,a_z) dan dua sudut rotasi (α,β). Tujuan penelitian ini melakukan kajian metode Robust Kriging dengan semivariogram anisotropik tiga dimensi (3D). Pada penelitian ini disimpulkan bahwa data tiga Dimensi dapat dihitung menggunakan metode Robust Kriging dengan semivariogram anisotropik 3 dimensi (3D).
Perbedaan Profil Pemecahan Masalah Matematika Peserta Didik Berdasarkan Jenis Kelamin
Authors: Pangestu Aji , Retnawati Heri , Setyowisnu Glagah Eskacakra
Published: October 2023

Abstrak—Perbedaan jenis kelamin dapat mempengaruhi perbedaan psikologis dalam belajar, termasuk dalam proses belajar matematika. Melihat hal ini, peneliti melakukan penelitian dengan tujuan untuk mengetahui perbedaan profil pemecahan masalah antara peserta didik laki-laki dengan peserta didik perempuan. Peneliti memilih duasubjek yaitu MH (laki-laki) dan KR (perempuan) dengan memberikan permasalahan matematika. Hasilnya adalah terdapat perbedaan profil pemecahan masalah matematika antara peserta didik laki-laki dengan peserta didik perempuan. Perbedaan tersebut tampak pada apa yang mereka pikirkan serta lakukan dalam memecahkan permasalahan matematika. Urutan itu berdasarkan tahap-tahap Polya.

Kata kunci: Pemecahan masalah, jenis kelamin, matematika
Studi Tentang Kreativitas Siswa Cerdas Istimewa (CI) di SMAN 5 Denpasar
Authors: Nandini Ni Kadek Swari , Hidayati Kana
Published: October 2023

Penelitian ini bertujuan untuk mendeskripsikan tingkat kreativitas siswa cerdas istimewa di SMAN 5 Denpasar. Penelitian ini merupakan penelitian deskriptif kuantitatif dengan design cross-sectional. Populasi dalam penelitian ini adalah seluruh siswa cerdas istimewa di SMA Negeri 5 Denpasar tahun ajaran 2020/2021. Sampel diambil secara acak menggunakan simple random sampling dari populasi siswa cerdas istimewa di kelas X SMAN 5 Denpasar. Penelitian ini dilakukan selama periode Januari-Juni 2021. Data dianalisis secara deskriptif dengan bantuan aplikasi SPSS versi 20 dan disajikan dalam bentuk tabel dan narasi. Hasil penelitian ini menemukan bahwa tingkat kreativitas pada siswa cerdas istimewa di SMA 5 Denpasar mayoritas pada tingkatan sedang. Lebih lanjut, ditinjau dari keempat aspek kreativitas, pada aspek fluency dan fleksibilitas mayoritas berada pada tingkat tinggi, sedangkan pada aspek originalitas mayoritas pada tingkat rendah, dan pada aspek elaborasi pada tingkat sedang.
Analisis Kesulitan Siswa Menyelesaikan Soal Cerita Materi Perbandingan Pada Saat PTMT
Authors: Indriawati Mei
Published: October 2023

Salah satu kompetensi dasar yang harus dikuasai siswa adalah siswa dapat menyelesaikan soal cerita tentang perbandingan. Namun, tidak semua siswa lancar menyelesaikan permasalahan ini, karena mengalami kesulitan dalam mengerjakan soal. Selain itu, Pembelajaran tatap muka terbatas (PTMT) membuat waktu pembelajaran disekolah berkurang, sehingga siswa dituntut lebih banyak belajar mandiri. Penelitian ini bertujuan untuk mendeskripsikan kesulitan siswa dalam menyelesaikan soal cerita terkait perbandingan pada saat PTMT. Penelitian ini merupakan penelitian kualitatatif yang berjenis studi kasus. Partisipan dalam penelitian ini adalah siswa kelas VII SMP N 1 Galur, Kulon Progo, D.I. Yogyakarta. Data dikumpulkan menggunakan tes, yang terdiri dari 5 soal uraian. kepada 24 siswa dan wawancara. Selanjutnya jawaban dari siswa tersebut dikelompokkan berdasarkan benar atau salah berdasarkan langkah-langkah Polya. Setelah itu dipilih 4 siswa dengan kemapuan rendah, sedang,dan tinggi. Analisis data dilakukan dengan teknik Milles & Huberman dengan langkah Data Reduction (reduksi data), Data Display (penyajian data), dan Conclusion Drawing/Verification (penarikan kesimpulan). Keabsahan data menggunakan triangulasi sumber dan metode. Hasil penelitian menyatakan (1) Siswa tidak terbiasa mengerjakan soal cerita dengan langkah-langkah yang runtut; (2) Siswa belum memahami permasalahan yang diberikan dengan baik dan benar; (3) Siswa kesulitan dalam membuat model matematika dari permasalahan, (4) Siswa tidak teliti dalam mengerjakan; (5) Siswa belum bisa mengatur waktu dalam mengerjakan soal sehingga terburu-buru; (6) Siswa masih kesulitan dalam konversi satuan.
Analisis Regresi Nonparametrik B-Spline Pemodelan Jumlah Penduduk Miskin Di Provinsi Papua Menggunakan Regresi Nonparametrik B-Spline
Authors: Mahmudah Arik , Handajani Sri Sulistijowati , Pratiwi Hasih
Published: October 2023

Kemiskinan merupakan masalah yang banyak dialami berbagai negara yang dapat disebabkan oleh beberapa faktor antara lain faktor ekonomi, pendidikan, dan pengangguran. Penduduk miskin merupakan penduduk yang memiliki rata-rata nilai pengeluaran per kapita per tahun di bawah garis kemiskinan. Pada tahun 2021, persentase penduduk miskin tertinggi dicapai oleh Provinsi Papua yaitu sebesar 27,38% dibandingkan dengan 33 provinsi lainnya. Selain itu pada tahun sebelumnya, Provinsi Papua juga menjadi provinsi dengan tingkat persentase penduduk miskin tertinggi yaitu sebesar 26,64%. Oleh karena itu, penelitian ini akan menganalisis faktor-faktor yang mempengaruhi jumlah penduduk miskin di Provinsi Papua dengan menggunakan regresi nonparametrik B-spline. Variabel yang digunakan yaitu jumlah penduduk miskin menurut kabupaten/kota tahun 2021 di Provinsi Papua sebagai variabel respon (Y), tingkat pengangguran terbuka menurut kabupaten/kota tahun 2021 sebagai variabel prediktor (X_1), kepadatan penduduk tahun 2021 sebagai variabel prediktor (X_2), dan PDRB ADHK per kapita menurut kabupaten/kota tahun 2021 sebagai variabel prediktor (X_3). Model regresi nonparametrik B-spline diperoleh pada saat knot optimal dengan 1 titik knot pada varibel X_1,X_2,X_3 adalah pada saat X_1 berorde 2, X_2 berorde 2, dan X_3 berorde 2 dengan titik knot X_1 yaitu 0.2357576, titik knot X_2 yaitu 18.49798, dan titik knot X_3 yaitu 74428030 dengan nilai GCV terkecil yaitu sebesar 364.9104. Nilai R_adj^2 yang diperoleh sebesar 0.921196.
Designing Mobile Phone Text Messages Using the Behavior Change Wheel Framework to Influence Food Literacy in Adults With Type 2 Diabetes in Kenya: Protocol for a Systematic Development Study
Authors: Mokaya Moses , Kyallo Florence , Yiga Peter , Koole Janna Lena , Boedt Tessy , Vangoitsenhoven Roman , Matthys Christophe
Published: October 2023

Background

The worldwide prevalence of type 2 diabetes (T2D) has increased in the past decade, and it is projected to increase by 126% by 2045 in Africa. At the same time, mobile phone use has increased in Africa, providing a potential for innovative mobile health interventions to support diabetes care.

Objective

This study aimed to apply the Behavior Change Wheel (BCW) framework to develop text messages to influence food literacy in adults with T2D in urban Kenya.

Methods

The 8 steps of the BCW framework guided the development of text messages: (1) Define the problem in behavioral terms; (2) select target behaviors; (3) specify the target behaviors based on who needs to perform the behaviors, what needs to change, and when, where, how often, and with whom; (4) identify what needs to change; (5) identify intervention functions; (6) select policy categories; (7) select behavior change techniques (BCTs); and (8) select the mode of delivery. Recent exploratory studies in Kenya and other low- and middle-income countries provided information that was used to contextualize the intervention.

Results

In step 1, the behavioral problem was defined as unhealthy dietary patterns among adults with T2D. In step 2, based on a qualitative study in the target population, the target behavior was selected to be evaluation of reliable sources of information, and selection and preparation of healthy food. In step 3, unhealthy dietary patterns were selected. In step 4, 10 domains of the Theoretical Domains Framework were identified, and in step 5, 5 intervention functions were linked to the domains and unhealthy dietary patterns were specified. In step 6, communication and regulations were identified as policy categories, while in step 7, 9 BCTs were selected from the Behavior Change Technique Taxonomy version 1. In step 8, the most suitable mode of delivery was determined to be mobile text messages. A total of 36 mobile text messages were developed based on the 9 BCTs.

Conclusions

This study shows the step-by-step application of the BCW framework to develop mobile text messages to influence food literacy in adults with T2D.

International Registered Report Identifier (IRRID)

RR1-10.2196/48271
Drug Repurposing for Cancers With Limited Survival: Protocol for a Retrospective Cohort Study
Authors: Rodríguez-Molinero Alejandro , Pérez-López Carlos , Salazar González Jose L , Garcia-Lerma Esther , Álvarez-García Juan A , Soria Morillo Luis M , Salas Fernández Tomás
Published: October 2023

Background

Only 5% of the molecules tested in oncology phase 1 trials reach the market after an average of 7.5 years of waiting and at a cost of tens of millions of dollars. To reduce the cost and shorten the time of discovery of new treatments, “drug repurposing” (research with molecules already approved for another indication) and the use of secondary data (not collected for the purpose of research) have been proposed. Due to advances in informatics in clinical care, secondary data can, in some cases, be of equal quality to primary data generated through prospective studies.

Objective

The objective of this study is to identify drugs currently marketed for other indications that may have an effect on the prognosis of patients with cancer.

Methods

We plan to monitor a cohort of patients with high-lethality cancers treated in the public health system of Catalonia between 2006 and 2012, retrospectively, for survival for 5 years after diagnosis or until death. A control cohort, comprising people without cancer, will also be retrospectively monitored for 5 years. The following study variables will be extracted from different population databases: type of cancer (patients with cancer cohort), date and cause of death, pharmacological treatment, sex, age, and place of residence. During the first stage of statistical analysis of the patients with cancer cohort, the drugs consumed by the long-term survivors (alive at 5 years) will be compared with those consumed by nonsurvivors. In the second stage, the survival associated with the consumption of each relevant drug will be analyzed. For the analyses, groups will be matched for potentially confounding variables, and multivariate analyses will be performed to adjust for residual confounding variables if necessary. The control cohort will be used to verify whether the associations found are exclusive to patients with cancer or whether they also occur in patients without cancer.

Results

We anticipate discovering multiple significant associations between commonly used drugs and the survival outcomes of patients with cancer. We expect to publish the initial results in the first half of 2024.

Conclusions

This retrospective study may identify several commonly used drugs as candidates for repurposing in the treatment of various cancers. All analyses are considered exploratory; therefore, the results will have to be confirmed in subsequent clinical trials. However, the results of this study may accelerate drug discovery in oncology.

International Registered Report Identifier (IRRID)

DERR1-10.2196/48925
Digital Therapeutic Intervention for Women in the UK Armed Forces Who Consume Alcohol at a Hazardous or Harmful Level: Protocol for a Randomized Controlled Trial
Authors: Williamson Grace , Carr Ewan , Fear Nicola T , Dymond Simon , King Kate , Simms Amos , Goodwin Laura , Murphy Dominic , Leightley Daniel
Published: October 2023

Background

Alcohol misuse is common in the United Kingdom Armed Forces (UKAF), with prevalence significantly higher than in the general population. To date, digital health initiatives to support alcohol misuse have focused on male individuals, who represent approximately 89% of the UKAF. However, female veterans drink disproportionally more than female members of the public.

Objective

This 2-arm participant-blinded (single-blinded) confirmatory randomized controlled trial (RCT) aims to assess the efficacy of a brief alcohol intervention (DrinksRation) in reducing weekly self-reported alcohol consumption between baseline and a 3-month follow-up (day 84) among women who have served in the UKAF.

Methods

In this 2-arm single-blinded RCT, a smartphone app that includes interactive user-focused features tailored toward the needs of female veterans and designed to enhance participants’ motivations to reduce the amount of alcohol they consume is compared with the UK Chief Medical Officer guidance on alcohol consumption. The trial will be conducted among women who have served at least 1 day of paid service in the UKAF. Recruitment, consent, and data collection will be carried out automatically through the DrinksRation app or the BeAlcoholSmart platform. The primary outcome is change in self-reported weekly alcohol consumption between baseline (day 0) and the 3-month follow-up (day 84) measured using the Timeline Follow Back for alcohol consumption. The secondary outcome is the change in the Alcohol Use Disorders Identification Test score measured at baseline and 3-month follow-up between the control and intervention groups. The process evaluation measures include (1) app use and (2) usability ratings as measured by the mHealth App Usability Questionnaire.

Results

RCT recruitment will begin in January 2024 and last for 5 months. We aim to complete all data collection, including interviews, by May 2024.

Conclusions

This study will assess whether a smartphone app tailored to the needs of women who have served in the UKAF is efficacious in reducing self-reported alcohol consumption. If successful, the digital therapeutics platform could be used not only to support women who have served in the UKAF but also for other conditions and disorders.

Trial Registration

ClinicalTrials.gov NCT05970484; https://www.clinicaltrials.gov/study/NCT05970484

International Registered Report Identifier (IRRID)

PRR1-10.2196/51531
Three Perspectives on Older Adults’ Daily Performance, Health, and Technology Use during COVID-19: A Focus-Group Study (Preprint)
Authors: Cohen Elimelech Ortal , Rosenblum Sara , Tsadok-Cohen Michal , Meyer Sonya , Ferrante Simona , Demeter Naor
Published: October 2023

BACKGROUND

Older adults’ engagement in daily activities was severely impeded during the COVID-19 lockdowns, negatively affecting their physical and mental health. Although technology flourished as a means of performing daily activities in this complex situation, older adults often struggled to use these opportunities effectively. Despite the important role of older adults’ social environments—including their families and health professionals—in influencing their technology use, research into their unique perspectives is lacking.

OBJECTIVE

This study aimed to explore the daily activity performance, health, and technology-use experiences of healthy, independent older Israeli adults (65 years+) during COVID-19 from a three-dimensional perspective: older adults, older adult family members, and health professionals.

METHODS

Nine online focus groups, averaging six to seven participants per group, were conducted with older adults, family members, and health professionals (N=59). Data were analyzed using thematic analysis and the constant comparative method.

RESULTS

The intertwining of daily activity performance and health emerged as a central theme, with differences between the groups. Older adults prioritized their self-fulfilling routines based on motivation and choice, especially with relation to social-familial activities. In contrast, family members and health professionals focused on serious physical and mental health COVID-19 related consequences. A consensus among all three groups revealed the meaningful role of technology usage during this period in bridging functional limitations. Participants delved into technology’s transformative power, focusing on its necessity for engagement in daily activities.

CONCLUSIONS

Using a three-dimensional approach, this study illustrates the profound interplay between daily activities performance, physical and mental health, and technology use. Its focus on technology’s uses and benefits sheds light on what older adults need to increase their technology use. Interventions for improving digital activity performance can be tailored to meet older adults’ needs and preferences by focusing on motivational and preference-related activities.
Effectiveness of Technological Interventions for Older Adults With Parkinson Disease: Systematic Review (Preprint)
Authors: Bevilacqua Roberta , Benadduci Marco , Barbarossa Federico , Amabili Giulio , Di Donna Valentina , Martella Clotilda , Pelliccioni Giuseppe , Riccardi Giovanni Renato , Maranesi Elvira
Published: October 2023

BACKGROUND

Among the older population, Parkinson disease (PD) stands out as a leading contributor to disability. Clinically, the foremost objectives in managing PD involve proactively delaying and preventing disability. Understanding the pivotal role of gait and balance in daily functionality holds substantial clinical significance, signaling imminent disability and prompting a reevaluation of management approaches. A key priority lies in identifying novel and effective interventions for symptoms that substantially contribute to disability.

OBJECTIVE

This paper presents a systematic review that critically examines the existing body of literature on the use of technology in the rehabilitation of older patients with PD. By synthesizing current evidence, we aim to provide insights into the state of the field, identify gaps in knowledge, and offer recommendations for future research and clinical practice.

METHODS

A systematic review of the literature was conducted in September 2023 analyzing manuscripts and papers of the last 5 years from the PubMed, Scopus, Embase, Web of Science, and CINAHL databases following PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. A total of 14 papers were included. The inclusion criteria are as follows: (1) randomized controlled trial, (2) PD in people aged 65 years and older, and (3) use of technology in the rehabilitation training in the older population.

RESULTS

A large portion of effective interventions relies on the incorporation of technology, particularly through virtual reality exergames. This technology appears to have effects not only on the cognitive aspect but also on the physical domain. The analysis of the results clearly indicates that, in terms of gait and balance performance, the technological intervention outperforms the traditional approach, irrespective of the specific technology employed.

CONCLUSIONS

This systematic review seeks to shed light on the evolving landscape of technology-assisted rehabilitation for older individuals with PD. As we delve into the available evidence, we will assess the extent to which technology can serve as a valuable adjunct to conventional therapy, offering new avenues for optimized care and improved outcomes in this growing patient demographic. As we sift through the existing evidence, our goal is to evaluate the potential of technology as a valuable supplement to traditional therapy, presenting fresh opportunities for enhanced care and better outcomes in this expanding patient demographic.