bluuebunny/crossref_metadata_2025 huggingface dataset:
Pengukuran Intensitas Radiasi Matahari di Wilayah Kabupaten Nganjuk Tahun 2016
Authors: Mubiyn Shidqi Nur , Ilminnafik Nasrul
Published: March 2024

Radiasi matahari merupakan faktor alam yang sangat penting bagi kehidupan manusia dan lingkungan. Radiasi matahari berperan dalam berbagai aspek kehidupan sehari-hari, termasuk mendorong pertumbuhan tanaman, memberi daya pada pembangkit listrik tenaga surya, dan berdampak signifikan terhadap kondisi atmosfer, iklim, dan cuaca di berbagai wilayah di dunia. Radiasi matahari juga berperan dalam berbagai aspek sains, seperti fisika, meteorologi, dan ekologi. Metode pengambilan data adalah langkah kunci dalam penelitian yang berfokus pada penggunaan sumber data dari website Photovoltaic Geographical Information System (PGIS). PGIS adalah sumber data yang sangat penting dalam studi ini karena menyediakan informasi terkini tentang sebaran sistem fotovoltaik (PV) di Kabupaten Nganjuk. Metode pengambilan data yang tepat akan memastikan bahwa data yang digunakan dalam penelitian ini akurat dan relevan. Pada tahun 2016, nilai rata-rata akumulasi radiasi gobal pada Kabupaten Nganjuk mencapai 156,21 kW/m2. Tingkat radiasi ini mencerminkan potensi energi surya yang dapat dihasilkan di Kabupaten Nganjuk. Dalam hal produksi energi surya, terjadinya hujan dan tutupan awan, terutama pada musim hujan dapat menjadi tantangan dalam input data. Beberapa wilayah seperti Nganjuk radiasi maksimum tercapai di musim kemarau. Fenomena yang terjadi pada Kabupaten Nganjuk menunjukkan bahwa radiasi matahari mencapai puncaknya pada bulan Agustus yang mencapai 180,67kWH/m2. Pengamatan ini menjadi penting untuk memberikan kontribusi dalam pemahaman mengenai variasi musiman radiasi matahari di wilayah Kabupaten Nganjuk serta menjadi dasar informasi yang penting untuk perencanaan dan pengembangan sumber energi surya.
SYSTEMATIC LITERATURE REVIEW (SLR): SUMBER ENERGI TERBARUKAN : POTENSI KOTORAN TERNAK DAN LIMBAH PERTANIAN UNTUK PRODUKSI BIOGAS BERKELANJUTAN
Authors: Fitri Nisa Cantika , Hamdi Hamdi
Published: March 2024

Biogas memiliki potensi yang signifikan sebagai sumber energi terbarukan untuk aplikasi industri dan domestik serta solusi efisien terhadap krisis energi global . Meningkatnya penggunaan bahan bakar fosil dan kekhawatiran lingkungan atas emisi gas rumah kaca dan perubahan iklim telah membangkitkan minat terhadap bio-gas sebagai sumber energi alternatif terbarukan. Biogas dapat dibuat dari biomassa yang berbeda seperti kotoran unggas, limbah tanaman pertanian, dan kotoran ternak dengan degradasi anaerobik yang terkendali. Penelitian ini bertujuan untuk mengidentifikasi perkembangan penelitian biogas dari seluruh dunia yang diperoleh dari jurnal internasional terkait pada tahun 2018 - 2023. Metode yang digunakan dalam penelitian ini adalah metode Systematic Literature Review (SLR). Metode SLR digunakan untuk mengidentifikasi, mengkaji, mengevaluasi, dan menyimpulkan semua penelitian yang ada dengan bidang topik yang menarik, dengan pertanyaan penelitian spesifik yang relevan. Data diperoleh dengan melakukan pencarian jurnal dengan aplikasi publish or perish ditemukan 160 jurnal  yang diperoleh dari database Google Scholar. Kemudian jurnal tersebut disaring berdasarkan jenis artikelnya dan jika jumlah sitasi lebih dari 32 maka diperoleh 76 artikel yang akan direview. Metode SLR ini menunjukkan perkembangan penelitian Biogas di beberapa negara .
„Hexenjagd im Bayern-Staat“: Die Universitätsbibliothek der LMU München und die Holzer-Affäre 1974
Authors: Kuttner Sven
Published: March 2024

Im Sommer 1974 stand die Universitätsbibliothek der LMU München unter einem gravierenden Zensurverdacht: Ihr wurde vorgeworfen, Werke des Soziologen und DKP-Mitglieds Horst Holzer der Benutzung absichtlich entzogen zu haben. Der Vorfall löste ein gewaltiges Presseecho in Westdeutschland aus, schien er doch alle Klischees eines repressiven CSU-Staates in Bayern zu bestätigen. Auch eine vom Verein Deutscher Bibliothekare eingesetzte Arbeitsgruppe „Behinderung der Informationsfreiheit bzw. von Informationszugang“ beschäftigte sich mit den inkriminierten Vorwürfen. Der Essay rekonstruiert anhand von archivalischem Quellenmaterial die Affäre und kontextualisiert sie mit den Studentenunruhen an der LMU.
Nutraceutical potential of Mesembryanthemum forsskaolii Hochst. ex Bioss.: Insights into its nutritional composition, phytochemical contents, and antioxidant activity
Authors: Qahtan Ahmed A. , Alatar Abdulrahman A.
Published: March 2024

Mesembryanthemum forsskaolii Hochst. ex Bioss is a resilient succulent plant in the Aizoaceae family. This plant has been recognized for its nutritional and metabolic benefits, but its potential remains underexplored. The aim of this research is to analyze the nutritional composition, phytochemical content, and antioxidant potential of M. forsskaolii. The protein content, total sugars, macro-, and micronutrients were estimated in seeds, leaves, and stems of the studied plant. To investigate the phytochemical profiles and antioxidant capacity, GC-MS analysis, determination of total phenolic, flavonoid, and tannin contents, ferric reducing antioxidant power (FRAP) and total antioxidant activity (TAC) tests, and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging assays were conducted. The soluble protein (147.55 mg g−1 DW), total protein (341.23 mg g−1 DW), total carbohydrate (0.258 mg mL−1), and nitrogen (26.152 mg g−1) contents of M. forsskaolii seeds were the highest. Phytochemical analysis revealed the presence of several compounds, such as β-sitosterol, phthalic acid, and phytol, which have potential antioxidative, anti-inflammatory, and antimicrobial properties. Seeds showed the greatest presence of phenols, flavonoids, and tannins, indicating high antioxidant activity in FRAP and TAC tests. The ABTS and DPPH scavenging assays showed that the antioxidant activity increased proportionally with concentration in all plant parts. However, seeds consistently demonstrated the greatest capacity. This study provides a detailed analysis on the dietary protein, carbohydrates, essential nutrients, and antioxidants that can be obtained from M. forsskaolii, highlighting its potential as a valuable source of nutrition and phytochemicals.
Examining the Structural Relationships Between Pre-Service Science Teachers’ Intention to Teach and Perceptions of the Nature of Science and Attitudes
Authors: Alazzam Sulaf , AlEeassa Mohammad , Alquraan Mahmoud , Almughrabi Ayat
Published: March 2024

The current study aimed to examine the structural relationships between pre-service science teachers’ intention to teach and perceptions of the nature of science (NOS) and attitudes toward teaching science. The sample consisted of 206 pre-service science teachers from a major university in the United Arab Emirates who have bachelor’s degrees in science. Quantitative research methodology was used to study the structural relationships among pre-service science teachers’ intention to teach, perceptions of the NOS, and attitudes. Structural equation modeling using the Lavaan package was used to test these structural relationships. The results show that the relationships between the indigenous constructs (NOS) and the mediator constructs (DAS) can predict pre-service science teachers’ intention to teach science (p < 0.05).
Element geochemical differences in lower Cambrian black shales with hydrothermal sedimentation in the Yangtze block, South China
Authors: Huang Yanran , Luo Man , Zhang Fan , Cao Taotao , Yu Ye , Duan Chenzhang , Gao Junjian
Published: March 2024

Hydrothermal activities occurred in the Yangtze block, South China, and affected the process of black shale sedimentation in the early Cambrian. Their specific influences, such as the sources, sedimentary environment, and mineralization, have not yet been revealed. Fortunately, the influences are explained through the geochemistry comparison of different wells FY1, XJ1, HY1, and XA1 in northwestern Hunan. The outcomes of the tectonic setting, distinguishable by element indicators, are disorganized. This is caused by the variable element composition, sedimentary recirculation of material source, and hydrothermal materials. FY1, the closest well to Zhangjiajie where Ni–Mo ores were formed by hydrothermal sedimentation, has more different features on the elemental geochemistry, but many indexes still indicate that it is normal sediments. XA1, which is far from the other wells and deposited in the deep-water basin, has significantly more differences in geochemical properties and shows more about normal marine deposition. XJ1 and HY1 are intermediate between them. Based on these wells, the hydrothermal contribution to the black shale sedimentation is not significant. However, some contents of trace and rare earth elements change widely because hydrothermal materials can diffuse and deposit over long distances. The concentration of Ag, As, Ba, Mo, Ba, U, and V generally has dozens of times higher than that of Upper Continental Crust. The early Cambrian environment was primarily anoxic/euxinic with enough sulfur, which is beneficial for enriching metal elements and organic matter. The sequence FY1, XJ1, HY1, and XA1 in turn has the same performance on the distance with Zhangjiajie, different intervals of suboxic environment and element enrichment, and hydrothermal-fluid-addition Ni abundance. Therefore, hydrothermal processes indeed provide materials for element enrichment and support the reducing environment, but the impact of hydrothermal activity decreases on the plane.
Spatialities of Heritage Geographies in South Africa: Preface to the Thematic Issue of Modern Geográfia
Authors:   Department of Geography and Environmental Studies, Small Town Research Unit, Faculty of Arts and Social Sciences, Stellenbosch University, Ronnie Donaldson , Tésits Róbert ,   Institute of Geography and Earth Sciences, University of Pécs
Published: March 2024

The Institute of Geography and Earth Sciences at the University of Pécs, which serves as the foundation for our journal, maintains a longstanding partnership with Stellenbosch University, particularly with its team of dedicated geographers. This collaboration led to a visit from Professor Ronnie Donaldson, our guest editor for this issue, who joined us in May 2023 at our invitation. During his visit, in addition to delivering an insightful lecture on rural gentrification, the seeds of this special issue were sown, providing an exciting opportunity to showcase current research from the Small Town Research Unit of the Department of Geography and Environmental Studies at Stellenbosch University, as well as other esteemed geography departments in South Africa, including Rhodes University, North-West University, and the University of Johannesburg.
Creative Destruction and Built Environment Heritage in Makhanda, South Africa
Authors:   Department of Geography, Rhodes University, Zandile Nombulelo Dlongolo , Philippa Margaret Irvine ,   Department of Geography, Rhodes University, Sinenhlanhla Memela ,   Department of Geography, Rhodes University
Published: March 2024

Heritage conservation is recognised as an important component of sustainable development but is often considered a lower priority compared to other development imperatives, and societal issues. The prioritization of economic and urban development threatens urban heritage through a process known as creative destruction. This research uses the concept of creative destruction to explore the interplay between market forces and urban planning and management practices on the heritage conservation of the city of Makhanda in South Africa. Makhanda has a rich and varied cultural heritage landscape, including many individual buildings and streetscapes. A qualitative approach, including semi-structured key informant interviews and secondary sources was employed. The study found that municipal dysfunction and other urban management challenges result in difficultly in enforcing legislation and policy, and thereby threatens heritage conservation. The fates of three buildings within the historic urban fabric of the city are explored in terms of the impacts of neoliberal urbanism occurring within this context. The research contends that for heritage management to be successful, there needs to be a balanced approach through improvements in stakeholder relationships, governance, institutional capacity, knowledge sharing and community involvement in decision-making processes.
PENGEMBANGAN MEDIA PEMBELAJARAN FLIPBOOK UNTUK MENINGKATKAN HASIL BELAJAR SISWA KELAS V PELAJARAN IPS
Authors: Amalia Silvia Nisa
Published: March 2024

Penelitian ini bertujuan untuk mengembangkan media pembelajaran flipbook, menguji kelayakan, dan keefektifan terhadap hasil belajar IPS siswa kelas V SDN Gajahmungkur 02, Kota Semarang. Penelitian ini menggunakan metode penelitian Research and Development (R&D). teknik pengumpulan data dengan tes, observasi, angket, wawancara, dan dokumentasi. Teknik analisis data menggunakan analisis kelayakan media, analisis tanggapan guru dan siswa, uji normalitas, uji-t, serta n-gain. Hasil pengembangan dalam bentuk media berupa media pembelajaran flipbook. Hasil uji kelayakan flipbook dengan persentase kelayakan penyajian sebesar 98,44% dan kelayakan isi sebesar 95,31% dengan kategori “sangat layak”. Uji keefektifan dengan hasil uji perbedaan rata-rata uji-t diperoleh nilai sig (2-tailed) sebesar 0,000<0,050. Pada hasil uji thitung 13,636 > ttabel 2,09 dan Ha diterima. Sehingga terdapat perbedaan signifikan antara hasil pretest dan posttest siswa. Pada peningkatan rata-rata (n-gain) data pretest dan posttest diperoleh hasil sebesar 0,65 dengan kriteria “sedang”. Uji keefektifan media diketahui melalui perhitungan uji keefektifan media memperoleh skor 88% dengan kategori “efektif” sebagai penunjang pembelajaran.
KEEFEKTIFAN BUKU CERITA BERGAMBAR BERBASIS APLIKASI FLIPBOOK PADA KOMPETENSI MENGGALI INFORMASI SISWA KELAS III
Authors: Sukenti Riski
Published: March 2024

Abstrak

Penelitian ini bertujuan mengembangkan Buku Cerita Bergambar berbasis Aplikasi Flipbook, menguji kelayakan dan keefektifan dengan menguji perbedaan hasil belajar sebelum dan sesudah menggunakan media di SD IT Al-Umar Ngargosoka Magelang. Jenis penelitian RnD. Prosedur pengembangan media model Borg and gall. Kelayakan media diambil berdasarkan uji validasi ahli, uji skala kecil, dan uji skala besar. Teknik pengumpulan data wawancara, dokumen, angket, dan tes. Teknik analisis data meliputi analisis data awal dan analisis data akhir. Hasil penelitian menunjukan rata-rata penilaian sebesar 93,88 (ahli media 94,44% dan ahli materi 93,33%), dengan kriteria “sangat layak”. Hasil tanggapan guru dan siswa setelah menggunakan media 94% dan 90% kriteria “sangat efektif”. Peningkatan karakter gotong royong dan bernalar kritis yaitu 3,375 (sangat baik). Nilai pretest 68,71 menjadi 84,165 dengan peningkatan 15,455. Nilai sig. (2-tailed) 0,030 (skala kecil)  dan 0,000 (skala besar) artinya < 0,05, maka bahwa H0 ditolak dan Ha diterima berarti data memiliki perbedaan signifikan antara variable awal dan variable akhir. Rata-rata N-gain 0,5809 (sedang) dan dalam persen N-gain 58,09% (cukup efektif). Simpulan penelitian yaitu media layak dan efektif meningkatkan hasil belajar siswa kelas III. Sarannya yaitu perlu menyiapkan alternatif media terkait kendala jaringan dengan mengunduh dalam bentuk PDF.

Abstract

This study aims to develop a Flipbook Application-based Picture Story Book, test the feasibility and effectiveness by examining differences in learning outcomes before and after using the media in SD IT Al-Umar Ngargosoka Magelang. This research uses RnD type. The procedure of development uses media of Borg and gall model. Media feasibility was taken based on expert validation tests, small-scale tests, and large-scale tests. Data collection techniques are interviews, documents, questionnaires, and tests. Data analysis techniques include initial data analysis and final data analysis. The results showed an average rating of 93.88 (94.44% media experts and 93.33% material experts), with the criteria of "very decent". The results of the responses of teachers and students after using the media were 94% and 90% "very effective" criteria. The increase in the character of mutual cooperation and critical reasoning is 3.375 (very good). The pretest score was 68.71 to 84.165 with an increase of 15.455. sig. value (2-tailed) 0.030 (small scale) and 0.000 (large scale) means <0.05, so that H0 is rejected and Ha is accepted means that the data has a significant difference between the initial variable and the final variable. The average N-gain is 0.5809 (moderate) and in percent N-gain is 58.09% (quite effective). The conclusion of the research is that the media is feasible and effective in improving the learning outcomes of class III students. The suggestion is that it is necessary to prepare alternative media related to network constraints by downloading in PDF form.
IMPLEMENTASI IMPLEMENTASI MODEL PEMBELAJARAN NHT DENGAN MEDIA KARTU KERJA PADA PEMBELAJARAN MATEMATIKA
Authors: Antara A.A. Bagus Tri Rama
Published: March 2024

Penelitian ini bertujuan untuk mengetahui perbedaan keefektifan penerapan model pembelajaran kooperatif tipe NHT dengan media kartu kerja dibandingkan dengan penerapan model pembelajaran ekspositori dengan media power point ditinjau dari kemampuan siswa menyelesaikan soal cerita matematika kelas V SD Negeri Sekaran 01. Penelitian ini merupakan penelitian kuantitatif dengan menggunakan desain quasi experimental. Penelitian ini menggunakan teknik analisis data yang meliputi uji prasyarat, uji persamaan rata-rata, dan analisis data akhir. Hasil uji KKM pada kelas eksperimen mencapai KKM tidak kurang dari 75%, sedangkan pada kelas kontrol tidak mencapai KKM. Hasil uji t-test memperoleh nilai signifikansi (2- tailed) 0,001 < 0,5 sehingga H0 ditolak. Hasil uji n-gain menunjukkan nilai kelas eksperimen lebih tinggi dibanding kelas kontrol (0,72 > 0,65). Simpulan dari penelitian ini yaitu penerapan model pembelajaran NHT dengan media kartu kerja lebih efektif dibandingkan dengan penerapan model pembelajaran ekspositori dengan media power point ditinjau dari kemampuan siswa menyelesaikan soal cerita matematika materi pengolahan data kelas V SD Negeri Sekaran 01.
PENGEMBANGAN MEDIA PEMBELAJARAN KARTABAR PONTA SENI TARI DI SDN WONOSARI 03
Authors: Andriana Hana , Ary Deasylinada
Published: March 2024

Abstrak

Penelitian ini dilatarbelakangi oleh data observasi yang menunjukkan perolehan hasil belajar siswa pada materi pola lantai sangat rendah. Berdasarkan permasalahan yang ditemukan prapenelitian adalah penggunaan media yang masih terbatas, kurang kreatif, inovatif, dan menarik perhatian siswa sehingga siswa mudah bosan dalam kegiatan pembelajaran. Penelitian ini bertujuan untuk mengetahui bagaimana pengembangan, kelayakan, dan keefektifan media kartabar ponta untuk meningkatkan hasil belajar seni tari materi pola lantai. Penelitian ini merupakan penelitian Research adn Development (R&D). Data penelitian diperoleh melalui wawancara, tes, angket, dan dokumen. Teknik analaisis data menggunakan analisis produk, analisis data awal, dan analisis data akhir.  Metode yang digunakan dalam penelitian ini adalah metode snowball throwing dan model Borg and Gall. Hasil penelitian ini menunjukkan bahwa kartabar ponta dinyatakan sangat layak digunakan media pembelajaran. Hasil belajar pretest dan posttest dihitung menggunakan n-gain mengalami peningkatan sebesar 0,38 dengan selisih rata-rata 12,3 dengan kategori sedang, uji perbedaan rata-rata menggunakan uji-t diperoleh nilai sig (2-tailed) 0,000<0,05 maka terdapat perbedaan yang signifikan antara hasil belajar pada pretest dan posttest

 

Abstract

This research is motivated by observational data which shows the acquisition of student learning outcomes in the floor pattern material is very low. Based on the problems found in the pre-research, the use of media is still limited, less creative, innovative, and attracts students' attention so that students get bored easily in learning activities. This study aims to find out how the development, feasibility, and effectiveness of kartabar ponta media to improve learning outcomes in the art of floor pattern dance material. This research is a Research and Development (R&D) study. Research data obtained through interviews, tests, questionnaires, and documents. Data analysis techniques use product analysis, initial data analysis, and final data analysis. The method used in this study is the snowball throwing method and the Borg and Gall model. The results of this study indicate that kartabar ponta is declared very suitable for use as learning media. Pretest and posttest learning outcomes calculated using the n-gain increased by 0.38 with an average difference of 12.3 in the medium category, testing the average difference using the t-test obtained a sig (2-tailed) value of 0.000 <0.05 then there is a significant difference between learning outcomes in the pretest and posttest.
PENGEMBANGAN MEDIA VIDEO ANIMASI ANIMAKER MATERI PENGARUH KONDISI GEOGRAFIS INDONESIA KELAS V
Authors: Qurotu Aini Laili Isnia , Prasetyaningtas Fitria Dwi
Published: March 2024

Abstrak

Penelitian ini bertujuan mengembangkan, menguji kelayakan, dan keefektifan media video animasi berbasis animaker sebagai media pembelajaran materi pengaruh kondisi geografis Indonesia kelas V SDN Tegowanu 4 Kabupaten Demak. Teknik pengumpulan data menggunakan teknik tes dan nontes. Jenis penelitian adalah Research & Development (R&D). Hasil penelitian diperoleh (1) media pembelajaran didesain dengan beberapa slide yang berisikan materi, gambar, animasi dan iringan musik yang sesuai, menggunakan jenis huruf yang dapat dibaca dengan jelas, menggunakan bahasa yang mudah dipahami, serta pemilihan warna yang cerah; (2) Media video animaker dinyatakan sangat layak berdasarkan penilaian ahli materi sebesar 87,5%, dan ahli media sebesar 86,36%; (3) hasil uji paired sample T-tes jka sig.(2-tailed) <0,005 maka dikatakan ada perbedaan antara hasil pretest dan posttest. Hasil perhitungan menunjukkan perolehan angka <0,001 dengan demikian dapat dikatakan bahwa ada perbedaan antara hasil pretest dan posttest pada kelompok kecil dan kelompok besar. Uji N- Gain kelompok kecil diperoleh sebesar 0,549 kriteria “sedang” dan kelompok besar diperoleh sebesar 0,609 dengan kriteria “sedang”. Simpulan dari penelitian ini yaitu media pembelajaran video berbasis animaker “sangat layak” dan efektif diterapkan untuk meningkatkan hasil belajar siswa kelas V muatan pelajaran IPS.

 

This research aims to develop, test the feasibility and effectiveness of animaker-based video learning medium for the material on the influence of Indonesia's geographical conditions in grade V students at SDN Tegowanu 4, Demak Regency. Data collection techniques using test and non-test techniques. The type of research is Research & Development (R&D). The results of the study obtained (1) learning media is designed with several slides containing material, images, animations and appropriate musical accompaniment. Using fonts that can be read clearrly, using language that is easy to understand, and choosing bright colors; (2) animaker video media is declared very feasible based on the assessment of material experts at 87.5%, and media experts at 86.36%; (3) the results of the paired sample T-test if sig.(2-tailed) <0.005 then it is said that there is a difference between the pretest and posttest results. The calculation results show that the score is <0.001, so it can be said that there is a difference between the pretest and posttest results in the small group and the large group. The N- Gain test for the small group was obtained at 0.549 with the criteria for a "medium" increase and for the large group it was obtained at 0.609 with the criteria for a "medium" increase. The conclusion of this research is that animaker-based video learning media is "very feasible" and can be effectively applied to improve the learning outcomes of V grade students with Social Studies.
PENGEMBANGAN MEDIA CERITA BERGAMBAR BERBASIS ARTICULATE STORYLINE PADA MUATAN PELAJARAN BAHASA INDONESIA
Authors: Lestari Janatun Tri
Published: March 2024

Penelitian ini dilatar belakangi oleh rendahya keterampilan siswa dalam menulis  kalimat efektif. Hal ini terjadi karena kurangnya media pembelajaran Bahasa Indonesia yang inovatif. Penelitian ini bertujuan untuk mengembangkan media cerita bergambar berbasis Articulate Storyline untuk siswa kelas III SD, menguji kelayakan cerita bergambar berbasis Articulate Storyline, dan menguji keefektifan cerita bergambar berbasis Articulate Storyline. Jenia penelitian ini Research and Develompent (R&D). Prosedur penelitian ini menggunakan model Borg and Gall. Hasil uji kelayakan media cerita bergambar berbasis Articulate Storyline yaitu dari ahli materi sebesar 89,4%, ahli media sebesar 97,8% dan ahli materi sebesar 95%. Media cerita bergambar berbasis Articulate Storyline efektif digunakan dalam pembelajaran Bahasa Indonesia. Hasil uji t menunjukkan bahwa media cerita bergambar berbasis Articulate Storyline efektif untuk meningkatkan hasil belajar keterampilan menulis kalimat efektif. Uji N-Gain pretest dan posttest diperoleh sebesar 0,45 kriteria “sedang”. Simpulan penelitian ini adalah media yang dikembangkan sangat layak dan efektif digunakan dalam pembelajaran Bahasa Indonesia serta dapat meningkatkan keterampilan siswa dalam menulis kalimat efektif.

This research was motivated by the poor skill of students in writing effective sentences. This occured due to the lack of innovative learning media in Bahasa Indonesia subject. This study aimed to develop Articulate Storyline based illustrated story media for Grade III elementary school students, testing the feasibility of Articulate Storyline based illustrated stories, and testing the effectiveness of Articulate Storyline based illustrated stories. The research method used is Research and Development (R&D).  The feasibility test results of Articulate Storyline based Illustrated story media are from material experts at 89.4%, media experts at 97.8% and material experts at 95%. The results of the T test showed that Articulate Storyline based picture story media is effective for improving the learning outcomes of effective sentence writing skills. Test n-gain pretest and posttest obtained by 0.45 criteria”medium". The conclusion of this research is that the media developed was very viable and effective in learning and can improve students' skills in writing effective sentences.
PENGEMBANGAN MEDIA PEMBELAJARAN BIG BOOK PADA TEMA TUGASKU SEHARI-HARI KELAS II SD
Authors: Hanjani Nurul Aulia , Silalahi Beta Rapita , Surya Muhammad Kafi
Published: March 2024

This development research aims to determine the feasibility of big book learning media on the theme of my daily tasks in class II SD. This research is a Research and Development (R&D) research with the 4D development model. The development steps taken by researchers are: 1) Pedefiisian stage (define), 2). Design stage, 3). Development stage, and 4). Dissemination stage with data collection techniques using a questionnaire. The data analysis technique uses descriptive qualitative. Validation was carried out by material experts, media experts, and learning experts. The overall results of the assessment by material experts obtained an average score of 78.75% with the criteria Valid (Eligible) to be used as learning media for grade II elementary school students on the theme of My Daily Tasks. The overall results of the assessment by media experts obtained an average score of 82% with very valid criteria to be used as learning media for grade II elementary school students on the theme of My Daily Tasks.  And the overall results by learning experts obtained an average score of 88.75%. This percentage includes very valid criteria to be used as learning media in the learning activities of grade II elementary school students on the theme of My Daily Tasks.
Primary hyperparathyroidism: predictors of sporadic multi-gland disease
Authors: Yang Lu , Jing Xingguo , Pang Hua , Guan Lili , Li Mengdan
Published: March 2024

In this review, we discuss the definition, prevalence, and etiology of sporadic multiglandular disease (MGD), with an emphasis on its preoperative and intraoperative predictors. Primary hyperparathyroidism (PHPT) is the third-most common endocrine disorder, and multiglandular parathyroid disease (MGD) is a cause of PHPT. Hereditary MGD can be definitively diagnosed with detailed family history and genetic testing, whereas sporadic MGD presents a greater challenge in clinical practice, and parathyroidectomy for MGD is associated with a higher risk of surgical failure than single gland disease (SGD). Therefore, it is crucial to be able to predict the presence of sporadic MGD in a timely manner, either preoperatively or intraoperatively. Various predictive methods cannot accurately identify all cases of sporadic MGD, but they can greatly optimize the management of MGD diagnosis and treatment and optimize the cure rate. Future research will urge us to investigate more integrative predictive models as well as increase our understanding of MGD pathogenesis.
Deuterium NMR and Water Adsorption Studies of the Effect of Beating on the Water-cellulose Interaction
Authors:   Department of Physical Chemistry, Royal Institute of Technology, Tie-Qiang Li , Henriksson Ulf ,   Department of Physical Chemistry, Royal Institute of Technology, Eriksson Jan Christer ,   Department of Physical Chemistry, Royal Institute of Technology, Ödberg Lars ,   Swedish Pulp and Paper Research Institute
Published: March 2024

The interaction between water and cellulose has been studied by deuterium NMR and water sorption isotherm measurements for a bleached kraft pulp and an unbleached liner board pulp beaten to various degrees. Measurements of 2H quadrupole splittings, spin lattice relaxation rates and half height line width shave been carried out at different relative humidities. Furthermore, the spin-lattice relaxation rates at 86%relative humidity were measured in the frequency range 2-62 MHz for the bleached kraft pulp, unbleached liner board pulp and for a microfibrillated cellulose sample. The relaxation rates show a strong dependence on the resonance frequency. The reorientation of the water molecules adsorbed on fibers can be described by two corrletion times of the order of 10 ns and 50ps respectively. Analysis of the experimental data does not show any effects of beating on the cellulose water interaction strength. All observations made can be explained by morphological changes of the fibers.
The Use of Potentiometric Titration and Polyelectrolyte Titration to Measure the Surface Charge of Cellulose Fibre
Authors:   Pira, Paper and Board Division, Randalls Road, Leatherhead, Surrey KT22 7RU, England, Gill R. I. S.
Published: March 2024

The surface charge of cellulosic fibre was determined using two methods . The relative surface charge (PTC) of three bleached pulps was quantified using polyelectrol to titration and compared with the absolute surface charge (So) measured by potentiometric titration. It was established that the polyelectrolyte titration method was a less tedious, but valid method of determining the surface charge of fibre, providing the titration method is standardised and the effect of variables such as suspension, pH, fibre concentration, ionic content and polyelectrolyte molar mass are eliminated. The method was used to construct a charge/pH isotherm of a bleached hardwood fibre similar to those constructed using potentiometric titration. Furthermore, the effect of refining of bleached hardwood and softwood krafts on the PTC was investigated.
Optimization of Pigment Performance in Paper
Authors:   Pulp and Paper Research Institute of Canada, Alince B.
Published: March 2024

The apparent light-scattering coefficient of a given pigment in filled papers depends on the state of pigment dispersion and the beating level of fibers. This effect is seen on handsheets containing pigments deliberately introduced either as individual particles or as aggregates; well dispersed T102 is optically superior and its contribution to the total light scattering increases with fiber beating. In order to achieve retention of dispersed pigment particles and to avoid their flocculation caused by polymeric retention aid, the pigment, prior to its addition to the fiber suspension, can be treated with a cationic polyelectrolyte. Since pigment introduction results in tensile strength loss, which is most pronounced with dispersed particles, a plot of optical properties versus tensile strength provides a means for evaluating the pigment effectiveness and for comparing different pigments.
Finite Element Modeling of the Embossing of Paper Sheets
Authors:   Department of Mechanical Engineering, Auburn University, Suhling J. C. , Liang S. ,   Department of Mechanical Engineering, Auburn University
Published: March 2024

Embossing processes are often used to increase the surface area of low basis weight papers giving them better absorbency properties. They also serve to add surface texture and increase ply bonding in multi-layer papers. The mechanical properties (e.g., stiffness and strength)of paper sheets are significantly effected in a detrimental manner by embossing. In this work, an initial study of the paper embossing process has been performed using finite element analysis. The paper was modeled as a nonlinear inelastic orthotropic solid and the rubber was taken to be an incompressible hyperelastic material. Interface elements were introduced to simulate the behavior of the contact surfaces. Since the measured mechanical properties of the paper under consideration were highly dependent on moisture content, analyses were performed at relative humidity levels of 50% and 90%. Permanent deformations, and residual stresses and strains in embossed paper sheets have been calculated. Also, the changes in the mechanical behavior of paper sheets due to embossing have been predicted.
Plane Stress Fracture Toughness and its Measurement for Paper
Authors:   Pulp and Paper Research Institute of Canada, Seth R. S.
Published: March 2024

Fracture toughness is a material’s ability to resist propagation of a preexisting crack. In most end uses where fracture,toughness can be an important performance parameter for paper, stresses are applied in the plane of the sheet. Therefore, like tensile strength and elastic modulus, the fracture toughness of paper should be measured under in ‘ -plane loading. Our current industry practice of measuring the out-of plane tearing resistance by the Elmendor for Brecht-Imset tests seems inappropriate. Several techniques of fracture mechanics have been applied in recent years to characterize the plane stress fracture toughness of paper. An important consideration is whether a material property was measured particularly for tough papers.This contribution provides a background on these techniques.
Computer Simulations of Paper Strength – Prepared Contribution
Authors:   CSC - Scientific Computing Ltd, Finland, Raisenen V. , Nieminen R. ,   Laboratory of Physics, Helsinki University of Technology, Finland, Niskanen K. ,   USDA Forest Service, Forest Products Laboratory, USA
Published: March 2024

We study the strength of paper using computer simulations. Our model is a stressed mechanical 2D random fibre network (RFN), the equilibrium of which is computed using a commercial FEM (Finite Element Method) solver Abaqus. The novelty in our approach lies in more detailed introduction of mechanical properties of fibres and bonds into the mechanical model, enabling the study of effects of microscopic (fibre/bond – level) properties.on relations between macroprocessor properties. The mechanical properties of fibres and bonds are defined by Young’s modulus (or moduli in anisotropic case) and stress displacement curve. In our video presentation, fibres are purely elastic whereas bonds are elastic-plastic. The video shows the behaviour of network being stressed by forcing increasing displacement on one boundary
Converting Challenges to Paper and Board
Authors:   Papiertechnische Stiftung PTS, Baumgarten H. L. , Wilken R. ,   Papiertechnische Stiftung PTS, Hartmann B. ,   Papiertechnische Stiftung PTS
Published: March 2024

The paper converting process forms part of that whole area of engineering known as conversion technology, which applies the rules and procedures acquired in converting to the manufacture of finished products from paper and board. The resulting conversion techniques consist of a sequence of sub processes in which certain changes in the state of the materials are brought about. The sum of these changes leads from the raw materials paper and board up to the final products. For the reshaping, separating and connecting processes covered by this report, the specific characteristics and physical principles will be described and the main options of technical realisation discussed. In a number of applied examples, details of the real physical mechanisms encountered in the individual processes will be gone into. The state of knowledge just set out is required for optimised designing of paper and board articles as well as of the necessary procedures and machinery. It is furthermore an absolute necessity with a view to realising the best possible manufacturing processes whilst taking ecological and work hygiene considerations into account and putting the means of production to economical use.
THE GENRE FEATURES OF THE WORKS OF DIMITRY ROSTOVSKY ABOUT THE ILYA ICON OF THE HOLY MOTHER
Authors: Fedotova Marina
Published: March 2024

The author of the article examines the two earliest works by St. Dimitry Rostovsky — “The Miracles of the Most Holy and Blessed Virgin Mary” (1677) and “The Bedewed Fleece” (first edition 1683), created on the basis of the first work. Both books, in terms of content and genre characteristics, represent a legend about the miraculous icon — the Ilya Icon of the Holy Mother of God. The icon was the main shrine of the Boldinsky Trinity Ilya Monastery. A historical and literary analysis of both books showed that both “The Miracles of the Most Holy and Blessed Virgin Mary” and “The Bedewed Fleece” have a certain set of motifs about its miracles and deeds, which puts them on a par with the texts of other legends about miraculous icons. The heyday of this genre occurred in the 17th — early 18th century. The main miracle and the main motif of the legends created by Dimitry Rostovsky is the flow of tears from the icon, which occurred in 1662: the Ilya Icon of the Holy Mother began myrrh-streaming and praying to the Divine Son for the salvation of the entire human race. The remaining miracles describe healings from illnesses and ailments that occur through prayer in front of the icon. However, the composition and style of these books, which reflect new trends and a new style — the Baroque style, differ significantly from the works of this genre. The main difference is that Dimitry Rostovsky inserts additional narratives into the text. He adds moral teachings to the book “Miracles of the Most Holy and Blessed Virgin Mary” and moral teachings, conversations and attachments to the book “The Bedewed Fleece.” They play an important role in the architectonics of the text and carry a significant semantic load, thereby creating a new literary form in the context of the genre of tales about miraculous icons.
Universal Free School Meals Policy and Childhood Obesity
Authors: Localio Anna M. , Knox Melissa A. , Basu Anirban , Lindman Tom , Walkinshaw Lina Pinero , Jones-Smith Jessica C.
Published: March 2024

BACKGROUND AND OBJECTIVES

The Community Eligibility Provision (CEP), a universal free school meals policy, increases school meal participation by allowing schools in low-income areas to provide free breakfast and lunch to all students; however, its impact on obesity remains uncertain. The objective of this study is to estimate the association of CEP with child obesity.

METHODS

School obesity prevalence was calculated using BMI measurements collected annually between 2013 and 2019 from students in California public schools in grades 5, 7, and 9. To estimate the association of CEP with obesity, we used a difference-in-differences approach for staggered policy adoption with an outcome regression model conditional on covariates, weighted by student population size.

RESULTS

The analysis included 3531 CEP-eligible schools using school-level obesity prevalence calculated from 3 546 803 BMI measurements. At baseline, on average, 72% of students identified as Hispanic, 11% identified as white, 7% identified as Black, and 80% were eligible for free or reduced-price meals. Baseline obesity prevalence was 25%. Schools that participated in CEP were associated with a 0.60-percentage-point net decrease in obesity prevalence after policy adoption (95% confidence interval: −1.07 to −0.14 percentage points, P = .01) compared with eligible, nonparticipating schools, corresponding with a 2.4% relative reduction, given baseline prevalence. Meals served increased during this period in CEP-participating schools only.

CONCLUSIONS

In a balanced sample of California schools, CEP participation was associated with a modest net decrease in obesity prevalence compared with eligible, nonparticipating schools. These findings add to the growing literature revealing potential benefits of universal free school meals for children’s well-being.
Concentración de nitrógeno y clorofila en hojas de chile dulce hidropónico en invernadero bajo diferentes estrategias de manejo del riego y la nutrición
Authors: Soto Bravo Freddy , Angulo Guillén María Alejandra
Published: March 2024

Introducción. El nitrógeno (N) es un elemento esencial para el proceso de fotosíntesis, y por tanto, determinante en el rendimiento. El uso de sensores ópticos para determinar índices de transmitancia (SPAD, CCI), reflectancia (NDVI) y fluorescencia (Fv.Fm-1) relacionados con el estado del N foliar, permite un adecuado manejo a partir del monitoreo “in situ” no destructivo. Objetivo. Evaluar el efecto de diferentes estrategias de manejo del fertiriego sobre las concentraciones de nitrógeno y clorofila en hoja; y la relación entre i- concentración de N y de Clorofila (Cl) en hoja, ii- concentración de N y de Cl en hoja con el rendimiento y iii- concentración de N y de Cl en hoja con índices SPAD, CCI, NDVI y Fv.Fm-1. Materiales y métodos. Se evaluaron 6 tratamientos en un diseño irrestricto al azar con arreglo factorial 2 x 3, que combinaron 2 estrategias de riego (E1: bajo volumen y de mayor frecuencia y E2: alto volumen y menor frecuencia) y 3 niveles de nutrición: bajo (NB), medio (NM) y alto (NA). Las medidas directas de N y Cl en hoja se determinaron con el método Kjeldahl y por extracción con etanol, respectivamente. Resultados. El nivel de nutrición afectó el contenido de N, donde los tratamientos NM y NA fueron similares, aunque superiores a NB. El modelo de regresión mostró poca capacidad para estimar N y rendimiento a partir del contenido de Cl en hoja. La estimación de Cl en hoja a partir de los índices CCI (R2: 0,71) y SPAD (R2: 0,75) resultaron prometedores solamente en NB. Para estimar N foliar, la regresión con Fv.Fm-1 mostró valores de R2 de 0,89 en NB y 0,69 en NM; mientras que para NDVI los valores R2 fueron 0,61 en NB y 0,47 en NM.
Respuesta preliminar de la canavalia a la inoculación micorrízica en un ambiente edáfico de Jibacoa
Authors: Ferrás Negrín Yusdel , Rivera Espinosa Ramón , Pérez Salina Vidalina , Sánchez Esmori Ciro
Published: March 2024

Introducción. Canavalia ensiformisampliamente utilizada como abono verde, presenta beneficios comprobados por la inoculación micorrízica. La efectividad de los inoculantes micorrízicos arbusculares utilizados en Cuba dependen de la condición edáfica en que se desarrolla el cultivo; sin embargo, hay pocos resultados experimentales en suelos Cambisol éutrico crómico de Jibacoa. Objetivo. Evaluar en este suelo la respuesta de la canavalia a la aplicación de 3 inoculantes micorrizicos. Materiales y métodos. La investigación se realizó en la Estación Experimental Agro-Forestal de Jibacoa, provincia Villa Clara, Cuba. En un diseño completamente aleatorizado se estudiaron 3 inoculantes formulados con las cepas INCAM2/Funneliformis mosseae, INCAM-4/Glomus cubense e INCAM-11/Rizhophagus irregularis y un control sin inocular. En el momento que floreció la canavalia se evaluó: la cantidad de nódulos efectivos; la altura; la masa seca de la raíz, del tallo, de las hojas, la total y se determinó el índice de eficiencia. Resultados. La canavalia presentó una respuesta positiva y diferenciada a la inoculación micorrízica. La inoculación con INCAM-2 incrementó significativamente la cantidad de nódulos efectivos (21,9%) con valores superiores al tratamiento control y a la inoculación con INCAM-4, además originó la mayor altura con aumentos del 66,1%, superiores (p<0,05) a las encontradas con los otros inoculantes. INCAM-2 siempre provocó valores superiores de masa seca (p<0,01) en cualquiera de los órganos y la total en relación con el tratamiento control, no obstante, no se diferenciaron (p<0,01) a los obtenidos con los otros inoculantes, los cuales no siempre se diferenciaron del tratamiento  control. La respuesta se ordenó de acuerdo con  la masa seca total como sigue: INCAM-2 con 71,90% > INCAM-11 con 50,17% > INCAM-4 con 38,29%.
Potencial forrajero de variedades de maíces costarricenses seleccionadas para grano
Authors: Sánchez Ledezma William , Bonilla Morales Nevio , Hernández Chavez Moisés , Granados Marín Cinthia
Published: March 2024

Introducción. El cultivo de maíz (Zea mays) es ampliamente utilizado en la alimentación animal, tanto en forma de grano, como forraje verde o ensilaje. Objetivo. Evaluar la producción y calidad nutritiva de 6 variedades de maíces costarricenses seleccionados para la producción de grano. Materiales y métodos. El estudio se realizó en 4 sitios experimentales (Aguas Zarcas, Turrialba, San Luis de Monteverde y Guápiles) entre setiembre y diciembre del 2018. En cada sitio, se trabajó con un diseño de bloques completos al azar con 4 repeticiones y 8 tratamientos (6 variedades y 2 híbridos de maíces). Se evaluó la altura de la planta, la producción de materia seca (MS), la composición química y la digestibilidad in vitro de la MS a la cosecha de los forrajes. Resultados. La altura de la planta y la producción de MS fueron afectadas por los tratamientos. Los rendimientos de MS de las variedades costarricenses EJN2, Upiav-G6, Los Diamantes 8843 y JSáenz (12,7-14 t.ha-1) fueron semejantes al híbrido forrajero CLTHY002 (13,5 t.ha-1). Solamente el contenido de MS y PC varío entre los tratamientos. Conclusión. Las variedades de maíces costarricenses EJN2, Los Diamantes 8843, JSáenz y Upiav-G6, tienen potencial para ser utilizadas como fuente forrajera para la alimentación de rumiantes, ya que alcanzaron rendimientos y valores nutritivos semejantes a los obtenidos con los híbridos seleccionados por el Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) para la producción de forrajes.