bluuebunny/crossref_metadata_2025 huggingface dataset:
“Canva Youth Movement” Training to Increase Youth Creativity on Graphic Design
Authors: Ashoumi Hilyah , Hariono Tholib , Widya Anshori Aris , Sirojudin Didin
Published: January 2024

The problem faced by faced by the youth in Pacarpeluk Village is the lack of basic skills in graphic design. basic skills that participants have in graphic design insights, lack of awareness about the lack of awareness of the career opportunities and market value of graphic design, lack of practical opportunities to develop graphic design skills, difficulties in marketing and distributing graphic design work by the youth of Pacarpeluk Village, and difficulties in building a social network or a community that accommodates to be able to support the potential of youth. So it is necessary to hold training to overcome this. The approach method for implementing this community service activity uses the Community Based Research (CBR) method. The stages of implementing the CBR method are identification of community needs, material planning, operational testing and operational assistance. Based on the results of the activities that have been carried out, as follows: Improve the skills of youth on graphic design media and add new insights for youth in graphic design.
A Study on the Case Study of TDABC in Automotive Parts Manufacturers
Authors:   Korean Association Of Computers And Accounting, Kim Tae－Wan , Ha Byeong－Gwon , Kim Tae－Wan
Published: January 2024

[Purpose]If activity－based cost calculation is a cost calculation method that can be applied to blue－chip companies with advanced ERP systems, TDABC is a relatively easy and simple cost calculation method that can be applied even to a small number of SMEs. This study attempted to confirm the usefulness of TDABC by analyzing the difference between the time－active cost calculation (TDABC) method and the existing cost calculation method based on the cost data of S, a case company in the automobile parts manufacturing industry. [Methodology]Unlike the traditional cost calculation of case company S, the process time was calculated by applying the TDABC system by the time equation. Through this, not only the actual operation level was divided into usage time and idle time, but also cost reduction and profit rate improvement measures were prepared by dividing the cost into usage cost and idle cost. [Findings]Summarizing the analysis results of this study, for case companies, the operating margin based on traditional cost calculations was 2.8%, whereas the TDABC system was analyzed as 6.7% of the operating margin for the cost of use, excluding idle costs. In other words, the cost of the TDABC system is a way to increase the operating margin along with the reduction of the idle cost sector. Therefore, it was confirmed that the introduction of the TDABC system for case companies can increase the efficiency of cost management. [implications]Unlike previous studies that calculated the cost incentive rate in the dedicated facility system, this study is significant in that it analyzed the usefulness of TDABC by applying time－driven cost calculation in the multi－species production system because case company S is building a system of general－purpose facilities.
Pemanfaatan Tabung Freon sebagai Komponen Utama Mesin Pemecah Tempurung Kemiri (Aleurites moluccana)
Authors: Lasimpala Iikwanto , Mustofa  , Haluti Siradjuddin
Published: January 2024

Kemiri merupakan salah satu tanaman perkebunan yang kaya akan manfaat dan kegunaan, sehingga berdampak pada tuntutan peningkatan produksi. Peningkatan produksi kemiri dapat diupayakan dengan penerapan teknologi yang didasarkan pada kondisi lingkungan setempat dan ketersediaan bahan baku. Penelitian ini bertujuan untuk menguji kelayakan tabung freon sebagai komponen utama pembuatan mesin pemecah tempurung kemiri. Pembuatan mesin pemecah tempurung kemiri dilakukan melalui beberapa tahapan yaitu identifikasi masalah, penyediaan alat dan bahan, desain alat, pembuatan komponen, fabrikasi komponen, uji fungsi, dan pengujian. Hasil pengujian diperoleh bahwa rata-rata kemiri yang hancur memiliki persentase tertinggi, yakni sebesar 24,17%. Adapun kemiri pecah utuh memiliki persentase terendah, yakni sebesar 1,86%. Selain itu, masih terdapat kemiri yang lolos dan pecah tanpa terkupas. Hasil ini mengindikasikan bahwa kinerja mesin ini kurang maskimal. Oleh karena itu, pengembangan mesin ini perlu dilakukan dengan memperhatikan faktor-faktor yang dapat meningkatkan produktivitas dan kinerjanya.
IDENTIFIKASI GULMA PADA LAHAN APOTEK HIDUP DI SMP NEGERI 6 KOTA TERNATE
Authors: Sabtu Rasmita , Sabtu Nahriza , Sulasmi Sulasmi , Suparman Suparman
Published: January 2024

Gulma merupakan tumbuhan yang berada di sekitar tanaman yang sedang dibudidaya dan dapat mengakibatkan kehilangan hasil secara tidak langsung pada tanaman budidaya selain kehilangan hasil langsung akibat hama dan penyakit tanaman. Untuk mendapatkan hasil yang maksimal dalam pengelolaan tanaman, apotek hidup agar dapat tumbuh dan berkembang dengan baik, maka sebaiknya tanaman apotek hidup dapat tumbuh dengan tidak diganggu oleh tumbuhan gulma yang sering tumbuh di dekat tanaman apotek hidup. Maka tujuan penelitian adalah untuk mengidentifikasi dan mencari tahu jenis gulma apa saja yang tumbuh di lahan tanaman apotek hidup di SMP Negeri 6 Kota Ternate. Metode yang digunakan yaitu metode observasi langsung. Dari hasil penelitian yang telah dilakukan di dapatkan sebanyak 27 spesies gulma yang terdapat di lahan tanaman apotek hidup yang terdiri dari 832 indivifu dan terbagi dalam 3 kelompok gulma. Kelompok gulam berdaun lebar ditemukan dengan jumlah 691 individu (83%), sedangkan gulma rerumputan atau rumput-rumputan yaitu sebanyak 97 tumbuhan (12%) dan gulma jenis teki dengan jumlah 44 individu (5%). Secara umum bahwa gulma daun lebar merupakan gulma dominan yang tumbuh di lahan apotek hidup.
PENERAPAN MODEL PEMBELAJARAN DISCOVERY LEARNING UNTUK MENINGKATKAN HASIL BELAJAR SISWA SMA NEGERI 10 KOTA TERNATE KELAS X PADA MATERI PENCEMARAN LINGKUNGAN
Authors: Ujud Sartika , Nur Taslim D , Yusuf Yusmar , Saibi Ningsi , Ramli Muhammad Riswan
Published: January 2024

Penelitian ini bertujuan untuk mengetahui penerapan model pembelajaran Discovery learning  dalam meningkatkan hasil belajar siswa SMA Negeri 10 Kota Ternate kelas X IPA 3. Metode penelitian yang digunakan adalah penelitian tindakan kelas (PTK) dengan mengunakan dua siklus. Setiap siklus terdapat empat tahap yaitu: (1) perencanaan, (2) pelaksanaan, (3) pengamatan, dan (4) refleksi. Hasil evaluasi peserta didik pada siklus I dari 30 orang, terdapat 14 peserta didik yang memenuhi kriteria ketuntasan Minimal (KKM) atau 47%. Sisanya, peserta didik yang belum memenuhi KKM sebanyak 16 orang atau 53%. Nilai rata-rata siklus I yaitu 70 sedangkan nilai KKM mata pelajaran biologi adalah 72. Hasil evaluasi peserta didik pada siklus II terjadi peningkatan. Peserta didik yang berumlah 30 orang dinyatakan tuntas atau 100% dengan memperoleh nilai rata-rata 80. Hasil observasi aktivitas peserta didik dalam kegiatan belajar mengajar selama siklus I telah tergolong baik, hal ini dapat dilihat dari skor rata-rata yang diperoleh yaitu 69. Dan siklus II mendapatkan hasil observasi aktivitas peserta didik dalam kegiatan belajar mengajar tergolong tinggi dengan perolehan 100%. Hasil aktivitas guru model pada siklus I dan siklus II tergolong lebih baik dalam proses belajar mengajar dengan model pembelajaran Discovery Learning. Hal tersebut dapat dilihat pada aktivitas guru dimana pada siklus I, 71% sedangkan pada siklus II, 100%.
Synthomeida BIOLOGÍA DE Syntomeida melanthus (LEPIDOPTERA: EREBIDAE) EN EL SITIO RAMSAR, HUMEDAL BAHÍA DE PANAMÁ
Authors: Santos-Murgas Alonso , Toribio Erick J. , Cobos-Hernández Rafael M.
Published: January 2024

Con el objetivo de conocer la bioecología de Syntomeida melanthus (Cramer, 1779), en bosques de mangle, Humedal Bahía de Panamá, provincia de Panamá, Juan Díaz, N 9,0121974° E 79,4519785°. Se realizaron cinco transectos lineales perpendiculares al ecotono de la línea costera, cada transecto contenía 250 metros de largo. El monitoreo se realizó 2 veces por mes, durante 25 meses entre 2017 al 2019. Los muestreos fueron hechos de manera aleatoria; se empleó redes entomológicas de golpeo; las colectas se realizaron durante media hora de 9:00 am-12:00 pm. Se determinó e identificó el alcance del desarrollo biológico y ecológico de S. melanthus. A través de crías y observaciones pudimos determinar su ciclo biológico. Se colectaron 1,826 individuos de S. melanthus sobre Avicennia germinans e Ipomoea cairica; el mayor número de muestras de larvas de S. melanthus se colectaron en I. cairica. Entre agosto a septiembre, hay mayor cantidad de larvas de S. melanthus. De enero a julio las observaciones de larvas fueron mínimas, indicándonos que S. melanthus, puede ser un insecto estacional. Se encontró Lespesia archippivora (Riley, 1871) (Diptera: Tachinidae) y moscas Phoridae parasitando los estadios larvales de S. melanthus. Pueden depositar en el envés de las hojas de I. cairica entre 87-96 huevos. El ciclo de vida completo, desde huevo hasta adulto es de +/- 35-38 días. Conclusion, S. melanthus está asociadas a las zonas costeras, no tiene consecuencias severas de herbivoría sobre especies de mangle en la Bahía de Panamá; sin embargo, se encuentra asociada directamente a I. cairica.
Comportamiento de los aditivos naturales en revestimientos de tierra
Authors: Lopez Perez Cecilia Teresa , Lourdes Peralta María
Published: January 2024

Dentro de la arquitectura en tierra, los revestimientos tienen como función proteger el muro de soporte contra los agentes atmosféricos que pueden llegar a afectarlo y degradarlo. Como componentes de la mezcla se usan tierra, estabilizantes, aditivos, aglutinantes y agua. Este artículo presenta los resultados de una investigación cuyo objetivo es caracterizar el comportamiento de los revestimientos en tierra en climas tropicales, con la adición de tres aditivos orgánicos: caseína, melaza y gel de plátano, para su uso como recubrimiento en obras de restauración y en nuevas construcciones. A las mezclas se les realizaron pruebas de campo y de laboratorio como proceso metodológico. Las pruebas de campo fueron realizadas en sitio o a pie de obra, pues no requieren de equipo especializado; las de laboratorio, evaluaron sus características sin aditivos, y luego con los aditivos en tres proporciones determinadas, y se buscó identificar su comportamiento frente a los factores ambientales a los que están expuestos los morteros. De acuerdo con los resultados de los ensayos de compresión, retracción y absorción de agua, se evidencia que los morteros con aditivo melaza se recomiendan para edificaciones nuevas, expuestas a un nivel de lluvia medio. No obstante, el uso del mortero no se recomienda para obras de restauración, ya que se evidenció una mayor pérdida de color en superficie. En cuanto a la contracción lineal, los resultados para los aditivos de gel plátano y caseína sugieren que tendrán poca aparición de fisuras o grietas.
Propiedades hidrológicas del suelo en una microcuenca de Filo del Tallo, Darién
Authors: Pérez Manuel Isaac , Arcia Manuel
Published: January 2024

Panamá es un país con abundantes precipitaciones, sin embargo, los efectos del cambio climático como una sequía prolongada en el año 2023, causó problemas con el suministro de agua para consumo humano y otras actividades como la operación del Canal de Panamá. La Cuenca del Canal de Panamá es monitoreada continuamente y allí se han realizado numerosos estudios. No obstante, son pocos los estudios en otras cuencas. El objetivo de este estudio es determinar las propiedades hidrológicas del suelo en una microcuenca de Darién. Los ensayos se realizaron según la Sociedad Estadounidense de Pruebas y Materiales y con un método reconocido en la literatura tanto para la densidad aparente y la humedad. Por otro lado, se determinó la conductividad hidráulica no saturada mediante un infiltrómetro Mini Disk con una succión de 2 cm. Los resultados reportaron cuatro texturas: franco, franco arenoso, arenoso franco y franco limoso. Además, a lo largo de la microcuenca los suelos de textura fina mostraron un dominio de limo y los cerros de Filo del Tallo exhibieron más material grueso que el área plana de pastoreo. La densidad aparente mínima se encontró en el bosque con 0.77 Mg/m³ y el área de pastoreo reportó valores inferiores a 1.3 Mg/m³. La gravedad específica se encontró entre 2.41 y 2.60, mientras que la humedad en un punto del bosque fue del 30.9% incluso después de dos meses de precipitaciones muy limitadas. Finalmente, la mayor conductividad hidráulica no saturada se encontró en un cerro, con un valor de 8.89 mm/h.
Influence of Carbon Source, Nitrogen and PEG on Caffeic Acid Derivatives Production in Callus Cultures of Echinacea purpurea L.
Authors: TANUR ERKOYUNCU Münüre , YORGANCILAR Mustafa
Published: January 2024

This study aimed to determine the effects of polyethylene glycol (PEG) as an abiotic elicitor and nutritional factors (different ammonium/nitrate ratios, carbon source and amount) in the culture medium on the production of Caffeic Acid Derivatives (CADs) in callus cultures of Echinacea purpurea L. Petiole and root explants were cultured on MS medium modified in terms of different types (sucrose and maltose) and amounts (sucrose 15, 45, 60 g l-1, and maltose 15, 30, 45, 60 g l-1) of carbon source, different concentrations (5, 10, 15 g l-1) of PEG and ammonium nitrate ratios (0:35, 5:25, 15:15, 35:0 mM). The amounts of CADs in the callus obtained at the end of the 10-week culture period were analysed. In both explant types, the highest amount of CADs were obtained from the medium containing 15 g l-1 sucrose and 15 or 30 g l-1 maltose applications, while the highest amount of CADs was obtained in the medium containing 0:35 mM ammonium/nitrate in nitrogen applications. While the highest amount of CADs in root explant was obtained from the medium containing 10 g l-1 PEG applications, CADs content could not be obtained in petiole explant. As a result, the highest amounts of caftaric, chlorogenic, caffeic, and chicoric acids (respectively, 9.38, 0.71, 0.29, and 34.77 mg g-1) were determined at callus obtained from root explant cultured on MS medium containing 30 g l-1 sucrose and 0:35 mM ammonium/nitrate. In conclusion, optimization of culture conditions and different elicitor applications were made to increase secondary metabolite content in E. purpurea L. under in vitro conditions and the results obtained were presented comparatively.
Measuring the Progress of Organic Farming in Indian States: Are there any Agro-climatic Implications?
Authors: KONER Nilojyoti , LAHA Arindam
Published: January 2024

In the quest for a sustainable farming system around the world, organic farming has emerged as the most promising alternative system that can offer solutions to the growing sustainability issues associated with the current input-intensive agriculture system. Organic farming is also becoming increasingly important due to a significant rise in the demand for organic food across the world. Realizing the importance of organic agriculture in the current Indian agricultural scenario, the Government of India has taken several initiatives to promote organic farming across the country. As a result, there has been a considerable increase in different dimensions of organic farming especially in India over the last decade. However, studies have found that organic farming practices in India are more suited to a few specific regions (such as rain-fed zones, low-productivity areas, hills, and arid zones) as compared to the other parts of the country. In this backdrop, this paper attempts to evaluate the state-wise progress of organic farming in India. To measure the inter-state variation in the performance of organic farming, a composite index has been constructed by taking into account four different performance dimensions viz. area covered under organic cultivation, volume of organic production, volume of organic export, and number of producers practicing organic farming. The result suggests a wide disparity in performances in respect of organic farming among the states in India. Interestingly, the states that have performed well in organic farming are found to have a higher level of organic carbon stock in their soil. This shows the influence of agro-climatic conditions on the organic cultivation practices as popularly postulated in the literature.
Carbon and Nitrogen Stocks of Olive Orchard Soils in Izmir Province
Authors: DELİBORAN Aişe
Published: January 2024

Soil organic carbon (SOC) and total nitrogen (TN) have a very important role in sustainable soil quality, crop production, and environmental impacts, and determining of carbon nitrogen ratio (C: N ratio) is very important for creating data banks in terms of ecosystem functions. Plants influence the interaction of SOC and TN, as well as ecosystem yield and the continental carbon cycle. Climate, atmosphere, and land-use change are all included in numerical models of the carbon (C) and nitrogen (N) cycles. This study was conducted to determine the SOC and TN stocks, the C: N ratio and their relationships with the soil properties of olive orchards in Aliaga, Bayindir, Bergama, Dikili, Foca, Karaburun, Kemalpasa, Menderes, Menemen, Odemis, Seferihisar, Selcuk, Tire, Torbali and Urla provinces of Izmir in Turkey. For this purpose, 129 soil samples were taken from 0-30 cm depth. The texture, pH, EC, lime, OM, SOC and TN content and stocks, Bulk density (Db) was determined. Db and C: N ratio varied between 0.84-1.31 g cm-3, 5.17-80.50, and SOC density and stocks changed between 4.00-53.00 mg cm-3, 1.25-1.59 kg m-2, N density and stocks between 0.09-2.66 mg cm-3, 0.03-0.80 kg m-2, respectively. The highest BD was obtained from Tire, the highest SOC stocks from Karaburun, the highest TN from Seferihisar and Karaburun. The very small bulk density which is negatively associated with OM and clay is an important feature. The SOC contents were higher in relatively heavy rainfall regions. SOC and soil texture have a strong relationship. As a result, texture, precipitation, temperature, soil depths, and regeneration of soil affect the SOC and TN stocks. The results may be effective in terms of sustainable soil quality and ecosystem functions for olive cultivation.
In vitro Micropropagation of Immortelle Grass (Helichrysum italicum (ROTH) G. DON)
Authors: UZ İbrahim , SAVALAN Şeyda
Published: January 2024

Immortelle grass (Helichrysum italicum (Roth) G. Don), which spreads in the Southern Marmara and Aegean regions, can be grown in arid and semi-arid regions. In addition, due to its rich essential oil and secondary metabolite content, it has an important place in modern medicine and cosmetics, including traditional treatment methods. Although the propagation of plants by shoot regeneration in vitro has been achieved in many plant species, studies on tissue culture in immortelle grass are limited. This study aims to optimize the tissue culture study in immortelle grass and provide a basis for the next in vitro, molecular, and secondary metabolite studies. In addition, it promotes the plant by optimizing the healthy and disease-free seedling production method for cultural agriculture in the region. Three different (15%, 25%, and 35%) NaOCl concentrations were tested for 10 and 20 minutes during the sterilization phase of the explants. The most successful result was obtained in the medium containing 35% NaOCl for 10 minutes. Sterilized explants were transferred to MS and Gamborg B5 nutrient media containing BAP, GA, and NAA plant growth regulators for shoot regeneration. The best regeneration in explants was obtained in MS medium containing 0.5 mg L-1 BAP, 1 mg L-1 GA, and 0.2 mg L-1 NAA. No growth was observed in trials containing Gamborg B5, and vitrification and darkening occurred in the explants. After four weeks, the shoots reaching a length of 3 cm were taken into MS and ½MS medium containing 0 MS, 0.5 mg L-1 IBA, 1 mg L-1 IBA, 1.5 mg L-1, and 2 mg L-1 IBA as a rooting medium. 100% rooting was observed in all prepared media within four weeks. As a result of micropropagation studies, the rooted plants were transferred to the acclimatization stage within three months and then moved to the pots in the greenhouse and to the field one month later.
Interactions between bacteria and microalgae in microalgal-bacterial symbiotic wastewater treatment systems: mechanisms and influencing factors
Authors: Qi L , Liu X , Gao Y , Yang Q , Wang Z , Zhang N , Su X
Published: January 2024

Microalgal-bacterial symbiotic wastewater treatment systems (MBSWTSs) have received widespread attention due to their capacity to achieve high pollutant removal efficiency during wastewater treatment, with low energy consumption requirements, efficient carbon sequestration, and wastewater resource utilization. This paper provides an overview of the treatment performance and current research status of MBSWTSs, including a detailed summary of the mechanisms of nitrogen, phosphorus, and carbon removal by MBSWTSs and the interactions between bacteria and microalgae. In particular, this review focuses on the influence of operational parameters on the regulation of the symbiotic system, such as the microalgal:bacterial ratio, N:P ratio, external carbon source, dissolved oxygen concentration, aeration mode, and light availability. Among these factors, the microalgal:bacterial ratio, carbon source, and light availability have an important influence on microalgal-bacterial competition, as well as the trophic mode of the system, biomass production, and the capacity for the process to be practically applied on a large scale. MBSWTSs still have some challenging aspects that have hindered their development and application, such as the unknown mechanism of microalgal-bacterial co-metabolism, limited previous practical applications, algal contamination, and harvesting difficulties. To overcome these challenges, future research requires a multidisciplinary approach, incorporating life sciences, material science, and other disciplines. Comprehensive research should be conducted on the metabolic mechanisms of MBSWTSs, the optimization of process performance and waste resource utilization, providing a theoretical and practical foundation for the practical application of MBSWTSs.
Efektivitas Model PBL Berbasis Etnomatematika Terhadap Kemampuan Pemecahan Masalah Matematika Sekolah Dasar
Authors: Andriyanti Bela Widya , Prihastari Ema Butsi
Published: January 2024

Abstrak. Penelitian ini bertujuan untuk mengetahui efektivitas model PBL berbasis etnomatematika terhadap kemampuan pemecahan masalah matematika. Â Penelitian ini menggunakan metode kuantitatif dengan desain One-Group Pretest Posttest. Â Subyek penelitian terdiri dari 29 peserta didik kelas V SD Negeri Wirun 04. Teknik Â sampling Â menggunakan sampling jenuh sehingga sampel dan populasi sama. Teknik pengumpulan data berupa tes, observasi, dan dokumentasi. Â Kelayakan instrumen di uji menggunakan uji validitas dan uji reliabilitas. Analisis data meliputi Â uji normalitas, uji Â paired sample t-test, dan uji n-gain. Â Hasil uji normalitas menyatakan data terdistribusi normal. Hasil uji paired sample t-test diperoleh nilai signifikansi 0,000 Â < 0,05, dan thitung> ttabel (13,792 > 1,701), menunjukkan terdapat perbedaan nilai rata-rata sehingga model PBL berbasis etnomatematika berpengaruh terhadap kemampuan pemecahan masalah matematika. Hasil uji n-gain menunjukkan peningkatan kemampuan pemecahan masalah matematika sebesar 57,2, ditafsirkan cukup efektif. Â Sehingga, disimpulkan bahwa model PBL berbasis etnomatematika cukup efektif terhadap kemampuan pemecahan masalah matematika siswa kelas V SD Negeri Wirun 04.Kata Kunci: Pembelajaran Berbasis Masalah, Etnomatematika, Kemampuan Pemecahan Masalah, Sekolah Dasar.
Analisis Pedagogical Content Knowledge Buku Guru IPAS Muatan IPS SD Kurikulum Merdeka
Authors: Pertiwi Indah Aulia Ayuning , S Revaldhi Athallah , Rustini Tin
Published: January 2024

Abstrak. Pedagogical Content Knowledge merupakan suatu konstruksi akademik yang menggambarkan suatu ide yang dapat membangkitkan minat untuk mempelajari sesuatu (Loughran, 2006). PCK adalah pengetahuan yang dikembangkan oleh guru dari waktu ke waktu dan melalui pengalaman tentang bagaimana mengajarkan konten tertentu dengan cara tertentu untuk meningkatkan pemahaman siswa. Penulisan artikel ini bertujuan untuk mendeskripsikan Pedagogical Content Knowledge terhadap buku guru IPAS kelas IV pada muatan IPS sekolah dasar Kurikulum Merdeka. Persentase Pedagogical Content Knowledge secara keseluruhan yang muncul dalam buku guru IPAS kelas IV adalah sebesar 75% dan tergolong ke dalam kategori tercapai. Berdasarkan temuan ini dapat diketahui bahwa komponen Pedagogical Content Knowledge yang muncul pada buku guru IPAS kelas IV pada muatan IPS sudah cukup baik, meskipun belum maksimal. Meskipun demikian buku guru IPAS kelas IV tetap tidak bisa dijadikan satu-satunya sumber rujukan bagi guru dalam melaksanakan pembelajaran di SD. Guru tetap memerlukan sumber lainnya dalam merancang dan melaksanakan pembelajaran terutama dalam aspek perbedaan perlakuan terhadap siswa.Kata Kunci: Pedagogical Content Knowledge (PCK), IPAS, Kurikulum Merdeka
Validitas Pengembangan LKPD Model Pembelajaran PJBL Kelas V di SDN 02 Silaut
Authors: Khaira Ummul , Firman Firman , Desyandri Desyandri
Published: January 2024

Abstrak. Penelitian ini bertujuan untuk mengetahui validitas pengembangan LKPD dengan model Project Based Learning. Jenis penelitian yang digunakan adalah penelitian pengembangan dengan model penelitian 4-D yaitu define, design, development, dan disseminate. Instrumen penelitian meliputi lembar validasi. LKPD divalidasi oleh satu orang ahli didaktik, isi dan tampilan dan satu orang ahli bahasa. Pada tahap validasi LKPD dengan model project based learning memenuhi kriteria sangat valid dengan persentase rata-rata 80,26 % dengan rincian pada aspek didaktik, isi dan tampilan 78.33 % dan aspek bahasa 87,5 %. Berdasarkan hasil penelitian dapat disimpulkan bahwa LKPD pada materi pengumpulan dan penyajian data menggunakan model pembelajaran project based learning memenuhi kriteria sangat valid dan dapat digunakan sebagai salah satu bahan ajar dalam pembelajaran di Sekolah Dasar.Kata Kunci: Validitas, LKPD, Project Based Learning
Efektivitas Penggunaan Media Pembelajaran Virtual Reality terhadap Hasil Belajar Siswa pada Pembelajaran IPA di SD
Authors: Aini Novita Nur , Azizah Milatul , Bekti Rofi' Setia , Thohir M. Anas
Published: January 2024

Hasil belajar siswa dalam pembelajaran IPA di sekolah dasar dinilai perlu mendapatkan perhatian yang lebih baik, terlebih dalam memenuhi tuntutan abad 21. Penelitian ini bertujuan untuk memberikan rekomendasi media pembelajaran kepada pendidik serta mengetahui efektivitas penggunaan media Virtual Reality (VR) dalam meningkatkan hasil belajar IPA di sekolah dasar. Metode penelitian yang digunakan adalah quasi eksperiment. Sampel diambil dari 2 sekolah yakni SD Negeri Sugihwaras 1 di Kabupaten Jombang dan UPT SD Negeri Tulungrejo 02 di Kabupaten Blitar, sedangkan populasi merupakan sekolah dasar di Jawa Timur. Adapun pengambilan sampel dilakukan dengan teknik purposive sampling. Pengumpulan data dilakukan dengan memberikan pre-test dan post-test kepada kedua kelompok. Hasil data akan dianalisis menggunakan SPSS kemudian diinterpretasikan. Berdasarkan hasil penelitian, diperoleh nilai sig. (2-tailed) sebesar 0,096  >  0,05. Ini berarti penggunaan media VR dalam pembelajaran IPA di SD terbukti efektif diterapkan guna meningkatkan hasil belajar siswa. Angka ini juga dipengaruhi oleh tingginya motivasi belajar kelas eksperimen yang menggunakan VR dari pada kelas kontrol yang diperlakukan pembelajaran secara konvensional.Kata Kunci:Hasil belajarMedia pembelajaranVirtual RealityPembelajaran IPA
Non trivial zeros of the Zeta function using the differential equations
Authors: OUKIL Walid
Published: January 2024

We investigate a relationship between differential equations and the Zeta function. We obtain a more flexible representation of the Riemann Zeta function in the critical strip. This allows us to prove that the Zeta function does not vanish at any point $s\in\mathbb{C}$ such that $\Re(s)\in (0,2^{-1})$.
On the origin of psyche and the nature of its types
Authors: Khudiakov Alexander
Published: January 2024

This study offers a solution to the problem of the origin and nature of psyche, which is the main theoretical problem of psychology and the main obstacle to the solution of the mind-body problem. It also offers an explanation of the nature of types of psyche, directly related to the structure of psyche proposed within the main hypothesis. A holistic concept of the evolution of psyche based on the reflection of the main types of motions - changes of environment, movements of animate subjects and manipulations of objects - consisting of three stages is proposed: 1) The stage of elementary sensory psyche 2) The stage of reflection of behavior 3) The stage of the perceptive psyche The structure of perceptive reflection corresponding to the proposed concept is offered, consisting of four elements: conditions of the environment, phenomena of the environment, properties of objects and behavior of subjects. The connection of the proposed concept with the laws of mechanics of Newton as physical laws describing the psychic reflection of basic types of motions is shown. The correspondence of the proposed concept of the structure of psychic reflection with the key provisions of the typology of Jung is demonstrated. A hypothesis about the nature of the types of psyche as a result of the dominance of certain elements of the structure of the perceptive reflection within the key psychic processes - attention and memory - is proposed.
Group Theoretical Analysis in Modern Physics: Extending Symmetries from SU(2) to SU(5) and Implications in Theoretical Models
Authors: CHEN WEN-XIANG
Published: January 2024

The physical significance of the Weyl group, a reductive group over $\mathbb{F}_1$, is highlighted through several pieces of evidence. Additionally, the work initiated by Arkani-Hamed et al. in 2013, known as the ``amplitudes=combinatorial geometry" program, demonstrates a combinatorial character in calculating amplitudes. This approach notably simplifies the complex and exponentially growing calculations of Feynman diagrams within the $\mathcal{S O}(2)$ framework\cite{1,2}. This paper delves into the intricate application of group theory in theoretical physics, emphasizing the transition of symmetries from SU(2) to SU(5). We begin by examining the foundational properties of the SU(5) group, including aspects such as closure, associativity, identity, inverse elements, and unitarity. This exploration lays the necessary groundwork for applying these principles in advanced theoretical physics.A comparative study of the SO(2) and SO(3) groups is then presented, highlighting the impact of non-removable singularities in 3D spacetime on these groups. This comparison is crucial for understanding the necessity of transitioning from SO(2) to SO(3) or other higher-dimensional SO groups, thereby elucidating the role of group theory in spatial rotations and symmetries within physics.The extension of the Bumblebee Lagrangian from SO(2) to SU(5) symmetry is explored in the final section. This process involves the introduction of additional fields and symmetries to integrate the higher-dimensional structure of the SU(5) group, enhancing the existing model with increased complexity and potential for novel physical interpretations.
Stability in biosensors derived from domain map analysis of bibliometric data
Authors: Klos-Witkowska Aleksandra , Martsenyuk Vasyl
Published: January 2024

In the presented work, advanced methods of analysis and visualization were used to compile trends and patterns in the scientific literature. The most relevant information for the stability of biosensors was selected on the basis of clusters constructed on the basis of keywords. The most significant publications in the clusters appearing over time were analyzed. The most explosive publications were identified, i.e., those that have had the greatest impact on science in the area of the subject under study. The scientific trend in the development of biosensor stability was determined on the basis of the most frequently cited words in recent publications. A map of cooperation and networking between countries in the field of interest of the above topic was presented. Leaders were identified by country of origin.

Systematic Review Registration:https://ubb.edu.pl.
China's transboundary hydropower development at home and abroad: exploring the regulatory interface between international water law and international economic law
Authors: Wouters Patricia , Daza-Clark Ana Maria , Devlaeminck David J.
Published: January 2024

China, located upstream on most of the major transboundary waters shared with vast populations across Asia, is heavily invested in developing hydropower at home and abroad. Some of this hydropower development involves freshwaters that cross national borders raising complex issues in international law, a situation exacerbated by growing economic, environmental, and regional security pressures. In such a context, where conflicts-of-use are almost certain to arise, it is essential to understand the rules that apply so as to enhance opportunities for enhanced transboundary water cooperation. This paper examines the rules of international water law and international economic law that apply to transboundary hydropower development, with a focus on China as one of the key actors in this field. The aim is to examine the regulatory interface of relevant legal frameworks with a focus on China's approach to transboundary hydropower development at home and abroad. While international economic—and more specifically international investment law—is not directly concerned with international water law, host states and foreign investors must be informed, and take into account, the legal obligations governing transboundary waters. China's position as a major water user (at home) and significant investor (abroad) on transboundary waters, makes it a unique case study for exploring the rules of international law that apply in two different regulatory settings. The work examines the rules of law in each of these domains and reveals the inapparent linkages across these seemingly unconnected areas of international regulation.
Non-essential heavy metal effects in cardiovascular diseases: an overview of systematic reviews
Authors: Nucera Saverio , Serra Maria , Caminiti Rosamaria , Ruga Stefano , Passacatini Lucia Carmela , Macrì Roberta , Scarano Federica , Maiuolo Jessica , Bulotta Rosamaria , Mollace Rocco , Bosco Francesca , Guarnieri Lorenza , Oppedisano Francesca , Ilari Sara , Muscoli Carolina , Palma Ernesto , Mollace Vincenzo
Published: January 2024

Introduction

Cardiovascular diseases (CVDs) are the most important cause of premature death and disability worldwide. Environmental degradation and cardiovascular diseases are two keys to health challenges, characterized by a constant evolution in an industrialized world that exploits natural resources regardless of the consequences for health. The etiological risk factors of CVDs are widely known and include dyslipidemia, obesity, diabetes, and chronic cigarette consumption. However, one component that is often underestimated is exposure to heavy metals. The biological perspective explains that different metals play different roles. They are therefore classified into essential heavy metals, which are present in organisms where they perform important vital functions, especially in various physiological processes, or non-essential heavy metals, with a no biological role but, nonetheless, remain in the environment in which they are absorbed. Although both types of metal ions are many times chemically similar and can bind to the same biological ligands, the attention given today to nonessential metals in several eukaryotic species is starting to raise strong concerns due to an exponential increase in their concentrations. The aim of this systematic review was to assess possible correlations between exposure to nonessential heavy metals and increased incidence of cardiovascular disease, reporting the results of studies published in the last 5 years through March 2023.

Methods

The studies includes reviews retrieved from PubMed, Medline, Embase, and Web of Science databases, in accordance with the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) statement and following the PICO (Population Intervention Comparison Outcome Population) framework.

Results

Eight reviews, including a total of 153 studies, were identified. Seven of these review enlighted the association between CVDs and non-essential heavy metals chronic exposure.

Discussion

It is evident that exposure to heavy metals represent a risk factor for CVDs onset. However, further studies are needed to better understand the effects caused by these metals.
Implantable cardiac monitors: artificial intelligence and signal processing reduce remote ECG review workload and preserve arrhythmia detection sensitivity
Authors: Bisignani Giovanni , Cheung Jim W. , Rordorf Roberto , Kutyifa Valentina , Hofer Daniel , Berti Dana , Di Biase Luigi , Martens Eimo , Russo Vincenzo , Vitillo Paolo , Zoutendijk Marlies , Deneke Thomas , Köhler Irina , Schrader Jürgen , Upadhyay Gaurav
Published: January 2024

Introduction

Implantable cardiac monitors (ICMs) provide long-term arrhythmia monitoring, but high rates of false detections increase the review burden. The new “SmartECG” algorithm filters false detections. Using large real-world data sets, we aimed to quantify the reduction in workload and any loss in sensitivity from this new algorithm.

Methods

Patients with a BioMonitor IIIm and any device indication were included from three clinical projects. All subcutaneous ECGs (sECGs) transmitted via remote monitoring were classified by the algorithm as “true” or “false.” We quantified the relative reduction in workload assuming “false” sECGs were ignored. The remote monitoring workload from five hospitals with established remote monitoring routines was evaluated. Loss in sensitivity was estimated by testing a sample of 2000 sECGs against a clinical board of three physicians.

Results

Of our population of 368 patients, 42% had an indication for syncope or pre-syncope and 31% for cryptogenic stroke. Within 418.5 patient-years of follow-up, 143,096 remote monitoring transmissions contained 61,517 sECGs. SmartECG filtered 42.8% of all sECGs as “false,” reducing the number per patient-year from 147 to 84. In five hospitals, nine trained reviewers inspected on average 105 sECGs per working hour. This results in an annual working time per patient of 83 min without SmartECG, and 48 min with SmartECG. The loss of sensitivity is estimated as 2.6%. In the majority of cases where true arrhythmias were rejected, SmartECG classified the same type of arrhythmia as “true” before or within 3 days of the falsely rejected sECG.

Conclusion

SmartECG increases efficiency in long-term arrhythmia monitoring using ICMs. The reduction of workload by SmartECG is meaningful and the risk of missing a relevant arrhythmia due to incorrect filtering by the algorithm is limited.
Dynamic pricing optimization for commercial subcontracting power suppliers engaging demand response considering building virtual energy storage
Authors: Huang Huang , Ning Yifei , Jiang Yunhao , Tang Zhihui , Qian Yong , Zhang Xin
Published: January 2024

Commercial buildings have abundant flexible energy resources for demand response (DR). The electricity price for tenants in the commercial building is generally issued by a subcontracting power supplier (SPS), and the tenants cannot directly interact with the energy retailer. Therefore, the incentive for tenants to participate in DR is insufficient, and their potential is not fully explored. To address these issues, this paper proposes a dynamic pricing method based on the Stackelberg game, helping tenants actively participate in DR. Then, with the optimized energy consumption of the tenants, a virtual energy storage model of the commercial building is constructed by aggregating the adjustable capabilities of flexible energy resources such as air-conditioning (AC) and electric vehicles (EVs) in the public area. Finally, simulation tests are conducted based on a real commercial building to demonstrate the effectiveness of the game-theoretic pricing approach and validate the role of virtual energy storage of the building in DR.
Assessing the effectiveness of national park’s policies and laws in promoting biodiversity conservation and ecological development in Pakistan
Authors: Javeed Banafsha , Huang Delin , Shangguan Donghui , Ahsan Mukhtar Muhammad , Sajjad Wasim , Banerjee Abhishek , Yang Qin , Butt Asim Qayyum
Published: January 2024

Ecological history is crucial in ecosystem restoration, serving as a tool to identify and characterize suitable restoration targets. Pakistan has implemented laws and policies to enhance forest sustainability and preserve biodiversity, as it is becoming a global strategy for future water planning and management. This study seeks to analyze the impact of national park policies and laws on various factors, including biodiversity conservation, ecological processes preservation, water resource protection, consumptive and non-consumptive benefits, research and education, and the promotion of recreation and tourism. To assess the effectiveness of established policies in 19 National Parks in Pakistan, a mixed-mode research design was utilized, combining both quantitative and qualitative approaches. Data was collected from 300 participants through a close-ended questionnaire employing a Likert scale. Analysis of the collected data was conducted using the software Smart Partial Least Squares method. The findings demonstrate that the existing policies and laws have contributed to the preservation of forest sustainability in Pakistan. The policies related to recreation and tourism; consumptive benefits; and research are more effective respectively compared to other sets of regulations. The laws and policies related to preservation of ecological processes are least effective. The study suggests that laws related to national parks need to be revised to preserve biodiversity and ecological processes. The preservation of water resources should be a major concern, and the consumptive benefits of these parks should be rechecked. Awareness campaigns are to be part of the expansionary policy framework, and while tourism opportunities should be created, a check on natural resource misuse should be implemented. The non-consumptive benefits of these parks should also be assessed. Due to its potential limitations, such as limited stakeholder analysis, difficulty in creating legitimacy in national parks due to bureaucratic structures, lack of community sensitization, and long-term trends in sustainable conservation strategies, there are certain future research directions that can address challenges in studying the impact of policies on national park habitats. There is a pressing demand for a more dynamic approach to ecological policymaking. Continuous evaluation and adaptation of policies will be essential in creating an environment conducive to sustainable development.
Recyclable, but not recycled—an indicator to quantify the environmental impacts of plastic waste disposal
Authors: Venkatachalam Venkateshwaran , Spierling Sebastian , Endres Hans-Josef
Published: January 2024

With an exponential increase in the production and consumption of plastic products over the last few years, the predominantly linear (take-make-dispose) economy of the plastic life cycle has captured global attention. Even though plastic products offer versatile benefits with their properties across different sectors, with a global recycling rate of less than 10%, it is challenging to reduce the pollution generated by plastic waste. Also, the loss of resources due to the uncontrolled disposal of plastic waste has been projected to cause long-term negative effects on the environment. To ensure a better circularity of the plastic flows across the world, it is essential to design plastic products that have an adequate infrastructure to recover and recycle the waste no matter where they are used. The polymer manufacturers and the plastics converters must account for the environmental impacts of the resources lost in the environment due to the lack of recycling infrastructure as a part of Extended Producer Responsibility. This study introduces an indicator that accounts for the loss of resources and proposes for a better methodology to quantify the environmental impacts of polymers and plastic products, based on their recyclability and the availability of recycling infrastructure to handle them. By integrating the loss of resources with the environmental impacts of specific polymers used in specific plastic products, the stakeholders across the value chain have the choice to select the polymers and products that are actually recycled, thereby reducing their environmental impacts and increasing the circularity.
Spatiotemporal pattern of landscape ecological risk in the Yangtze River Basin and its influence on NPP
Authors: Jia Lu , Yu Kunxia , Li Zhanbin , Li Peng , Cong Peijuan , Li Binbin
Published: January 2024

The rapid development of the social economy and the continuous change in land use have greatly altered the ecological risk of the regional landscape. This study focused on the Yangtze River Basin in China and aimed to examine the temporal and spatial variation characteristics of landscape ecological risk (LER) over a period of 34 years (1982–2015), after determining the optimal sub-watershed scale. Based on the conditional probability framework, the non-linear response of NPP to LER was revealed. Finally, the primary driving factors of LER were explored, and additional potential causes for changes in NPP were discussed. The study findings indicated that the mean annual LER of the Yangtze River Basin exhibited a spatial distribution characterized by high values observed in the western regions and low values in the eastern regions at the optimal sub-basin scale. Specifically, 30.56 and 22.22% of the sub-basins demonstrated a significant upward and downward trend in annual LER, respectively (P < 0.05). The spatial distribution pattern of the mean annual NPP demonstrated high values in the middle region and low values in the western area, with annual NPP significantly increasing in 94.44% of the sub-basins (P < 0.05). The relationship between annual NPP and annual LER was found to be non-linear, indicating that higher annual LER results in a higher probability of median and high values of annual NPP from the perspective of watershed average. Furthermore, climate factors emerged as the main influencing factor of the NPP. Based on these discoveries, upcoming endeavors should concentrate on optimizing landscape formations and executing a judicious distribution of plant species.