bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mechanical and Postfire Structural Performances of Concrete under Elevated Temperatures
Authors: Murugan Vishal , Bahrami Alireza , Srivastava Rakshit , Satyanarayanan K. S. , Murugan Prakash , Arvind J. S. 
Published: August 2023

This article investigates the mechanical and postfire structural performances of concrete under elevated temperatures (200°C, 400°C, 600°C, and 800°C) after 7 and 28 days of concrete curing. The main objective of this study is to evaluate the post-fire behavior of concrete structures and how their modulus of elasticity values influence their structural parameters. Mechanical studies, namely, the compressive strength, splitting tensile strength, and flexural strength, were performed on cubes, cylinders, and prism beams under normal and elevated temperatures. Non-destructive tests, like rebound hammer and ultrasonic pulse velocity, were also conducted on concrete cubes to obtain the strength of concrete before and after heating the specimens. Microstructural studies, in particular, scanning electron microscope and energy dispersive x-ray spectroscopy, were done to analyze the changes in the chemical composition of concrete under the effect of the temperatures. The weight loss of the concrete specimens was assessed under the elevated temperatures. The results indicated that the geometric shapes of the specimens influenced the loss in the moisture content of concrete under an elevated temperature scenario. Microstructural studies revealed the changes in the chemical composition under the elevated temperatures. The results of this research can be further integrated for industrial applications. Doi: 10.28991/CEJ-2023-09-08-04 Full Text: PDF
Measuring and Rigidity Moduli of GFRP Experimentally
Authors: Awad Youssef A. , El-Fiky Ahmed M. , Hegazy Hosam M. , Hasan Mahmoud G. , Yousef Ibrahim A. , Ebid Ahmed M. , Khalaf Mohamed A. 
Published: August 2023

Although GFRP poles are widely accepted today due to their low cost and weight and high electrical and corrosion resistance, they suffer large deformations due to the low elastic and rigidity moduli (E & G) values of the GFRP. Accordingly, it is essential to accurately measure these values to estimate the actual deformation of the pole. This study presented a procedure to measure (E & G) values using three different tests on three sample sizes: full, scale pole, conic sample, and ad coupon sample, instead of using the manufacturer values as usual. This study is also concerned with the shear modulus value and when it can be neglected as usual in other traditional materials. The GRG optimization technique was used to analyze the results and determine the optimum values for (E & G) considering the results of the three tests. The results showed that the values of (E & G) are greatly affected by the sample’s size and shape, the slenderness ratio of the sample (L/r), and the shear deformation contribution. The critical slenderness ratio (L/r), corresponding to a shear deformation contribution of 10%, was determined for each test. This value is recommended as the upper boundary for any test that measures the (E & G) values. Testing several samples with different (L/r) values is also recommended to enhance accuracy. This study was concerned with determining the optimum values of elastic and rigidity moduli for GRFP poles compared to the manufacturer’s conservative values. The results indicated that the shear modulus can be neglected and the importance of the scale effect on the results of flexure and shear modulus. Doi: 10.28991/CEJ-2023-09-08-07 Full Text: PDF
Antioxidant Activities and α-glucosidase Inhibition of Gayo Arabica Coffee Skin (Coffea arabica L)
Authors: Harahap Baharuddin Yusuf Habiby , Hasim Hasim , Faridah Didah Nur 
Published: August 2023

This research objectives to determine antioxidant activities and inhibition of α-glucosidase 96 % ethanol extract of gayo arabica coffee skin, n-hexane fraction, ethyl acetate fraction, and water fraction. Gayo arabica coffee skin was extracted by ethanol using maceration and fractionation using n-hexane, ethyl acetate, and water. Quercetin and Gallic acid were used as standard to found total flavonoids and phenolics. Test of antioxidant activity using the DPPH method. After being tested the inhibition of the α-glucosidase IC50 ethanol extract, the n-hexane fraction, ethyl acetate fraction, and water fractions. The total flavonoids of 96% ethanol extract, n-hexane fraction, ethyl acetate, and water fraction respectively are 76.74, 99.07, 73.55, 50.24 mg QE/g extract . Total phenolics of 96% ethanol extract, n-hexane fraction, ethyl acetate, and water fraction respectively are respectively 211.85, 136.67, 145.19, 127.41 mg GAE/ g extract. Antioxidants activity of ethanol extract, n-hexane fraction, ethyl acetate fraction, and water fraction are IC50 12.03 ppm, 36.08 ppm, 30.27 ppm, 11.62 ppm. Inhibition activity α-glucosidase enzyme respectively are 588.85 ppm, 341.81 ppm, 591.61 ppm, and 798.78 ppm. These showed that the ethanol extract and water fraction are the best in antioxidants and the ethanol extract and ethyl acetate fraction are the best in inhibiting the α-glucosidase enzyme. These results indicate that gayo arabica coffee skin extract has the potential to be developed as an antidiabetic compound.
Keywords: Antidiabetic, Antioxidant, flavonoids, phenolics, α-glucosidase
Efficiency of PjBL (Project Based Learning) Model Assisted By E-Worksheet on Student Learning Outcomes in Science Subjects
Authors: Aprida Huriyah , Mayarni Mayarni 
Published: August 2023

The objective of this investigation was to evaluate the impact of e-student worksheets and the PjBL (Project Based Learning) paradigm on fifth-grade elementary school students' scientific learning results. A single group pretest-posttest is used in the research's quasi-experimental design. Purposive sampling is used in the sampling process, and Class V A is the experimental class. Research instruments up to 20 multiple-choice questions that have undergone validity and reliability testing. The experimental class has consistent and frequent distribution of data on learning outcomes. The Paired Sample T-test was utilized to analyze the data. The outcomes of the data analysis revealed 0.00. If the Sig level. < 0.05 then 0.00 < 0.05. These findings may lead to the conclusion that project-based learning (PjBL), which is supported by e-worksheets, has an effect on students' learning outcomes in science as Ho is declined and Ha is approved
Analisis Kemampuan Pemecahan Masalah Biologi Materi Perubahan Lingkungan Di Sman 4 Yogyakarta
Authors: Yustisiana Sugma Rizki Tri Utami , Aminatun Tien , Kiswandini Dina Ayu 
Published: August 2023

Ketuntasan belanjar materi biodiversitas di SMA Negeri 4 masih perlu ditingkatkan. Hal ini diidentifikasi dari hasil tes kemampuan pemecahan masalah siswa. Tujuan penelitian ini untuk mengetahui kemampuan memecahkan masalah pada materi biodiversitas siswa kelas X pada materi biodiversitas di SMA Negeri 3 Pangkep. Metode penelitian yang digunakan adalah penelitian deskriptif dengan pendekatan kuantitatif. Pengumpulan data dengan menggunakan tehnik tes berupa tes kemampuan pemecahan masalah dan non tes berupa dokumentasi. Instumen penelitian ini adalah tes kemampuan pemecahan masalah berupa tes esai berbasis konteks wacana. Sampel penelitian dipilih secara purposive sampling, yaitu kelas X sebagai kelas obsevasi dengan proporsi siswa kelas X MIPA tiap rombongan belajar.Hasil penelitian membuktikan bahwa mengidentifikasi masalah sebesar 76,0%, merumuskan masalah 52,0%, menemukan altenatif solusi 78,0%, memilih alternatif solusi 70,0%, kelancaran memecahkan masalah 89,0% dan kaulitas hasil pemecahan masalah 85,0%. Hal ini dapat dilihat dari perolehan presentase hasil tes kemampuan memecahan masalah yang berada pada rentang 61-80% dengan kriteria baik. Sedangkan untuk kategori sangat baik terdapat 11 siswa dengan presentase 47,8%, kategori baik terdapat 8 siswa dengan presentase 34,7%, kategori cukup baik 2 siswa dengan presentase 8,7% begitupun dengan kategori kurang baik 2 siswa dengan presentase 8,7% dan 0% untuk kategori sangat kurang baik yaitu 0 siswa.
Research trends on flipped classrooms of mathematics creative thinking, critical thinking, and problem-solving skills
Authors: Fayakuun Muhammad , Agoestanto Arief 
Published: August 2023

Some studies discussed learning outcomes, challenges, and the effect of media learning on flipped classrooms of mathematics creative thinking (MCeT), critical thinking (MCiT), and problem-solving (MPS) skills. None of the studies reviewed the research information. This study aimed to examine trend research by year and the diversity of research methods, quantitative research designs, research subjects, mathematics topics, research variables, data collection tools, test designs, data analysis methods, and learning media in articles published in Scopus, Education Resources Information Centre (ERIC), and Garba Rujukan Digital (Garuda) databases of mathematics educational journals from January 2018 to April 2023. The method of this study was the content analysis method. Twenty-two articles were evaluated in this study. The results showed that the research trend by year was increasing. The most type of research methods, quantitative research design, research subjects, mathematics topic, research variables, data collecting tools, kind of test design, data analysis techniques, and learning media were quasi-experimental design, eighth-grade junior high school students, three-dimensional shape, problem-solving, test sheet, pretest-posttest, t-test, and video, respectively. This study gave insights to other researchers for future decision-making on flipped classrooms of MCeT, MCiT, and MPS skills.
Faktor yang Mempengaruhi Penggunaan Metode Kontrasepsi Implant terhadap Minat Ibu
Authors: Jamuddin Fatimah , Fitriani Fitriani , Sulaeman Sulaeman , Sulaeman Sulaeman 
Published: August 2023

ABSTRACT
The population problem is a problem faced by all countries, both in developed and developing countries, including Indonesia. This can be seen from the very rapid growth in world population with a high growth rate. To reduce the rate of population growth. Mother's interest in using contraception is influenced by several factors, including knowledge, education, affordability of health services, husband's support. This type of research used a cross sectional study with a non-probability sampling technique with a purpposive sampling type of 46 samples that met the inclusion criteria. Data collection techniques are primary data by direct observation of respondents and questionnaires as an instrument using an observation approach. Data analysis used a questionnaire validity and reliability test, univariate and bivariate analysis. The results obtained from 46 respondents, 30 (65%) respondents with good interest and 16 (35%) respondents with less interest. There were 36(78.2%) respondents who were first users of implants and 10(21.8) were repeat users. 35 (76%) respondents with good knowledge and 11 (24%) with less knowledge. Based on education, there were 29 (63%) with higher education and 17 (37%) with lower education. Based on bivariate analysis using statistical tests, there is a significant relationship between maternal interest and implant contraceptive users, with a significance value (P) = 0.009 where P <0.05. there is a significant relationship between mother's interest and knowledge with a significance value (P) = 0.021 where P <0.05. There is a significant relationship between mother's interest in education, with a significance value (P): 0.000 where P <0.05
PERBANDINGAN RAB ANTARA PEKERJAAN DINDING MENGGUNAKAN FEROSEMEN DAN BATAKO PADA REHABILITASI RUMAH SEDERHANA
Authors: Sadilah Ikhsan , Widaryanto Lilik Hendro , Shulham M Afif 
Published: August 2023

Perbandingan rencana anggaran biaya bangunan (RAB) pada program PUPR yaitu Bantuan Stimulan Rumah Swadaya (BSPS) atau bisa disebut rehabilitasi rumah sederhana. Dengan metode penelitian menggunakan analisis kuantitatif yang disajikan dan di berikan pembahasan menggunakan tabel dan data dari pembangunan rehabilitasi rumah sederhana pada bangunan ukuran keliling 22 meter dan tinggi 3 meter. Rencana anggaran biaya bangunan (RAB) pekerjaan rehabilitasi rumah sederhana di lakukan dengan dua cara yaitu perbaikan dengan mengganti struktur dinding baru atau memperkuat dinding dengan metode ferosemen. Sehingga hasil rencana anggran biaya dari ke dua pekerjaan perbaikan tersebut apakah ada selisih atau tidaknya. Hasil yang didapat dari analisis yang di lakukan pada Rencana Anggaran Biaya bangunan (RAB) pekerjaan rehabilitasi rumah sederhana dengan menggunakan batako adalah Rp. 11.144.000,00 sementara dengan ferosemen adalah Rp. 9.329.500,00. Sehingga di dapat selisih Rp.1.818.500,00 dengan rehabilitasi menggunakan batako biaya lebih besar dibandingkan dengan menggunakan ferosemen.
Effectiveness of Hydroson Therapy (Hydrotherapy and Benson) and Dhikr Relaxation Therapy on Hemodynamic Function in the Elderly
Authors: Damayanti Santi , Nekada Cornelia Dede Yoshima 
Published: August 2023

Background: The most common Non-communicable Diseases found in the elderly. Complementary therapy as a support for medical therapy is needed during a pandemic like today. Hydrotherapy soaked feet makes blood circulation smooth, Benson's relaxation and dhikr produce a relaxed condition so that it can increase endorphins hormones, increase vascular vasodilation and lower blood pressure, improve pulse rate and oxygen saturation
Purpose :you knoweffectivenesshydroson therapy and dhikr relaxation therapy on hemodynamic function in the elderly.
method: Type of quasi-experimental research with pre and post test design without control design, the sample size is 38 elderly who are Muslim and suffer from hypertension. Bivariate data analysis with Wilcoxon and paired T-test.
Results :there was a difference in systolic blood pressure before and after being given hydrotherapy and Benson intervention with dhikr with a P value of 0.000. There was a difference in diastolic blood pressure before and after being given hydrotherapy and Benson's intervention with dhikr with a P value of 0.032. There was no difference in pulse frequency before and after being given the hydrotherapy and Benson interventions with dhikr with a P value of 0.221. There are differences in oxygen saturation before and after hydrotherapy and Benson intervention with dhikr with a P value of 0.004
Conclusion:Hydroson therapy and dhikr relaxation therapy are effective for hemodynamic function in the form of lowering blood pressure and increasing oxygen saturation in the elderly. But it has no effect on pulse frequency.
Effect of Quadriceps Set and Manual Traction on Pain in Osteoarthritis
Authors: Wijianto W. , Habibah Maryam 
Published: August 2023

Background: Osteoarthritis (OA) is a joint disorder in which progressive loss of articular cartilage occurs and can lead to disability. The most common symptom of osteoarthritis is pain. Usually the pain is exacerbated by use of the joint and relieved by rest. treatment is only aimed at relieving pain, maintaining or increasing mobility, minimizing disability, and improving quality of life.
Objective: To determine the effect of quadriceps sets and manual traction on pain in knee osteoarthritis. Methods: This study used a pre-experimental method with a one group pretest and posttest design. Pain measurement was performed using a visual analogue scale (VAS). The data normality analysis test will use Shapiro Wilk while the bivariate analysis uses the paired sample t test, and the multivariate analysis uses a linear regression test.
Results: The results obtained from this study, there was a significant effect of manual traction and quadriceps sets on pain p=0.000 (p <0.05) and there was no significant relationship between changes in pain with age (p=0.266) and BMI (p=0.241).
Conclusion: There is an effect of giving quadriceps sets and manual traction on the incidence of reducing pain in knee osteoarthritis.
Democracy, Procedural and Social Rights, and Constitutional Courts in Hungary and Slovakia
Authors: Steuer Max 
Published: August 2023

In democracies, individuals are free to develop their own conceptions of values, and try to persuade others of their viability. However, some of these conceptions carry greater weight than others. In particular, centralized constitutional courts (CCs) authoritatively interpret fundamental values as they are typically entrusted by constitutions to do so. This article introduces a new approach to examine how CCs advance particular value conceptions, via scrutinizing the understandings of procedural rights and social rights by the two formally most powerful in Central Europe: the Hungarian (HCC) and the Slovak (SCC) Constitutional Court. While procedural rights capture the minimum standards of equal treatment, social rights signal more robust readings of democracy which raise expectations of improved well-being. The two jurisdictions offer windows into the working of CCs operating in regimes with a history of authoritarianism—whereas Slovakia is currently a fragile democracy at best, Hungary has regressed into an illiberal regime. The article makes use of new institutionalism, where ideas articulated in the CCs’ case law have a potential to influence the political regimes the CCs are located in. Using a case selection method based on keyword search, its two case studies, covering the period between the 1990s and 2017 and 77 majority opinions show how the SCC seldomly connected procedural and substantive rights to democracy, but this went unnoticed in the broader public. For the HCC, however, the absence of the connections between democracy and justice, especially when interpreting social rights, appears to have contributed to its image as distant from the public, locked in abstract legal discourses. The findings prompt questions about the impact of public perceptions of the CCs on the capacity of actors with authoritarian ambitions to launch successful assaults on the CCs, as well as on the potential of the CCs to prevent these assaults by articulating particular value conceptions.
Rethinking Amnesties and the Function of the Domestic Judge
Authors: Vagias Michail 
Published: August 2023

The award of amnesties or pardons has been used time and again to facilitate the attainment of peace after a civil war. However, this practice has been condemned by human rights and other international bodies as incompatible with the duty of states under human rights law to investigate, prosecute and punish human rights violations and the victims’ rights of access to justice and to the truth. Due to this incompatibility, the function of the domestic (constitutional) judge is none other than to strike down amnesty legislation as null and void. This appears to be the prevailing narrative in contemporary human rights discourse. The present contribution takes issue with this narrative. It takes the position that the international effect of regional human rights jurisprudencehas been to condition, as opposed to wholesale outlaw, the use of amnesties as a post-conflict peace-building tool. It defends the view that while blanket amnesties are increasingly considered incompatible with victims’ rights today, that does not mean that all amnesties are prohibited. From this perspective, this article argues that the proper function of domestic constitutional courts in the performance of the constitutionality control of amnesty legislation should take a different shape; instead of querying whether to strike down or to uphold amnesty legislation in its entirety, Constitutional Courts should condition amnesties to criteria – such as their position as part of a broader transitional justice package including truth telling and compensation – and monitor their implementation on a case-by-case basis.
Inovasi Pemerintah Daerah: Aplikasi Siapp Sebagai Dukungan Smart City Di Kabupaten Kendal
Authors: Rahmawati Maulida Putri , Fatchuriza Muhammad 
Published: August 2023

Era digital saat ini membutuhkan layanan informasi yang cepat, tepat dan akurat. Pelayanan darurat yang langsung terintegrasi oleh instansi terakit menjadi kebutuhan publik. Inovasi harus dilakukan oleh pemerintah untuk memenuhi kebutuhan saat ini. Smart city merupakan penerapan konsep, dengan memanfaatkan teknologi untuk mencapai pelayanan publik yang baik. Pemerintah Kabupaten Kendal merupakan salah satu pemerintah daerah yang inovatif. Pemerintah Kabupaten Kendal membuat sistem pengaduan ketertiban dan ketentraman masyarakat serta proteksi kebakaran yang berbasis teknologi yang diberi nama SIAPP (Sistem Integrasi Aduan Pamong Praja). Metode yang digunakan dalam penelitian adalah studi kepustakaan melalui data sekunder. Tujuan dari penelitian ini adalah bertujuan untuk mengetahui penerapan Smart city dalam aplikasi SIAPP dengan memanfaatkan teknologi informasi dan komunikasi dan menjadi salah satu daerah yang telah menjalankan salah satu syarat agar menjadi Good Governance. Kemudian juga menjelaskan bagaimana aplikasi SIAPP pada pilar Smart City yang yakni Smart Environtment, Smart People dan Smart Governanace. SIAPP yang berbasis teknologi diharapkan dapat mengintegrasi peran masyarakat dengan pemerintah melalui pelayanan yang bersifat darurat maupun keluhan aduan yang bersifat ketertiban umum dan kenyamanan.
Lösungen für den Wald-Wild-Konflikt
Authors: Abt Thomas 
Published: August 2023

Abstract
Der Konflikt rund um die Waldverjüngung und gesunde, tragbare Wildtierbestände ist uralt. Dieses Essay fokussiert auf Gemeinsamkeiten und zeigt, wie institutionelle Veränderungen den Boden für tragbare Lösungen ebnen können.
Gutachtliche Beurteilung des Wildeinflusses auf die Waldverjüngung unter Einbezug des Klimawandels
Authors: Zürcher-Gasser Nora , Frehner Monika , Burger Thomas , Zürcher Samuel , Jenal Corsin , Kupferschmid Andrea Doris 
Published: August 2023

Abstract
Die Baumverjüngung ist entscheidend für die Zusammensetzung der zukünftigen Wälder. Wildlebende Huftiere können durch Verbiss, Schälen und Fegen langfristig zu Veränderungen in der Artenzusammensetzung und zu einer Stammzahlreduktion führen. Der Wildeinfluss soll also auch im Hinblick auf jene Baumarten beurteilt werden, die angesichts des Klimawandels am untersuchten Standort zukunftsfähig sind. Im vorliegenden Artikel wird ein Vorgehen beschrieben, mit dem in gutachtlichen Wildeinflussbeurteilungen die Zukunftsfähigkeit der Baumarten objektiv und adäquat berücksichtigt werden kann. Basierend auf Baumartenempfehlungen (z.B. aus der TreeApp) werden dabei Baumarten ausgewählt und in empfindliche und unempfindliche Schlüsselbaumarten und übrige Baumarten unterteilt. Anhand dieses Baumartensets wird anschliessend die Wildeinflussstufe bestimmt.
Monetäre Bewertung von Wildschäden im Schutzwald – Fazit aus sechs Fallbeispielen
Authors: Zürcher-Gasser Nora , Moos Christine , Frehner Monika , Schwarz Massimiliano , Vanoni Marco 
Published: August 2023

Abstract
In Berggebieten hat der Schutzwald eine grosse Bedeutung für Siedlungen und Verkehrswege. Gleichzeitig bieten die Gebirgswälder Lebensraum für Wildhuftiere, die sich unter anderem von Trieben und Knospen junger Bäume ernähren. In Schutzwäldern können durch Wildverbiss verursachte Verjüngungsprobleme erhebliche finanzielle Konsequenzen nach sich ziehen. Da der Verbiss heute passiert, der Schaden aufgrund fehlender Verjüngung aber erst viel später auftritt, ist es herausfordernd, diesen zu beziffern. Im vorliegenden Artikel wird anhand von sechs Fallbeispielen aus dem Kanton Graubünden aufgezeigt, wie wildhuftierbedingte Verjüngungsprobleme im Schutzwald monetär bewertet werden können. In alten Beständen, in denen die Konsequenzen von langanhaltend hohem Verbissdruck bereits spürbar sind oder zumindest in absehbarer Zeit spürbar werden, sind diese gut abschätzbar und sollten als Argument in der politischen Diskussion um das Wald-Wild-Thema verstärkt verwendet werden. In gut strukturierten Wäldern, in denen heutige Verjüngungsprobleme erst in weiter Zukunft spürbar werden, ist es kaum möglich, die Auswirkungen monetär ganzheitlich zu bewerten. Hier sollten Entscheide keinesfalls nur aufgrund von Kosten-Nutzen-Überlegungen, sondern auch unter Einbezug des Vorsorgeprinzips gefällt werden.