bluuebunny/crossref_metadata_2025_split huggingface dataset:
Characterization of Acid Activation of Bentonite Clay of Hada, Afar, Ethiopia
Authors: Berhe Goitom Gebreyohannes , Berhe Mulubrhan Tsegabruk , Cheru Mulugeta Sisay , Weldehans Mebrhatom Gebresemaeti 
Published: April 2023

Abstract
The applications of various clay minerals are related to their structural, physical and chemical characteristics. The physical and chemical properties of the clay minerals dictate their utilization in the industries and beneficiation required before usage. The study aimed at establishing the potentiality of acid activated clay mineral from Hadar, Afar, Ethiopia. XRD, SEM, EDXRF and FT-IR spectroscopies were employed to characterize the chemical compositions and interaction in the bentonite samples. The XRD results revealed that the native and activated bentonite clay contains similar minerals, such as; Montmorillonite [(Ca, Na) 0.33 (Al, Mg)2(Si4O10)(OH)2.nH2O], Quartz [SiO2], albite [NaAl2SiO6], zeolite [CaAl2O3.SiO2.nH2O], and aluminum silicate. Thus, attributes the bentonite clay was composed of SiO2 and Al2O3 indicating that it is an aluminosilicate mineral and the morphology of bentonite was supported by SEM. The chemical analysis by EDXRF revealed that the native bentonite consists of 58.18wt% (SiO2), 14.28 wt% (Al2O3) and Na2O > CaO are the major constituents of the clay with other oxides present in low amount. There was an increase in SiO2 content in activated bentonites, the Al2O3, Fe2O3, and MgO content have decreased by 48.56%, 66.36%, and 84.42%, respectively. The FTIR specta bands at 1627cm–1, and 1027cm−1 were attributed to Al-Mg-OH, Al-Al-OH, and Al-OH-O-Si stretching vibration and the reduction of the content of the octahedral cations is accompanied by a decrease of both OH bending vibrations at 1627 and 3401 cm−1. The FT-IR result is in clear agreement with the SEM, XRD and EDXRF studies which indicate sequential degradation of the clay sheet upon acid treatment. hence rendering the activated bentonite clay have accounted for their demand for different industrial applications such as; its use as detoxifier, sealant, binder, fillers for paper, pharmaceutical products, absorbent, adsorbent, catalyst, nanoclays, et.
Developing policy-making for maximizing the water productivity in agricultural lands
Authors: Fang Jiangtao , Tang Liyuan 
Published: April 2023

Abstract
Soil moisture content improvement is a key process in agricultural production and food security in arid and semi-arid regions. The interaction effect of crop water requirement (CWR) and soil texture on water productivity was evaluated in Harbin, Heilongjiang province, China. A field experiment with two scenarios of compost application (0, 25 ton/ha) and three levels of irrigation policies (deficit irrigation (DI = 0.75CWR), regular irrigation (RI = CWR), and full irrigation (FI = 1.25CWR)) was planned in three replications during 2021–2022. Water productivity was simulated as a criterion to improve the irrigation time for increasing the final biomass. Four strategic crops including potato, corn, wheat, and barley were incorporated into the daily simulation system. Furthermore, a machine-learning random forest algorithm was used to find the best irrigation times. The results showed that the use of adjusted irrigation time and improved soil texture can increase water productivity by reducing evaporation and deep percolation and increasing actual biomass. Estimation of irrigation time in a learning-based method will be optimal when plant growth and soil moisture are monitored on a daily basis.
Diversidade e abundância da entomofauna associada a Triplaris surinamensis Cham (Polygonaceae) em fragmento de floresta secundária, Amazônia Oriental
Authors: Lucas Lázaro Cirineu Santos  , Jaqueline Araújo da Silva  , Luana Drago de Souza  , Brenda Natálya Matni Santos Rosa  , Wagner Rocha do Nascimento  , Telma Fátima Vieira Batista  
Published: April 2023

Os insetos são agentes primordiais para as florestas, pois são responsáveis por importantes processos ecológicos. Objetivou-se estudar a diversidade e a abundância da comunidade de insetos associados ao tachi-da-várzea Trilparis surinamensis na Universidade Federal Rural da Amazônia (Ufra), estado do Pará. A pesquisa foi desenvolvida em um fragmento de floresta secundária no Instituto de Ciências Agrárias na Ufra, campus sede, em fevereiro de 2017, período chuvoso amazônico. Os insetos foram coletados usando-se 10 armadilhas tipo pitfall traps, acopladas à região do caule da planta, durante 7 dias, no inverno amazônico. Coletaram-se 65 indivíduos pertencentes às seguintes famílias: Scolytidae (26), Phoridae (10), Formicidade (9), Agromyzidae (8), Nitidulidae (5), Castiniidae (4), Curculionidae (2) e Largidae (1). Os valores do Índice de Diversidade de Shannon e a Equitabilidade de Pielou encontrados para este estudo foram iguais a 1,73 e 0,83, respectivamente, considerados baixos. A família Scolytidae apresentou a maior abundância, com 40% dos indivíduos coletados, e foi caracterizada como dominante.
Palavras-chave: biodiversidade; insetos; tachi-preto-da-várzea.
Qualidade de vida em idosos com doença coronariana: análise comparativa entre diabéticos e não diabéticos
Authors: Ferreira Esmeralci , Gonçalves de Medeiros Bruno , De Miranda Rocha Marina , Gomes Cavalcanti de Oliveira Carolina , Marques dos Santos Sara Cristine , Picone Borges de Aragão Ivana , Cavalcanti de Oliveira Dinaldo 
Published: April 2023

O diabetes mellitus (DM) afeta mais de 150 milhões de indivíduos, podendo atingir 5.4% da população em 2025. Nos diabéticos, fatores aterotrombóticos e pró-inflamatórios contribuem para disfunção endotelial, aterosclerose e doença arterial coronariana (DAC). O DM e a DAC trazem impactos negativos na qualidade de vida (QV), sendo mais acentuados nos idosos, todavia os aspectos envolvidos não são claramente conhecidos. O objetivo desse estudo foi avaliar se idosos, com DAC e DM (Grupo I), apresentam a mesma QV que os idosos com DAC mas não diabéticos (Grupo II). Estudo prospectivo, transversal e multicêntrico, (janeiro de 2017 até dezembro de 2019). Foram 502 pacientes com DAC em idosos, sendo 190 diabéticos (69 ± 5,6 anos) e 312 não diabéticos (68 ± 4,3) submetidos ao questionário short form (SF36) para análise da QV, com coleta de dados clínicos, sociais e econômicos. Entre as comorbidades, a taxa de AVC foi maior nos diabéticos (34(18%) vs 31(10%); p=0,02). Entre os grupos, não houve diferença no sexo masculino, HAS, dislipidemia, infarto prévio e tabagismo. Capacidade funcional, aspectos físicos, dor e aspectos emocionais não foram diferentes entre os grupos. O estado geral de saúde (52 vs 60; p <0,001), vitalidade (55 vs 60; p<=0,006), aspectos sociais (62 vs 75; p=0,04) e a saúde mental (60 vs 68 p= 0,005) foram significativamente inferiores nos pacientes diabéticos. Conclusões: A avaliação comparativa entre grupos mostrou que DAC nos idosos diabéticos apresenta pior QV. DAC em idosos mostram QV não satisfatória nos dois grupos, mesmo não DM.
UPAYA PENGENDALIAN GERUSAN DI SEKITAR ABUTMEN JEMBATAN
Authors: Sudiyono AD Lutjito 
Published: April 2023

The research aims to know the influence of abutment cover on scouring process, depth and change of bedconfiguration around abutment. The research is carried out by experiment in hydraulic laboratory of civil andplanning departement at Yogyakarta state university. Esperiments are conducted for three point of abutment andthree different distance of the abutment, namely 0,25 h, 0,5 h and 0,75 h. The result showed that using coverplate can decrease scour depth efectively at the upstream of abutment (A), middle of abutment (B) and thedownstream of abutment (C). The result showed a maximum efficiency of 63,3 % in scour reduction for 0,25 hlong distance of cover plate for point A, 35 % and 50 % in scour reduction for 0,75 h for point B and point C .The expereiment show that using double plate cover where distance 0,75 h is more efective than 0,25 h and0,5 h.Keywords: abutment, scouring, cover plate Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan plat pelindung abutmen terhadap prosesgerusan, kedalaman gerusan dan perubahan konfigurasi dasar di sekitar abutmen jembatan. Penelitian inidilakukan di laboratorium Hidrolika Jurusan Pendidikan Teknik Sipil dan Perencanaan Fakultas TeknikUniversitas Negeri Yogyakarta. Percobaan dilakukann untuk 3 posisi plat dari abutmen masing dan dengan 3jmacam jarakmasing-masing 0,25 h, 0,5 h dan 0,75 h. Hasil penelitian menunjukkan bahwa penggunaan platpelindung mampu menurunkan kedalaman gerusan secara efektif pada bagian hulu, tengah dan hilir abutmen.Hasil penelitian menunjukkan bahwa efisiensi gerusan maksimum terjadi sebesar 63,3 % untuk jarak plat 0,25 huntuk titik A, 35 % dan 50 % pada jarak plat 0,75 h untuk titik B dan titik C . Hasil pengujian jugamenunjukkan bahwa penggunaan plat ganda dengan jarak 0,75 h lebih efektif daripada pada jarak plat 0,25 hand 0,5 h.
STUDI PERBANDINGAN BIAYA PER 1 M2 PEKERJAAN PASANGAN DINDING BATA RINGAN DENGAN PASANGAN BATA MERAH
Authors: Prapto Pusoko , Haryadi Bada 
Published: April 2023

ABSTRACTThis study aims to determine the comparison of time and installation cost of each m2 wall of MU adhesive brick with red brick mixture of 1 Pc: 5 Ps in Sleman DIY in 2016. This research uses experimental approach. The place of research is carried out in Bengkel Batu Department of Civil Engineering Education and Planning Faculty of Engineering UNY. The sample in this study was taken as much as 3 pieces of work pair with ukurang long pair 2 meters and 1 meter height for each pair of hebel and brick. The data of the research are analyzed descriptively with comparative approach. The result of this study is the comparison in terms of installation time per m2 wall of MU adhesive lightweight brick 1.7 times faster than the red brick pairs with a mixture of 1 PC: 5 PS (1.7: 1), the installation cost per m2 of wall from Lightweight brick with MU adhesive Rp 92.100,00 while brick Rp 60.146,00.Keywords: brick, hebel, wall ABSTRAKPenelitian ini bertujuan untuk mengetahui perbandingan dari segi waktu dan biaya pemasangan tiap m2 dinding dari bata ringan perekat MU dengan bata merah campuran 1 Pc : 5 Ps di Kabupaten Sleman DIY tahun 2016. Penelitian ini menggunakan pendekatan eksperimen. Tempat penelitian dilaksanakan di Bengkel Batu Jurusan Pendidikan Teknik Sipil dan Perencanaan Fakultas Teknik UNY. Sampel dalam penelitian ini diambil sebanyak 3 buah pekerjaan pasangan dengan ukurang panjang pasangan 2 meter dan tinggi 1 meter untuk tiap pasangan hebel dan batu bata. Data hasil penelitian dianalisis secara deskriptif dengan pendekatan komparatif. Hasil dari penelitian ini adalah perbandingan dari segi waktu pemasangan tiap m2 dinding dari bata ringan perekat MU 1,7 kali lebih cepat dibandingkan dengan pasangan bata merah dengan campuran 1 PC : 5 PS (1,7 : 1), biaya pemasangan tiap m2 dinding dari bata ringan dengan perekat MU sebesar Rp 92.100,00 sedangkan batu bata Rp 60.146,00. Kata kunci: batu bata, hebel, pasangan dinding
PERILAKU SAMBUNGAN SAYAP MENERUS BALOK PROFIL I DENGAN KOLOM TABUNG BAJA AKIBAT BEBAN SIKLIK
Authors: Riyanto Eko , Muslikh Muslikh , Supriyadi Bambang 
Published: April 2023

ABSTRACTUsing Concrete-Filled Steel Tube (CSFT) as a column component provides many advantages over steel columns. Steel tube serve as reinforcement as well as formwork for concrete filler increases the strength column. The lack of experience and complexity of the beam-column connection system becomes an obstacle to use the CFST as a column. In addition, strength and stiffness of the connection system should be sufficient to endure the earthquake loads. in this research, continuous joint of beam-CFST and continuous joint of beam-column steel tube without concrete filler (BKS-K). Load cycle of specimen refer to ACI 374.1-05. The test results showed the average load of 23,85 kN on BKS-K increased to 26.05 kN on BKS-T. Elastic stiffness (Ke) at BKS-K of 0,531 kN/mm increased to 0,531 kN/mm on BKS-T. BKS-T also has a larger hysteretic loop than BKS-K. BKS-K and BKS-T adequate the strong column weak beam criteria with partial ductility. Keywords: CFST, beam-column joint, cyclic test. ABSTRAKPenggunaan kolom tabung baja dengan isian beton memberikan banyak keuntungan dibandingkan dengan kolom biasa. Adanya isian beton pada tabung baja, kuat tekan terhadap gaya aksial meningkat. Selain itu sambungan harus memiliki kekuatan menahan beban gempa. Kajian ini bertujuan mengetahui perilaku histeristis, kekuatan, kekakuan dan pola keruntuhan dalam menahan beban siklik. Kajian ini dibuat benda uji sambungan sayap menerus balok-kolom tabung baja dengan isian beton (BKS-T) dan sambungan sayap menerus balok-kolom tabung baja tanpa isian beton (BKS-K). Benda uji dibebani dengan siklus beban yang mengacu pada ACI 374.1-05. Hasil pengujian menunjukkan beban maksimum rata-rata sebesar 23,85 kN pada BKS-K meningkat menjadi 26,05 kN pada BKS-T. Kekakuan elastis (Ke) pada BKS-K sebesar 0,531 kN/mm meningkat menjadi 0,737 kN/mm pada BKS-T. Benda uji BKS-T juga memiliki hysteretic loop yang lebih besar dari BKS-K. Benda uji BKS-K dan BKS-T mengalami kegagalan yang memenuhi kriteria strong column weak beam dengan daktilitas parsial.Kata kunci: CFST, sambungan balok-kolom, uji siklik.
PERENCANAAN JEMBATAN PEJALAN KAKI MENGGUNAKAN KAYU JATI HUTAN RAKYAT SEBAGAI MATERIAL KONSTRUKSI
Authors: Nugroho Maris Setyo , Awaludin Ali , Supriyadi Bambang 
Published: April 2023

ABSTRACT Eco-friendly bridge planning is an important aspect to be considered, as the issue of global warming and energy crisis develop. This study examine the planning of pedestrian bridge using community forest wood materials. The analysis is done by 3D modeling on SAP2000 auxiliary software. The research stages consist of testing mechanical properties of wood and optimization of the maximum span of the bridge. The result of testing of mechanical properties obtained result that teak wood of Blora comunity forest have value of Emin 5757 MPa. Based on SNI-7973: 2013 the value is included in the E11 quality code. The design of the pedestrian bridge uses the Warren Truss frame type. This shape was chosen because it has the highest stiffness compared to the type of Howe Truss and Pratt Truss. Based on bridge structure analysis show that, with dimension 4x6 cm bridge can bear the load of plan until span 10 m with maximum deflection 9.9 mm Keywords: design, pedestrian bridge, 3D model, SAP2000. ABSTRAK Perencanaan jembatan yang ramah lingkungan menjadi aspek tersendiri yang harus diperhatikan,seiring berkembangnya isu pemanasan globaldan krisis energi. Penelitian ini mengkaji tentang perencanaan jembatan pejalan kaki menggunakan material kayu hutan rakyat. Analisis dilakukan dengan pemodelan 3D pada software bantu SAP2000. Tahapan penelitian terdiri dari pengujian mechanical properties kayu dan optimasi bentang maksimum jembatan.Hasil pengujian sifat mekanik didapatkan hasilbahwa kayu jati hutan rakyat Blora memiliki nilai Emin 5757 MPa. Berdasarkan SNI-7973:2013 nilai tersebut termasuk dalam kode mutu E11. Desain jembatan pejalan kaki menggunakan tipe rangka Warren Truss.Bentuk ini dipilih karena memiliki kekakuan yang paling tinggi dibandingkan dengan tipe Howe Truss dan Pratt Truss.Berdasarkan analisis struktur jembatan menunjukkan bahwa, dengan kayu dimensi 4x6 cm jembatan dapat memikul beban rencana hingga bentang 10 m dengan defleksi 9.9 mm Kata Kunci :desain, jembatan pejalan kaki, 3D model, SAP2000.
Keterampilan Menulis Karya Ilmiah Tentang Inovasi Pengembangan Perpustakaan Bagi Pustakawan Sekolah
Authors: Kristyanto Dian , Shintawati Yanuastrid , Sauqy Muh , Titi Elasa Yohana , Lombu Tati Suarsi 
Published: April 2023

As a profession that is supported by science, librarians need to hone their scientific writing skills, one of the benefits derived from these skills is that it makes it easier for them to develop school libraries and become pioneers in moving literacy programs. The purpose of this community service is to guide school librarians in terms of writing scientific papers, especially those that specifically raise themes or issues regarding the development of school libraries. The method used is online-based socialization by emphasizes four main strategies including online seminars, online training, questions and answers, and group discussion forums. The results achieved in this activity were that the implementation was carried out in three sessions with different material topics related to writing scientific papers for school librarians. This Abdimas activity obtained several results, including the team succeeded in deciphering the skills of the participants related to scientific writing, unraveling phenomena that appeared in the school library from the activity participants, generating commitment from participants to produce scientific works, creating social media groups, and documenting activities. Keywords: librarian, school library, scientific work
Pierwsze długie grobowce ziemne w centralnej Wielkopolsce
Authors: Żurkiewcz Danuta , Niebieszczański Jakub , Romaniszyn Jan , Teska Sebastian 
Published: April 2023

Artykuł opisuje wyniki sondażowych prac wykopaliskowych przeprowadzonych na jednym z pierwszych rozpoznanych nad środkową Wartą cmentarzysk megalitycznych kultury pucharów lejkowatych. W trakcie wykopali zbadano powierzchnię 80m2 obejmująca czoła dwóch z pięciu grobowców zlokalizowanych na cmentarzysku. Pozyskano materiały związane z kultura przeworską i kulturą pucharów lejkowatych. Z przepalonych kości zwierzęcych (?) ulokowanych w nasypie jednego z grobowców uzyskano dwie daty 14C wskazujące na przedział 3633-3516 BC (przy prawdopodobieństwie 68%). W ramach wąskiego pasa rozpoznania objętego badaniami wykopaliskowymi, założyć można, że obstawa boczna grobowców zbudowane była z rowów zagłębionych w calec i wypełnionych głazami różnych rozmiarów. Płaszczem-brukiem kamienny mógł być również przykryty nasyp tych mogił. W ramach dostępnych dla grupy wschodniej KPL analogii do tego typu konstrukcji, założenia z Soboty wydają się być unikatowe.
Nexus Between Corporate Social Responsibility Disclosure And Profitability Of Firms Listed At Dar Es Salaam Stock Exchange.
Authors: Ngollo Magwana Ibrahim , Mwenda Beny 
Published: April 2023

Modern corporations are for people and the environment, making CSR disclosure essential. It is debatable if CSR disclosure influences corporate profitability. This study aims to demonstrate the relationship between CSR disclosure and the profitability of Dar es Salaam Stock Exchange-listed firms (DSE). The research used mixed methods with an explanatory sequential design on 21 publicly traded firms from 2006 to 2021. DSE and annual reports were mined for data. Interviews produced qualitative information. Using the Random Effect model with three estimates (1, 2, 3) and theme analysis, quantitative and qualitative data were analysed. Analysis revealed that CSR disclosure has a significant positive effect on firm profitability measured by ROA and ROE. Findings signify legitimacy and stakeholder theory in relation to CSR disclosure practices. CSR disclosure benefits the image, business, and public trust of a firm, as well as its sales. Managers should encourage CSR for image and commercial enhancement. Community and the firm rely on one another. CSR disclosure enhances community-business connections. The mixed study design, new control variables, and paucity of literature on the relationship between CSR disclosure and corporate profitability in east Africa contribute to the originality of this research.
Reliability of Stress - Strength and Its Estimation of Exponentiated Q-Exponential Distribution
Authors: Jalal Mohammed. S. , Batah Feras Sh. M. 
Published: April 2023

In this paper, we study a single stress-strength reliability system , where Ƹ and ƴ are independently Exponentiated q-Exponential distribution. There are a few traditional estimating approaches that are derived, namely maximum likelihood estimation (MLE) and the Bayes (BE) estimators of R. A wide mainframe simulation is used to compare the performance of the proposed estimators using MATLAB program. A simulation study show that the Bayesian estimator is the best estimator than other estimation method under consideration using two criteria such as the “mean squares error (MSE)” and “mean absolutely error (MAPE)”.
Numerical Study of Compressible and Weak Compressible Flows in Channel Based on Artificial Compressibility Method and Fully Artificial Compressibility Method
Authors: Mohammed Fatima A. , Al-Muslimawi Alaa H. 
Published: April 2023

In this article, a numerical study of compressible and weak compressible Newtonian flows is achieved for a time marching, Galerkin algorithm. A comparison between two numerical techniques for such flows, namely the artificial compressibility method (AC–method) and the fully artificial compressibility method (FAC–method) is performed. In the first artificial compressibility parameter ( is added to the continuity equation, while this parameter is added to both continuity and momentum equations in the second technique. This strategy is implemented to treat the governing equations of Newtonian flow in cylindrical coordinates (axisymmetric). Particularly, this study concerns with the effect of the artificial compressibility parameters on the convergence level of solutions components. To confirm the analysis of these approaches, Poiseuille flow along a circular channel under an isothermal state is used as a simple test problem. The results show that when the AC-method is used there is a significant reduction in the level of time convergence of pressure and axial velocity compared to that with FAC-method. Here, for compressible flow the Tail model of state is employed to relate the pressure to density. In this context, the effect of Tail parameters and Reynolds number on the time convergence of solution components is also investigated in the present study. The results indicate a significant reduction in the time-stepping convergence as increasing in the {B,m}-value. In contrast, more difficulties are faced in the convergence when the level of the Reynolds number is increasing.
Treatment Missing Data of Daily and Monthly Air Temperature in Iraq by Using Mean Method
Authors: Yassen Ali Hamid , Abdul Kareem Asraa Khtan 
Published: April 2023

Frequent data in weather records is essential for forecasting, numerical model development, and research, but data recording interruptions may occur for various reasons. So, this study aims to find a way to treat these missing data and know their accuracy by comparing them with the original data values. The mean method was used to treat daily and monthly missing temperature data. The results show that treating the monthly temperature data for the stations (Baghdad, Hilla, Basra, Nasiriya, and Samawa) in Iraq for all periods (1980-2020), the percentage for matching between the original and the treating values did not exceed (80%). So, the period was divided into four periods. It was noted that most of the congruence values increased, reached in summer (70%-100%), and decreased somewhat in winter. While the daily treatment using the mean method for the stations Baghdad and Basra (2010-2020), it turns out that most of the congruence values in the summer ranged (70%-100%), but in winter, the congruence is often decreased. Therefore, this method gives high accuracy when treating monthly and daily temperatures in summer and less in winter.