bluuebunny/crossref_metadata_2025_split huggingface dataset:
Penggunaan Metode Demonstrasi Pada Materi Sistem Pencernaan Makanan Dalam Upaya Meningkatkan Hasil Belajar Siswa Kelas XI IPA1 SMAN Binaan Khusus Kota Dumai Tahun Pelajaran 2016/2017
Authors: Jannah Miftahul 
Published: March 2022

Penelitian ini bertujuan untuk memperbaiki proses belajar dan hasil belajar biologi siswa kelas XI IPA SMAN Binaan Khusus Kota Dumai melalui Metode Demonstrasi Pada Materi Sistem Pencernaan Makanan manusia. Selama ini pembelajaran Biologi di kelas lebih didominasi oleh guru sehingga siswa bersifat pasif dalam belajar Biologi, frekuensi siswa yang bertanya kurang, tidak mempunyai tanggung jawab dalam mengerjakan tugas dan siswa pandai tidak membantu siswa yang kurang pandai. Penelitian ini merupakan penelitian tindakan kelas (PTK) yang terdiri atas dua siklus. Subjek dalam penelitian ini adalah siswa kelas XI MIPA1 SMAN Binaan Khusus Kota Dumai pada semester I Tahun Pelajaran 2016/2017 dengan jumlah siswa 33 orang dengan 15 orang siswa laki-laki dan 18 orang siswa perempuan.Instrumen pengumpulan data pada penelitian ini adalah lembar pengamatan aktivitas guru dan siswa dan lembar hasil belajar. Teknik pengumpulan data dalam penelitian ini adalah teknik pengamatan dan teknik tes. Hasil pengamatan dianalisis secara deskriptif kualitatif, sedangkan hasil belajar siswa dianalisis secara analisis data kuantitatif dengan analisis ketercapaian KKM setiap indikator dan analisis rata-rata hasil belajar. Peningkatan hasil belajar biologi siswa dapat terlihat dari jumlah siswa yang tuntas pada studi awal yaitu 13 orang atau 39,39 % meningkat pada siklus 1 menjadi 23 orang atau 69,6%%. Dan mengalami peningkatan pada siklus 2 menjadi 29 orang yang tuntas atau 87,88 %. Berdasarkan catatan lapangan observer dalam penilaian aktivitas siswa, ternyata sudah sebagian besar siswa telah aktif berpartisipasi dalam pembelajaran sehingga siswa yang kurang aktif, yang tidak mengerti, yang hanya terfokus pada keterangan guru semakin berkurang dan menurun.Dari hasil penelitian diambil kesimpula bahwa penggunaan metode demonstrasi pada materi sistem pencernaan makanan dapat meningkatkan aktivitas dan hasil belajar biologi siswa kelas XI IPA1 SMAN Binaan Khusus Kota Dumai.
Efektivitas Lembar Kerja Peserta Didik (LKPD) Berbasis Literasi Sains Untuk meningkatkan Kemampuan Literasi Sains Pada Materi Sistem Pencernaan Manusia
Authors: Harahap Siti Hafsah 
Published: March 2022

Literasi sains menjadi kunci utama menghadapi berbagai tantangan abad 21. Kemampuan literasi sains peserta didik masih tergolong rendah, salah satu penyebabnya adalah rendahnya muatan literasi sains pada bahan ajar. Bahan ajar yang paling efektif digunakan dalam pembelajaran di kelas adalah LKPD. Penelitian ini bertujuan mendeskripsikan keefektifan Lembar Kerja Peserta Didik (LKPD) berbasis literasi sains pada materi system pencernaan makanan kelas XI IPA SMA untuk meningkatkan kemampuan literasi sains peserta didik. Penelitian ini merupakan penelitian quasi eksperimen dengan desain penelitian pretest-posttest control group design. Populasi pada penelitian ini adalah seluruh peserta didik kelas XI SMAN 4 Dumai, sampel penelitian adalah peserta didik kelas XI MIA 2. Pemilihan sampel berdasarkan Teknik simple random sampling. Instrumen pengumpulan data berupa soal tes kemampuan literasi sains yang telah diuji validitas, reabilitas, daya pembeda dan taraf kesukaran. Hasil tes kemudian diuji prasyarat analisis data dan uji hipotesis menggunakan uji Mann-Whitney dan Gain score. Hasil penelitian menunjukkan nilai rata-rata pretest dan posttes pada kelas eksperimen meningkat dari 37,58 dengan kriteria kurang menjadi 80,56 dengan kriteria baik, nilai peningkatan tergolong sedang dengan nilai N-Gain sebesar 0,7 sedangkan pada kelas kontrol dari nilai 36,83 menjadi 64,84 dengan N-Gain 0,4. Berdasarkan nilain n-gain tampak bahwa pembelajaran menggunakan LKPD berbasis literasi sains pada kelas eksperimen dapat meningkatkan kemampuan literasi sains peserta didik, sehingga dapat disimpulkan bahwa LKPD berbasis literasi sains efektif digunakan untuk meningkatkan kemampuan literasi sains peserta didik
Validation of the Canadian French version of the fear of COVID‐19 scale in the general population of Quebec
Authors: Attieh Randa , Koffi Kouamé , Touré Moustapha , Parr‐Labbé Érica , Pakpour Amir H. , Poder Thomas G. 
Published: March 2022

AbstractBackgroundThe purpose of this study was to develop a Canadian French translation of the fear of COVID‐19 scale (FCV‐19S) and assess its psychometric characteristics.MethodsA forward and backtranslation process was conducted for the Canadian French version of the FCV‐19S. The guidance of the ISPOR task force for translation and cultural adaptation was followed and cognitive debriefing interviews were conducted with six citizens. The final proofread Canadian French FCV‐19S was then administered to a large sample of citizens from the province of Quebec in Canada through an online survey. A quota sampling was conducted in 2020. Respondents from the survey also completed the Clinical Outcomes in Routine Evaluation (CORE)‐6D and the Sense of Coherence (SOC‐3) questionnaires. Several psychometric tests were performed to investigate the reliability (internal consistency) and validity of the Canadian French FCV‐19S, including construct validity, concurrent validity, and Rasch analysis.ResultsThe translation process was conducted without any major difficulties. The cognitive debriefing interviews led to no change in the reconciled translation. The survey collected answers from 3428 citizens. Results indicated that the factor structure of the Canadian French FCV‐19S is a unidimensional factor fitting well with the data. The scale showed adequate reliability (Cronbach's alpha of .903) and concurrent validity, as indicated by significantly negative correlation with CORE‐6D (r = –.410) and SOC‐3 (r = –.233). The Canadian French FCV‐19S properties tested using Rasch analysis was also very satisfactory.ConclusionsThe results of the present study indicated that the Canadian French version of FCV‐19S is a unidimensional tool with robust psychometric properties in the adult's population of all ages residing in the province of Quebec, Canada.
Consumer matching costs to context: Status quo bias, temporal framing, and household energy decisions
Authors: Gill Carrie A. , Atlas Stephen A. , Hardisty David J. , Scott Shawn P. 
Published: March 2022

AbstractOne challenge of promoting energy‐efficient behavior change is status quo bias: consumers are reluctant to change away from their current level of energy usage, even if their energy usage is higher than they would actively choose. Using experimental data, this article examines what temporal frame minimizes status quo bias and encourages energy‐efficient behavioral intentions. The authors find that individuals make the most energy efficient decisions when presented with a monthly framing because they are more easily able to think about monthly costs than daily or yearly costs. The authors investigate whether cognitive fluency could be an underlying mechanism, and find evidence that individuals are most fluent when energy costs are framed on a monthly basis.
Protective Effects of Shorea roxburghii Phenolic Extract on Nephrotoxicity Induced by Cyclophosphamide: Impact on Oxidative Stress, Biochemical and Histopathological Alterations
Authors: Hu Jun , Tong Changjun , Zhou Jiajun , Gao Chaoqing , Olatunji Opeyemi Joshua 
Published: March 2022

AbstractCyclophosphamide (CTX) is one of the most commonly used alkylating agents for the treatment of various cancers; however, CTX‐induced nephrotoxicity is one of the most prevailing side effects of the drug. Shorea roxburghii is a plant with diverse bioactivities including antioxidant, anti‐inflammatory and renoprotective effects. This study investigated the nephroprotective effect of Shorea roxburghii phenolic extract (SRPF) against CTX‐induced nephrotoxicity in rats. The rats were treated with SRPF (100 and 400 mg/kg) for 5 weeks and were concomitantly administered with CTX. The results indicated that treatment with SRPF significantly decreased serum creatinine, blood urea nitrogen (BUN), uric acid as well as renal MDA, IL‐6, TNF‐α, IL‐1β, NF‐kB and caspase‐3 levels. Furthermore, SRPF augmented the activities of renal SOD, CAT, GSH and GPx. SRPF also improved renal histopathological damages caused by CTX administration. In conclusion, these results suggested that SRPF showed substantial protective effects against CTX‐mediated renal toxicity via its antioxidant and anti‐inflammatory effects.
Hybrid optimization based learning technique for multi‐disease analytics from healthcare big data using optimal pre‐processing, clustering and classifier
Authors: Parimanam Kavitha , Lakshmanan Latha , Palaniswamy Thangam 
Published: March 2022

AbstractWith the rapid development of health information systems in recent years covering big data trends, clinical information is being adapted to understand important health trends and provide timely prophylactic treatment. However, the current plan fails to maintain a highly organized analysis and processing of health data. In addition, it collects issues that play an important role in determining quality. In this article, we propose a hybrid optimization based learning technique for multi‐disease analytics (HOL‐MD) from healthcare big data using optimal pre‐processing, clustering, and classifier. First, we introduce a capuchin search based optimization algorithm for preprocessing which removes the unwanted artifacts to enhance the detection accuracy. Second, we introduce a modified Harris Hawks optimization based clustering (MHHOC) technique used to select optimal features among multiple features which discovers the subgroups and reduce the dimensionality issues. We evaluated the performance of proposed HOL‐MD technique using standard US healthcare organization dataset, SUSY and HIGGS datasets. Finally, we proved the effectiveness of proposed RTL‐DNN techniques in terms of 11.5%, 9.3%, 2.75%, and 3.45% higher than the existing state‐of‐art techniques in terms of accuracy, precision, recall, and F‐measure respectively.
The Search for Efficient True Blue and Deep Blue Emitters: An Overview of Platinum Carbene Acetylide Complexes
Authors: Maganti Teja , Venkatesan Koushik 
Published: March 2022

AbstractDespite significant strides achieved in organic light emitting diode (OLED) based display technologies during the last decade, the search for highly stable and efficient true blue/deep blue emitters continues to remain elusive. During the past decade, emitters with the basic molecular scaffold consisting of Pt(II) acetylides and N‐heterocyclic carbene (NHC) ligands have opened interesting opportunities to tune the emission properties with desired chromaticity in the blue and deep blue region. With an aim to achieve the desired CIE coordinates along with low device roll‐off efficiencies and satisfactory color purity, a number of variations on the basic molecular fragment have been made. A number of NHC Pt(II) alkyne complexes bearing monodentate, bidentate and tridentate ligands have been synthesized and their photophysical investigations have been reported. Although NHC Pt(II) alkyne complexes have been explored in other areas of applications, much of the investigations have been primarily focused for their interesting emission properties appearing particularly in the shorter wavelength (450–495 nm) part of the electromagnetic spectrum for organic light emitting diode (OLED) devices. In this review, we provide an overview of the investigated NHC Pt(II) acetylide complexes by detailing their synthesis, luminescence properties, performance in devices and future perspectives.
Agronomic performance of normal‐leafed and semi‐leafless pea (Pisum sativum L.) genotypes
Authors: Tran Chi Thanh , Becker Heiko C. , Horneburg Bernd 
Published: March 2022

AbstractPea (Pisum sativum L.) is a major pulse crop important as feed and food. Due to the symbiosis with N‐fixing bacteria, it is a valuable component of low‐input cropping systems. The traditional cultivation of peas was limited by their high susceptibility to lodging. This problem was reduced, though not completely solved, by a semi‐leafless mutant. Almost all modern cultivars carry this mutant. It is still an open question as to whether the lack of leaflets may have impaired the productivity. In organic farming, there is still interest in normal‐leafed peas as they can better compete with weeds. To compare the two leaf types, 24 normal‐leafed and 30 semi‐leafless genotypes were evaluated in three environments. Semi‐leafless genotypes had a higher seed (51%) and straw (40%) yield, but most normal‐leafed genotypes were older or less adapted than the semi‐leafless ones. Some newer normal‐leafed cultivars achieved the same yield level, but their cultivation is only possible in mixtures with a supporting crop. Nitrogen content in seed (10%) and in straw (30%) was lower in semi‐leafless genotypes. A negative correlation of yield and N content was observed in both leaf types. However, semi‐leafless peas had a higher N yield in seed and in straw. No correlation between N yield in seed and straw was found, so it is possible to combine a high seed yield with a high N yield in the straw. This is particularly important in organic production systems, where peas are also grown to provide N to the following crop.
Assessment of psychosocial work hazards and workplace deviant behaviours of teachers in rural community‐based schools
Authors: Ede Moses Onyemaechi , Aye Eucharia Nchedo , Okeke Chinedu Ifedi 
Published: March 2022

AbstractThis is a cross‐sectional study that assessed the psychosocial work hazards and workplace deviant behaviours of teachers in rural community‐based schools. A total of 254 primary school teachers participated in the study. Copenhagen Psychosocial Questionnaire (COPSOQ) and Work Deviance Behaviour Scale were employed to elicit the teachers' responses. The descriptive statistics (frequency and percentage), and Pearson's correlation (r) statistical analysis were used to analyse the data. The results showed that the primary school teachers experience elements of psychosocial work hazards. It was also indicated that primary school teachers rarely exhibit work deviant behaviours. There is a significant positive relationship between psychosocial work hazards and workplace deviant behaviours of primary school teachers in Enugu State. In conclusion, it was suggested that teachers experience psychosocial work hazards and exhibit workplace deviant behaviours in primary schools in Enugu State Nigeria. Therefore, professionals in workplaces including schools should design practicable interventions that would help to reduce workplace deviance among employees in different works of life. With this, these should be reflected in decision‐making and policies implementations to rural communities and beyond.
Recyclable Carbon Fiber Reinforced Vanillin‐Based Polyimine Vitrimers: Degradation and Mechanical Properties Study
Authors: Wang Yuli , Xu Anchang , Zhang Lingwei , chen Zhicheng , Qin Rongyu , Liu Yang , Jiang Xiancai , Ye Dezhan , Liu Zengjin 
Published: March 2022

AbstractBoth environmental and economic factors have driven the development of degradable resin for carbon fiber (CF) recycling under mild conditions. However, the vast majority of thermosetting materials are difficult to recycle. This paper presents bio‐based polyimine vitrimers to fully recycle the CF. The effect of vitrimers fine structures on the thermal, mechanical, solvent resistance, and degradation properties is carefully investigated. The tensile strength at break and Young's Modulus of pure polyimine vitrimers reach ≈80.3 MPa and 2.89 GPa. Importantly, the mechanical property of isophoronediamine‐based polyimine vitrimers/two‐layers CF exhibits a slightly inferior value to that of bisphenol A epoxy. Polyimine vitrimers are easily degradable under acid solution at 60 °C for 24 h. The surface morphology and chemical structure of CF are not changed after recycling. This work on mildly degradable polyimine vitrimers from vanillin and readily recycling of CF is desirable for the development of eco‐friendly CF composites and lignin functional materials.
Enhancement of Chiroptical Responses of trans‐Bis[(β‐iminomethyl)naphthoxy]platinum(II) Complexes with Distorted Square Planar Coordination Geometry
Authors: Ikeshita Masahiro , Furukawa Sho , Ishikawa Takahiro , Matsudaira Kana , Imai Yoshitane , Tsuno Takashi 
Published: March 2022

AbstractInvited for this month's cover picture are the groups of Masahiro Ikeshita and Takashi Tsuno at Nihon University and Yoshitane Imai at Kindai University (Japan). The cover picture shows the comparison of circularly polarized luminescence (CPL) properties of square planar platinum(II) complexes with different coordination geometry. Computational studies have been carried out to investigate these structure‐dependencies, and revealed that the distortion of the coordination geometry results into an enhancement the chiroptical responses of these compounds. Read the full text of their Research Article at 10.1002/open.202100277.
Efficient Trimetallic Metal‐Organic‐Framework Derived Cu/Fe3C/N−C Electrocatalysts for Oxygen Reduction
Authors: Yang Jin‐Meng , Chen Feng , Zhu Hai‐Bin 
Published: March 2022

AbstractA series of porous N‐doped carbon electrocatalysts decorated with Cu and Fe3C, namely Cu/Fe3C/N−C‐x‐T (T=temperature, and x=Cu/Fe molar ratio), have been prepared for oxygen reduction by pyrolysis of trimetallic Cu/Fe/Zn MOF (MOF=Metal‐Organic Framework) precursors with variable Cu/Fe molar ratio. It reveals that the Cu/Fe molar ratio has a great impact not only on the morphologies of Cu/Fe3C/N−C‐x‐T electrocatalysts but also on the catalytic performance toward oxygen reduction. In 0.1 M KOH solution, the optimal Cu/Fe3C/N−C‐1‐1000 electrocatalyst can compete with the Pt/C benchmark, showing Eonset (onset potential) of 0.95 V (vs. RHE) and E1/2 (half‐wave potential) of 0.85 V (vs. RHE) (RHE=Reversible Hydrogen Electrode). Zinc‐air battery with Cu/Fe3C/N−C‐1‐1000 as the cathode also delivers a maximal power density of 90 mW.cm−2, and demonstrates a little decay in potential after running for 40 hrs at 20 mA.cm−2.
Investigation of deposition welding in vertical and horizontal position with a coaxial laser wire welding head
Authors: Biester Kai , Budde Laura , Barroi Alexander , Lammers Marius , Hermsdorf Jörg , Overmeyer Ludger 
Published: March 2022

AbstractDeposition welding of components using the laser metal deposition (LMD) process is a proven method of creating 3D structures. It is used for the manufacturing of components, the repair of machine parts and for cladding. Up to now, claddings have mainly been investigated in the flat welding position. Some investigations on deposition welding in vertical orientation are available with different processes. For the cladding of large components, welding in the vertical direction offers advantages. So far, there are no investigations on the LMD process with coaxial wire feeding when welding in vertical direction. Therefore, in this study, the influence of the welding direction, i.e., vertical down and vertical up weld seams, and the influence of the welding speed are investigated. Single weld seams, claddings and a wall are welded. A stable welding process could be achieved for a welding speed parameter window of 100 to 1000 mm/min. The results show that there is a statistical correlation between the welding direction and the waviness of the weld seams. Vertical up weld seams have a lower waviness. Another influence on the waviness is the welding speed. As the welding speed decreases, the waviness increases. The weld seam geometry is strongly dependent on the welding direction. With vertical down weld seams, the width and height of the weld seam vary depending on the distance welded. This can be attributed to the influence of the gravitational force. Vertical up weld seams, on the other hand, have a more uniform shape.
Noise and vibration characteristics of sub-fractional horsepower single-phase BLDC drives
Authors: Saed Nejat , Leitner Stefan , Krall Felix , Muetze Annette 
Published: March 2022

AbstractSingle-phase brushless DC (BLDC) drives are a cost-effective alternative for three-phase sub-fractional horsepower drives in automotive auxiliary applications. Inherent features of single-phase permanent magnet machines, such as high cogging torque and torque ripple, can, however, make them more audible than their three-phase counterparts. As some of these auxiliary drives are close to the passengers, where even a small amount of noise can be disturbing, the investigation into noise sources is essential to further address this challenge. In this paper, the dominant noise and vibration characteristics of single-phase BLDC machines are investigated for two different stator structures, i.e., salient-pole and claw-pole, and compared. Magnetic force density waves and finite element (FE) analyses are performed to analyze the electromagnetic forces resulting from the open-circuit condition as well as different switching strategies in the load condition. Structural analyses show that due to the mechanical structure’s lower stiffness and natural frequencies in the audible range, the example case machine with the claw-pole stator develops higher structure- and air-borne noise than the machine with the salient-pole stator.
Corneal hysteresis and intraocular pressure are altered in silicone-hydrogel soft contact lenses wearers
Authors: Marcellán María Concepción , Remón Laura , Ávila Francisco J. 
Published: March 2022

Abstract
Purpose
The aim of this work is to determinate the effects in the physical parameters in terms of intraocular pressure (IOP) and central corneal thickness (CCT) and corneal biomechanics in terms of corneal resistance factor (CRF) and corneal hysteresis (CH) of wearing silicone-hydrogel soft contact lenses (SiH-CLs) in young adult subjects during a short-term follow-up.

Methods
40 eyes of 20 healthy patients with a mean age of 22.87 ± 4.14 were involved in this study. Subjects with corneal diseases, dry eye, irregular astigmatism or who have been previous contact lens wearers were excluded. The ocular response analyzer (Reichert Ophthalmic Instruments) was used to measure CH, CRF and IOP and Scheimpflug imaging (the GALILEI™ Dual Scheimpflug camera analyzer, Ziemer) was used to measure CCT before and 10 days (Group 1) and 20 days (Group 2) after wearing the SiH-CLs.

Results
IOP was significantly decreased 10 days after using the SiH-CLs (p = 0.009). Within the 20 days' period, Group 2 revealed an even more pronounced decrease in IOP (p = 0.003) while CH increased significantly (p = 0.04). CCT and CRF did not show a significant change during the period of SiH-CLs use. Our finding allowed obtaining an empirical expression that relates IOP, CCT, CRF and CH within a biomechanical compensation experimental model.

Conclusions
Corneal biomechanical parameters and physical properties of the cornea may be altered due to SiH-CLs use. Our findings could have an impact on the management of glaucoma progression and ocular hypertension.