bluuebunny/crossref_metadata_2025_split huggingface dataset:
Peningkatan kemampuan psikomotorik siswa dalam pembelajaran bola voli passing atas menggunakan teknik bola pantul pada siswa kelas X MAN 1 Kota Semarang
Authors: Pratama Angga , Zhannisa Utvi Hinda , Royana Ibnu Fatkhu 
Published: August 2021

Angga Pratama, "Increasing the Psychomotor abilities of Students in Learning Top Passing Volleyball Using the Bounce Ball Technique in Class X Students of MAN 1 Semarang City". Essay. Department of Physical Education for Health and Recreation, Faculty of Social Sciences and Sport Education, PGRI University Semarang, 2020. Utvi Hinda Zhannisa, S.Pd., M.Ordan Ibnu Fatkhu Royana, S.Pd., M.Pd. Education is a very important field, especially in Indonesia. In the language of the definition of education is the process of changing the attitudes and behaviour of a person or group of people in an effort to mature humans through teaching and training efforts that are in accordance with the educational procedure itself. The purpose of this study was to determine the improvement of students' psychomotor abilities in learning volleyball using the bounce ball technique in class X students in MAN 1 Semarang City. The design used in this study belongs to the type of quantitative research. The use of a quantitative approach with pre-experimental methods. The population in this study were students of class X in MAN 1 Semarang City. The research sample was taken by means of random sampling. This research will involve 106 students of MAN 1 Semarang City. Based on the calculation, the sig value for pretest data obtained the sig value = 0.064> 0.05. For the posttest data, the sig = 0.056> 0.05 was obtained, so it can be concluded that the pretest and posttest data are homogeneous. The increase in the ability to pretest all volley passing is a minimum of 82,675%. for a maximum value of 89.33%. Data analysis and discussion obtained the following conclusions: There are differences in the psychomotor abilities of students in learning volleyball passing over before and after being given training using the bouncing ball technique in class X MAN 1 Semarang City. From these results, it can be concluded that there is an increase in the psychomotor abilities of students in learning volleyball passing overusing the bouncing ball technique in class X MAN 1 Semarang City students. The increase in the percentage of overpassing ability is 22.38%. It is better if the class X student coaches of MAN 1 Semarang City apply exercises using the bouncing ball technique considering that this exercise has been proven effective in improving students' psychomotor skills in learning volleyball passing over.
Prinsip Kebebasan Belajar Imam Al - Ghazali Dalam Sistem Among Prespektif Ki Hajar Dewantara
Authors: Fahrudin Yusuf Wiwin , Badrun Nafi'uddin Moh 
Published: August 2021

Education is a very complex activity. Almost all dimensions of human life are seen in the educational process, either directly or indirectly. Under no circumstances can humans resist the effects of implementing education. Education is also a process in which it finds transformation both within oneself and in the community. Therefore, the correct educational process is to free a person from various confines, intimidation and exploitation. This is a portrait of the world of education which is increasingly concerning, even disturbing many people. This situation implies that the dehumanization of school education becomes something that cannot be separated from life, education seems to be the ghost of society. The dehumanization of education, to borrow Paulo Freire's term, is education that oppresses, curbs, and shackles the subject of learning, both the learner and the teacher himself. The context of the research in this scientific work is to discuss the principle of freedom of learning of Imam Al-Ghazali and how the principle of the system among Ki Hajar Dewanatara's perspective.
This research is a library research (Library Research), by discussing the principle of freedom of learning by Imam Al-Ghazali and how the principle of the system among Ki Hajar Dewanatara's perspective. Data collection was carried out with yellow books and books, journals, theses, and other scientific works related to the above discussion. Data analysis is carried out by discussing content (content analysis) which is sometimes found in books and books. Check the validity of the data is done with Credibility (Credibilty).
The results of this study indicate that: The basic principle of Imam Al-Ghazali's freedom of learning can be interpreted as a conscious effort that leads to the creation of outer and inner behavior to do good and stay away from evil, to have a complete personality both to himself or to others. And also in the principle of the Among Ki Hajar Dewantara system in the implementation of learning at Ki Hajar Dewantara's school, using the "Among System". In the Among System, every teacher (pamong) as a leader in the educational process is required to behave: Ing Ngarsa Sun Tuladha, Ing Madya Mangun Kasra, Tut Wuri Handhayani.
Por uma educação musical crítica frente ao consumo e à alienação
Authors: Pereira Eliton Perpetuo Rosa , Pereira André Bernardes , Costa Cristiano Aparecido da 
Published: September 2021

O objetivo geral desta pesquisa é compreender como a teoria crítica contribui para pensarmos uma educação musical mais reflexiva e resistente frente ao consumo e à alienação. Temos por base algumas teorias de resistência à influência da indústria cultural e a busca por uma formação musical em consonância com ideários de uma sociedade mais autônoma. Tendo por fundamentos os estudos de Theodor Adorno, e outros autores ligados à Teoria Crítica, procuramos contemplar a proposta de compreender a relação entre música e consumo. Desse modo, foi realizada uma pesquisa de opinião com docentes e estudantes de música de uma instituição de ensino superior para demonstrar pontos relativos ao consumo e à formação humana nas aulas de música. A análise qualitativa dos dados dessa pesquisa foi embasada nas seguintes categorias: consumo, alienação e resistência à indústria cultural. Destarte, procuramos compreender como os elementos de uma formação crítica podem contribuir para pensarmos uma educação musical mais reflexiva e resistente frente ao consumo e alienação.
To Assess the Prevalence Rate of Hepatitis C among the Solid Waste Handler in Selected Areas
Authors: Wanjari Mayur , Mendhe Deeplata 
Published: September 2021

Introduction: Solid waste handlers are subjected to a wide range of occupational hazards. Among these hazards is the infection from hepatitis A, B or C viruses (HAV, HBV or HCV). This relationship has been the study subject of many researchers around the world, given that the infection of hepatitis viruses is a significant cause of morbidity and a socio-economic burden.Viral hepatitis is a liver inflammation arising from viral infections. There are classes of viruses affecting the liver. The most popular forms are hepatitis B (HBV) and hepatitis C viruses (HCV).
Objective: this study is planning to assess the prevalence rate of Hepatitis C among solid waste handlers in selected areas.
Methodology: Cross-sectional study research designed will be used in this study conducted on a solid waste handler. The unlikely purposefully sampling technique was used to select a sample for this study to analyze the prevalence rate. The researcher's study included 100 population from the selected area and investigation of Hepatitis C will do at A.V.B.R.H Hospital Sawangi (M) Wardha. The population was selected according to inclusion and exclusion criteria.
Expected Outcome: In this research study expected outcome is solid waste handlers are may be suffering from Hepatitis C because of their working pattern and environment.
Conclusion: The conclusion will be drawn from the results.
Morphological and Flowering Characteristics of Shallot (Allium cepa Var. Aggregatum) in Response to Gibberellic Acid and Vernalization
Authors: Marlin Marlin , Hartal Hartal , Romeida Atra , Herawati Reny , Simarmata Marulak 
Published: September 2021

Shallot plants have variations in morphological and flowering characters. Flowering ability can be induced by the treatment of gibberellic acid (GA3) and exposing to cold temperature (vernalization). The objectives of the research were to determine the effect of GA3 and vernalization on the morphological and flowering characters of 5 shallot varieties. Field study was organized in a completely randomized block design with three replications to evaluate the responses of 5 varieties of shallots (Bauji, Bima Brebes, Super Philip, Tajuk, and Thailand) to GA3 with the concentrations ranged from zero to 150 mg L-1. Plants were maintained for 65 days until harvesting. The second study was organized in a completely randomized design with 3 replications to evaluate the responses of the five varieties of shallot to vernalization. The vernalization of shallot bulbs were done at 8 o C for 6 weeks. The results indicated that a Super Phillip variety showed the highest response to GA3 observed in the number of leaves and bulbs. At 100 mg L-1 of GA3 increased the plant height up to 45.74 cm. The results from the second study showed that vernalization was effective to increase flowering only on the Ilokos variety. But the other varieties were not sensitive to vernalization. Based on morphological and flowering characters, 5 varieties of shallots were clustered into 3 groups, namely: sensitive flowering included Bentanis, Bma Brebes and Tajuk variety, medium sensitive flowering included Ilokos variety, and non-sensitive flowering included Sumenep variety.
Carbon Free and Noble Metal Free Ni2Mo6S8 Electrocatalyst for Selective Electrosynthesis of H2O2
Authors: Xia Fan , Li Bomin , Liu Yiqi , Liu Yuzi , Gao Siyuan , Lu Ke , Kaelin Jacob , Wang Rongyue , Marks Tobin J. , Cheng Yingwen 
Published: August 2021

AbstractElectrocatalytic two‐electron reduction of oxygen is a promising method for producing sustainable H2O2 but lacks low‐cost and selective electrocatalysts. Here, the Chevrel phase chalcogenide Ni2Mo6S8 is presented as a novel active motif for reducing oxygen to H2O2 in an aqueous electrolyte. Although it has a low surface area, the Ni2Mo6S8 catalyst exhibits exceptional activity for H2O2 synthesis with >90% H2O2 molar selectivity across a wide potential range. Chemical titration verified successful generation of H2O2 and confirmed rates as high as 90 mmol H2O2 gcat−1 h−1. The outstanding activities are attributed to the ligand and ensemble effects of Ni that promote H2O dissociation and proton‐coupled reduction of O2 to HOO*, and the spatial effect of the Chevrel phase structure that isolates Ni active sites to inhibit OO cleavage. The synergy of these effects delivers fast and selective production of H2O2 with high turn‐over frequencies of ≈30 s−1. In addition, the Ni2Mo6S8 catalyst has a stable crystal structure that is resistive for oxidation and delivers good catalyst stability for continuous H2O2 production. The described Ni‐Mo6S8 active motif can unlock new opportunities for designing Earth‐abundant electrocatalysts to tune oxygen reduction for practical H2O2 production.
Sustainable 3D Structural Binder for High‐Performance Supercapacitor by Biosynthesis Process
Authors: Guan Qing‐Fang , Ling Zhang‐Chi , Han Zi‐Meng , Luo Tong‐Tong , Yang Huai‐Bin , Yang Kun‐Peng , Yin Chong‐Han , Yu Shu‐Hong 
Published: August 2021

AbstractFlexible supercapacitors represent an attractive technology for the next generation of wearable consumer electronics as power sources but usually suffer from relatively low energy density. It is highly desired to construct high‐performance electrodes for the practical applications of supercapacitors. Here, inspired by the natural structure of the spider web, an elaborate design of binder is reported through a biosynthesis process to construct flexible electrodes with both excellent mechanical properties and electrochemical performance. Through this strategy, a spider‐web‐inspired 3D structural binder enables large ion‐accessible surface area and high packing density of active electrode material as well as efficient ion transport pathways. As a result, a high areal capacitance of 4.62 F cm‐2 and a high areal energy density of 0.18 mW h cm‐2 is achieved in the composite electrodes and symmetric supercapacitors, respectively, demonstrating a promising potential to construct flexible energy storage devices for diverse practical applications.
Abrasion and Fracture Self‐Healable Triboelectric Nanogenerator with Ultrahigh Stretchability and Long‐Term Durability
Authors: Jiang Jinxing , Guan Qingbao , Liu Yina , Sun Xuhui , Wen Zhen 
Published: August 2021

AbstractSince triboelectrification results from materials in physical contact, the durability of triboelectric nanogenerators (TENGs) must be improved. However, it still poses challenges to continuously repair surface abrasion even when self‐healable materials are introduced. In this study, an ultrastretchable TENG (US‐TENG) that simultaneously heal the fracture and abrasion at room temperature is fabricated. By incorporating hydrogen bonds and dynamic metal‐ligand coordination into polydimethylsiloxane chains, the synthesized elastomers possess ultrahigh stretchability (10 000%) and remarkable self‐healing property (100% efficiency) at room temperature. Working in contact‐separation mode, the electrical outputs with 2 × 2 cm2 area can reach 140 V, 40 nC, 1.5 µA, respectively. Besides, the US‐TENG shows a stretchability of 1800% with high electrical outputs. Even if it is stretched to break or scratched to wear out, it can recover its electrical outputs in 20 min and 2 h at room temperature, respectively. Finally, the application of the US‐TENG as flexible power sources and self‐powered pressure sensors is demonstrated. This designed strategy with ultrahigh stretchability and excellent self‐healing properties can meet the wide applications of flexible and wearable electronics for long‐term use.
In Situ Monitoring of Polaron Localization and Cell Activity with Charge Accumulation Spectroscopy
Authors: Zhang Yu , Yang Li , Wang Jintao , Xu Wangying , Zeng Qiming , Xue Yan 
Published: August 2021

AbstractLocalization of charge carriers directly affects charge transport and local potential fluctuations and is a critical factor dictating the performance of organic bioelectronic devices. Understanding how the polaron localization at the solid−water interface is influenced by the microscopic structural ordering of the organic semiconducting films can provide complementary information to achieve better control on the electrochemical stability of bioelectronic devices. Here, charge accumulation spectroscopy is utilized to explore the structure‐dependent polaron localization in an electrolyte‐gated organic field‐effect transistor structure. The results reveal that the ordered and closely packed systems exhibit much higher absorption cross‐sections (σp) than disordered and isolated molecules. Therefore, the charge‐induced absorption feature can be utilized to monitor in situ the microscopic morphology variations of organic semiconducting films under electrolyte and trace the entire cell detachment process noninvasively. This study suggests that the spectroscopic signature of polaronic charge carriers, which is highly sensitive to the local environment surrounding the probed chromophores, serves as an effective probe to detect the structure‐dependent charge transport features in organic bioelectronic devices.
Synthesis and Modification of Boron Nitride Nanomaterials for Electrochemical Energy Storage: From Theory to Application
Authors: Pu Jun , Zhang Kai , Wang Zhenghua , Li Chaowei , Zhu Kaiping , Yao Yagang , Hong Guo 
Published: August 2021

AbstractAs a conventional insulating material, boron nitride (BN) has been mainly investigated in the electronics field. Very recently, with the development of preparation/modification technology and deeper understanding of the electrochemical mechanisms, BN‐based nanomaterials have made significant progress in the field of electrochemistry. Exploiting the characteristics of BN for advanced electrochemical devices is expected to be a breakthrough that will stimulate a new energy revolution. Owing to its chemical and thermal stability, as well as its high mechanical strength, BN can alleviate various inherent problems in electrochemical systems, such as thermal deformation of conventional organic separators, weak solid electrolyte interface layers of metal anodes, and electrocatalyst poisoning. The integration of BN with various electrochemical energy technologies is systematically summarized from the perspectives of material preparation, theoretical calculations, and practical applications. Moreover, the challenges and prospects for the future development of BN‐based electrochemistry are highlighted.
Environmentally Friendly Graphene‐Based Conductive Inks for Multitouch Capacitive Sensing Surfaces
Authors: Franco Miguel , Correia Vitor , Marques Pedro , Sousa Fábio , Silva Rui , Figueiredo Bruno R. , Bernardes Adriana , Silva Rui P. , Lanceros‐Mendez Senentxu , Costa Pedro 
Published: August 2021

AbstractConductive graphene‐based inks can be tailored for functional applications and, in particular, for printed electronics. Transparent, flexible, and easy printable materials are nowadays increasingly required for sensing applications. In this context, a capacitive multitouch sensing surface is developed using conductive graphene nanoparticles‐based ink with carboxymethyl cellulose as a binder. The rheological properties of the ink are tailored to be printed by the screen‐printing technique. The touchscreen is based on printed conductive lines and columns and thus the characteristics of the printed lines are optimized based on the line width and number of printing steps. The optimal printed conditions are 0.5 mm of width and five printing steps, leading to electrical resistance of 2.4 kΩ. The screen‐printed flexible touchscreen is composed of 40 columns × 28 rows. An electric circuit and a graphic interface are also developed leading to an 8” touchscreen with multitouch capabilities and fast signal processing.
Recent Advances in Catalytic Asymmetric Aza‐Michael Addition Triggered Cascade Reactions
Authors: Song Yong‐Xing , Du Da‐Ming 
Published: August 2021

AbstractAs an important branch of the Michael addition reaction, the aza‐Michael addition cascade reaction has been developed rapidly in recent years. This is because the reaction serves as an important method for effectively constructing functionalized C−N bonds, which can be widely used in the synthesis of chiral drugs and their intermediates and natural products. Given the importance of this topic, this review highlights the recent developments of aza‐Michael addition triggered cascade reactions in asymmetric synthesis, including aza‐Michael/Michael, aza‐Michael/Aldol, aza‐Michael/Henry, aza‐Michael/hemiacetal, aza‐Michael/Mannich, aza‐Michael/alkylation, aza‐Michael/cyclization, aza‐Michael/ring‐opening, aza‐Michael‐IED/HAD, aza‐Michael/INCR, and aza‐Michael/1,6‐conjugate addition reactions. In this paper, the reaction mechanism and derivatization experiments of different reactions are timely introduced to provide a more comprehensive theoretical basis for subsequent studies.magnified image
Construction of Indole‐Fused Heterocycles Starting from 2‐Thioxoindolines, Iminoindolines, and Their Derivatives
Authors: Li Jun‐Long , Zhao Qian , Gou Chuan , Li Qing‐Zhu , Leng Hai‐Jun , Huang Qian‐Wei , Liu Yue 
Published: August 2021

AbstractIndole‐based heterocycles containing sulfur or nitrogen atoms are important frameworks that occur widely in biological active natural products and drugs. Consequently, several novel chemical transformations and new catalytic strategies have been developed for the preparation of these skeletons in a highly efficient and selective manner. This review focuses on recent advancements in the construction of indole‐fused heterocyclic compounds by using iminoindolines, 3‐diazoindol‐2‐imines, 2‐thioxoindolines, and their derivatives as starting materials.magnified image
Carbene Catalyzed Access to 3,6‐Disubstituted α‐Pyrones via Michael Addition/Lactonization/Elimination Cascade
Authors: Khatana Anil Kumar , Singh Vikram , Gupta Manoj Kumar , Tiwari Bhoopendra 
Published: August 2021

AbstractThe first direct transition metal‐free access to 3,6‐disubstituted α‐pyrones from α‐chloro aldehydes and β‐tosyl enones is reported. The reactions proceed via the Michael addition/lactonization/elimination cascade. The regioselective addition of NHC‐bound enolates/homoenolates to the enones bearing a bulkier functionality such as tosyl group at the β‐position has remained challenging. The 3,6‐disubstituted α‐pyrones could be converted to valuable products such as 1,2,3,4‐tetrasubstituted benzenes, 1,4‐disubstituted naphthalenes as well as anthracenes and 6,13‐disubstituted dihydro‐ethenopentacenes in a simple operation.magnified image
A Study of the Reactions of 3‐Bromopropenals with Anilines for the Synthesis of α‐Bromo Enaminones
Authors: Suresh Sundaram , Bhimrao Patil Prakash , Yu Pao‐Hsing , Fang Chia‐Chi , Weng Yin‐Zhi , Kavala Veerababurao , Yao Ching‐Fa 
Published: August 2021

AbstractA one‐pot strategy for the synthesis of α‐bromo enaminones is reported. The reactions proceed via the p‐toluenesulfonic acid monohydrate (TsOH ⋅ H2O) catalyzed reactions of 3‐bromopropenals with anilines in dimethyl sulfoxide (DMSO) and does not require an external brominating agent. The chemoselective 1,2‐addition was accomplished by employing aniline with a sterically hindered electron‐withdrawing group attached at the ortho‐position. In addition, the reactions involving other aniline derivatives as nucleophiles have resulted in minor yields of 1,4‐addition product. The 3‐bromopropenals showed a diverse range of reactivities with aniline derivatives.magnified image
Interfacial “Anchoring Effect” Enables Efficient Large‐Area Sky‐Blue Perovskite Light‐Emitting Diodes
Authors: Shen Yang , Wang Jing‐Kun , Li Yan‐Qing , Shen Kong‐Chao , Su Zhen‐Huang , Chen Li , Guo Ming‐Lei , Cai Xiao‐Yi , Xie Feng‐Ming , Qian Xiao‐Yan , Gao Xingyu , Zhidkov Ivan S. , Tang Jian‐Xin 
Published: August 2021

AbstractWhile tremendous progress has recently been made in perovskite light‐emitting diodes (PeLEDs), large‐area blue devices feature inferior performance due to uneven morphologies and vast defects in the solution‐processed perovskite films. To alleviate these issues, a facile and reliable interface engineering scheme is reported for manipulating the crystallization of perovskite films enabled by a multifunctional molecule 2‐amino‐1,3‐propanediol (APDO)‐triggered “anchoring effect” at the grain‐growth interface. Sky‐blue perovskite films with large‐area uniformity and low trap states are obtained, showing the distinctly improved radiative recombination and hole‐transport capability. Based on the APDO‐induced interface engineering, synergistical boost in device performance is achieved for large‐area sky‐blue PeLED (measuring at 100 mm2) with a peak external quantum efficiency (EQE) of 9.2% and a highly prolonged operational lifetime. A decent EQE up to 6.1% is demonstrated for the largest sky‐blue device emitting at 400 mm2.