bluuebunny/crossref_metadata_2025_split huggingface dataset:
Crystal structure of dichlorido-bis(N-benzyl-2-(quinolin-8-yloxy)acetamide-κ2
N,O)copper(II) — ethyl acetate (1/1), C38H36N4O6Cl2Cu
Authors: Wang Wan-Wan , Deng Xiao-Wei , Wu Wei-Na 
Published: April 2019

Abstract
C38H36N4O6Cl2Cu, triclinic, P1̄ (no. 2), a = 10.749(5) Å, b = 11.074(5) Å, c = 15.951(7) Å, α = 80.471(8)°, β = 80.987(8)°, γ = 77.283(8)°, V = 1812.3(14) Å3, Z = 2, R
gt(F) = 0.0465, wR
ref(F
2) = 0.1279, T = 296(2) K.
Crystal structure of 6-hydroxy-4,8,11b-trimethyltetradecayhdro-8,11-epoxy-6a,9-methanocyclohepta[a]naphthalene-4-carboxylic acid – methanol (1/1), C20H30O4
Authors: Zou Juan , Tang Tian-Tian , Ye Jiang-Hai , Zhao Chen-Liang , He Kang , Pan Lu-Tai 
Published: April 2019

Abstract
C20H30O4, orthorhombic, P21212 (no. 18), a = 12.6727(4) Å, b = 19.8422(7) Å, c = 7.5471(3) Å, V = 1897.75(12) Å3, Z = 2, Rgt
(F) = 0.0448, wR
ref(F
2) = 0.1311, T = 243(2) K.
Crystal structure of hemikis(cyclohexane-1,4-diammonium) (pyridine-2-carboxylate), [C6H16N2]0.5[C6H4NO2]
Authors: Tan Sang Loon , Tiekink Edward R.T. 
Published: April 2019

Abstract
[C6H16N2]0.5[C6H4NO2], triclinic, P1̄ (no. 2), a = 6.7956(2) Å, b = 7.2840(3) Å, c = 10.2615(4) Å, α = 70.483(3)°, β = 80.902(3)°, γ = 66.404(3)°, V = 438.55(3) Å3, Z = 2, R
gt(F) = 0.0359, wR
ref(F
2) = 0.0988, T = 100(2) K.
Crystal structure of catena-poly[(μ2-azido-κ2
N:N)(μ2-4-cyanobenzoato-κ2
O:O′)-(μ2-methanol-κ2
O:O)copper(II)], C9H8CuN4O3
Authors: Li Dong , Deng Ping-Ping , Wu Li 
Published: April 2019

Abstract
C9H8CuN4O3, triclinic, P1̄ (no. 2), a = 6.3568(4) Å, b = 8.8323(6) Å, c = 10.8584(7) Å, α = 103.891(1)°, β = 94.868(1)°, γ = 105.453(1)°, V = 563.16(6) Å3, Z = 2, R
gt(F) = 0.0245, wR
ref(F
2) = 0.0701, T = 296(2) K.
Crystal structure of chlorido-4-fluorobenzyl-bis(2-methylquinolin-8-olato-κ2
N,O)tin(IV), C27H22ClFN2O2Sn
Authors: Lee See Mun , Lo Kong Mun , Tiekink Edward R.T. 
Published: April 2019

Abstract
C27H22ClFN2O2Sn, tetragonal, P41 (no. 76), a = 9.38970(10) Å, c = 26.2753(4) Å, V = 2316.60(6) Å3, Z = 4, R
gt(F) = 0.0141, wR
ref(F
2) = 0.0381, T = 293(2) K.
Measurement and classification of human characteristics and capabilities during interaction tasks
Authors: Villani Valeria , Czerniak Julia N. , Sabattini Lorenzo , Mertens Alexander , Fantuzzi Cesare 
Published: April 2019

Abstract
In this paperwe address the need to design adaptive interacting systems for advanced industrial production machines. Modern production systems have become highly complex and include many subsidiary functionalities, thus making it difficult for least skilled human operators interact with them. In this regard, adapting the behavior of the machine and of the operator interface to the characteristics of the user allows a more effective interaction process, with a positive impact on manufacturing efficiency and user’s satisfaction. To this end, it is crucial to understandwhich are the user’s capabilities that influence the interaction and, hence, should be measured to provide the correct amount of adaptation.Moving along these lines, in this paper we identify groups of users that, despite having different individual capabilities and features, have common needs and response to the interaction with complex production systems. As a consequence,we define clusters of users that have the same need for adaptation. Then, adaptation rules can be defined by considering such users’ clusters, rather than addressing specific individual user’s needs.
Effects of MAH/St grafted nanocellulose on the properties of carbon reinforced styrene butadiene rubber
Authors: Xu Yingni , Li Caixin , Gu Ju 
Published: April 2019

Abstract
Nanocellulose was extracted from bagasse (bagasse nanocellulose, BNC) by hydrolysis with alkali and acid, then grafted by maleic anhydride (MAH) and styrene (St). The modified nanocellulose (BMS) was further investigated to partially replace carbon black (CB) in St butadiene rubber (SBR) composites via coagulation to prepare SBR/BMS/CB composites. Through the comparison of the vulcanization characteristics, processing properties, mechanical properties, and dynamic mechanical performance of them, BMS proved to be more efficient than BNC. The results showed that BMS could activate the vulcanization process, suppress the Payne effect, and increase the modulus and hardness. Moreover, a fine BMS dispersion and strong interfacial interaction were achieved in SBR/BMS/CB composites. The observed reinforcement effects were evaluated based on the results of G′, tanδ and scanning electron microscopy (SEM) analyses of SBR/BMS/CB in comparison with SBR/BNC/CB composites.
Cheminformatics techniques in antimalarial drug discovery and development from natural products 1: basic concepts
Authors: Egieyeh Samuel , Malan Sarel F. , Christoffels Alan 
Published: April 2019

Abstract
A large number of natural products, especially those used in ethnomedicine of malaria, have shown varying in vitro antiplasmodial activities. Facilitating antimalarial drug development from this wealth of natural products is an imperative and laudable mission to pursue. However, limited manpower, high research cost coupled with high failure rate during preclinical and clinical studies might militate against the pursuit of this mission. These limitations may be overcome with cheminformatic techniques. Cheminformatics involves the organization, integration, curation, standardization, simulation, mining and transformation of pharmacology data (compounds and bioactivity) into knowledge that can drive rational and viable drug development decisions. This chapter will review the application of cheminformatics techniques (including molecular diversity analysis, quantitative-structure activity/property relationships and Machine learning) to natural products with in vitro and in vivo antiplasmodial activities in order to facilitate their development into antimalarial drug candidates and design of new potential antimalarial compounds.
A response surface model of morphological changes in UO₂ and U₃O₈ following high temperature aging
Authors: Olsen Adam M. , Schwerdt Ian , Jolley Alex , Halverson Nick , Richards Bryony , McDonald IV Luther W. 
Published: April 2019

Abstract
The morphological changes that take place during the processing and storage of uranium oxides can provide valuable information on the processing history and storage conditions of an interdicted sample. In this study microstructural changes in two uranium oxides (UO2 and U3O8) due to changes in the aging conditions at elevated temperatures were quantified and modeled using a response surface methodology approach. This allowed the morphological changes to be used as a signature for the aging conditions for nuclear forensic analysis. A Box-Behnken design of experiment was developed using the independent variables: temperature from 100 to 400 °C, aging times from 2 to 48 h, and partial pressure of

O
2

(

P

O
2

)

${{\rm{O}}_2}({{\rm{P}}_{{{\rm{O}}_{\rm{2}}}}})$

between ~0.0 kPa and 21.3 kPa. The design of experiment consisted of 54 samples per uranium oxide. Each aged sample was characterized using scanning electron microscopy (SEM) for image analysis. Utilizing the Morphological Analysis for Materials (MAMA) software package, particle size and shape were quantified using the acquired SEM images. Analysis of the particle attributes was completed using the Kolmogorov–Smirnov two sample test (K–S test) to determine if the particle size and shape distributions were statistically distinct. This data was then used to create response surfaces of the quantitative morphological changes based on the developed design of experiment. The U3O8 samples showed no statistically quantifiable differences due to the aging conditions. However, the UO2 samples had distinct morphological changes due to the experimental aging conditions. Specifically, the temperature factor had an increasing effect on the particle area, and a decreasing effect on particle circularity.
An investigation of effects of level density models and gamma ray strength functions on cross-section calculations for the production of 90Y, 153Sm, 169Er, 177Lu and 186Re therapeutic radioisotopes via (n,γ) reactions
Authors: Şekerci Mert , Özdoğan Hasan , Kaplan Abdullah 
Published: April 2019

Abstract
One of the methods used to treat different cancer diseases is the employment of therapeutic radioisotopes. Therefore, many clinical, theoretical and experimental studies are being carried out on those radioisotopes. In this study, the effects of level density models and gamma ray strength functions on the theoretical production cross-section calculations for the therapeutic radioisotopes 90Y, 153Sm, 169Er, 177Lu and 186Re in the (n,γ) route have been investigated. TALYS 1.9 code has been used by employing different level density models and gamma ray strength functions. The theoretically obtained data were compared with the experimental data taken from the literature. The results are presented graphically for better interpretation.
The initial evaluation of performance of hard anti-wear coatings deposited on metallic substrates: thickness, mechanical properties and adhesion measurements – a brief review
Authors: Łępicka Magdalena , Grądzka-Dahlke Małgorzata 
Published: April 2019

Abstract
The demand for metallic materials of exceptional tribological performance is rapidly growing due to constant development of automotive, tool or implant industry. As great attention nowadays is being paid to the surfacemodified materials, there is a need of establishing reliable methods for evaluation of coated metallic alloys. In this paper, methods for thickness, adhesion and mechanical properties measurement of anti-wear coatings are considered. The importance of altering the mechanical properties of the coating with regards to its expected wear performance is also discussed. According to the numerous findings, it is reasonable to pay attention to the hardness and Young’s modulus of the developed coating, as well as on the mismatch between its Young’s modulus and the elastic modulus of the substrate material. Information provided in this paper has been thoroughly illustrated and enriched with our own experience in the field.
Experimental review of thermal analysis of dissimilar welds of High-Strength Steel
Authors: Bayock Francois Njock , Kah Paul , Mvola Belinga , Layus Pavel 
Published: April 2019

Abstract
Dissimilar welding offers exiting benefits for a wide range of engineering applications, such as automotive bodies, piping systems of nuclear power plants, health equipment. The main advantages of dissimilarwelding applications areweight reductions, lower costs, unique properties combinations, and improved energy-efficiency. The properties of dissimilar weld depend on the type of welding process used, the accuracy of the process parameters control, the characteristics of the base metal and the heat treatment procedures. The current study reviews the scientific literature on the topic of thermal analysis of dissimilar high-strength steels (HSS) welding. The review of experimental data was carried out to analyze the variable heat input effect on dissimilar welds. The results indicate the welds mechanical properties irregularity and reduction in toughness and tensile strength due to uneven changes in the microstructure. Furthermore, postweld heat treatment (PWHT) often resulted in the formation of intermetallic compounds whose properties are dependent on the duration of treatment. The research results can be used to optimize the heat input of the HSS welding process.
Freeze-Thaw Resistance of Cement Screed with Various Supplementary Cementitious Materials
Authors: Reiterman Pavel , Holčapek Ondřej , Zobal Ondřej , Keppert Martin 
Published: April 2019

Abstract
This paper describes a study of the effect of partial replacement of ordinary Portland cement (OPC) by various mineral additives in the screed mixtures. Ceramic powder, blast furnace slag and fly ash were gradually employed in increments of 12.5 wt.% up to 50 wt.% to replace OPC. The mixtures were designed to a constant consistency. The influence of mineral additives was evaluated in terms of the air content in the fresh mixtures, the compressive strength, the flexural strength and the freeze-thaw resistance and using non-destructive measurements after 28 and 90 days. The accompanied paste sampleswere analysed using thermogravimetry to monitor the hydration process by means of total bound water content. The decrease in the mechanical properties and the frost resistance of the mixtures with the mineral additives were recorded, because of the necessity for a larger addition of water. According to the valid standards for concrete screed related to the frost resistance, it could be concluded that maximal suitable cement replacement contents are 12.5, 37.5 and 50 wt.% for ceramic powder, fly ash and blast furnace slag, respectively. The freeze-thaw resistance of the studied materials was found to be strongly related to the content of CSH and CAH hydrates.
Preparation of POSS-triol/wollastonite composite particles by Liquid phase mechanochemical method and its application in UV curable coatings
Authors: Chen Qishen , Xue Feng , Ding Enyong 
Published: April 2019

Abstract
POSS-coated wollastonite composite particles were prepared by the liquid phase mechano-chemical grinding of wollastonite and POSS powder together in the high pressure homogenizer [1, 2, 3, 4] for the first time. And then we prepare UV curable coatings of vinyl trimethoxy silane(VTMS) / butyl acrylate (BA) with different content of composite particles [5]. Nuclear magnetic resonance spectroscopy, scanning electron microscopy and infrared spectra were used to investigate the microstructures and morphologies of the composite. The properties of the coatings are tested by FTIR, SEM, water contact angles and so on. The results indicate that the POSS was successfully loaded on the surface of silica fume to prepare composite particles and when the addition of the composite particles is 12%, the water contact angle of the UV curable coating reaches 151.96∘, and the mechanical properties of the coating are also qualified.
Sulfur-33 NQR investigation of the electric-field-gradient tensor in an organosulfur compound
Authors: Yamada Kazuhiko , Aoki Daisuke , Nakazono Kazuko , Takata Toshikazu 
Published: April 2019

Abstract

33S nuclear quadrupole resonance (NQR) frequencies of 33S-enriched S-4-phenyl 4-toluenethiosulfonate were observed in the range of 22.96–23.31 MHz at temperatures between 110 and 300 K. A single sharp signal was observed at all the temperatures. The two-dimensional (2D) nutation echo method was applied at 150 K, providing the 33S electric field gradient (EFG) tensor information, the quadrupolar coupling constant, C
Q, of 42.3 MHz and the asymmetry parameter, ηQ, of 0.80(9). Quantum chemical calculations were performed to obtain the 33S EFG tensor orientations with respect to the molecular frame.
Preparation, Physical Characterization and Adsorption Properties of Synthesized Co–Ni–Cr Nanocomposites for Highly Effective Removal of Nitrate: Isotherms, Kinetics and Thermodynamic Studies
Authors: Rahdar Somayeh , Rahdar Abbas , Ahmadi Shahin , Mehdizadeh Zhara , Taghavi Mahmoud 
Published: April 2019

Abstract
In the current effort, the Co–Ni–Cr Nanocomposites were synthesized by chemical method and characterized by means of scanning electron micrographs (SEM), X-ray diffraction (XRD), Fourier trans from infra-red (FTIR), and vibration sample magnetization (VSM). In the final step, these nanoparticles were used to study the nitrate removal efficiency from aqueous solution. The effect of important factor including pH, concentration of Nitrate (NO3
−) ion, contact time and nanoparticle dose were studied in order to find the optimum adsorption conditions. A maximum of removal of the nitrate was observed at pH 4, initial concentration of 40 mg L−1, amount of nanoparticle of 0.06 g L−1 and contact time 60 min. The adsorption isotherm values were obtained and analyzed using the Langmuir, Frenudlich, Temkin and Dubinin–Radushkevich equations, the Temkin isotherm being the one that showed the best correlation coefficient (R2 = 0.999). In addition to, the adsorption kinetics studied by the pseudo-first-order, pseudo-second-order, Elovich model, Ritchie and intraparticle diffusion models. The experimental data fitted to pseudo-second-order (R2 = 0.999).
THE IMPLANTATION OF CHARACTER VALUES TOWARD STUDENTS THROUGH CONGKAK GAME FOR MATHEMATICS INSTRUCTIONAL MEDIA
Authors: Agusti Fardatil Aini , Zafirah Afifah , Engkizar Engkizar , Anwar Fuady , Arifin Zainul , Syafril Syafrimen 
Published: April 2019

This research aims to investigate character values that can be applied on students through congkak game as it is used as a media of mathematics learning. This study used qualitative and quantitative combination or (Exploratory mixed methods designs). The first phase of qualitative data was taken through in-depth interviews to 5 selected informants using purposive sampling technique. The first phase of the data retrieval was intended to gather information related to the content of character values contained in congkak game. All data interviews were analyzed thematically using NVivo qualitative analysis tool 10. Then, the second phase of the data was taken using a questionnaire to 46 students who were studying in grade V and VI in an elementary school (SD). The second phase of the data retrieval was intended to support the first phase of the research results, the entire data of the second phase analyzed descriptively using quantitative analysis tools SPSS Windows 18.0. Overall, the results of the two phases indicated that there were nine character values contained in the game congkak once it was used as a medium of mathematics learning. The nine-character values were honesty, discipline, hard working, creativity, curiosity, independent, communicativeness, responsibility and appreciation for achievements. The results also proved that the use of instructional media such as traditional game congkak can be used as an intermediary that can be used by teachers in mathematics learning process. In addition, this study shows that even though congkak game belongs to a traditional game among middle societies, in fact, there were characters values as it was investigated scientifically.
HUBUNGAN PERILAKU POSITIF DALAM PRAKTIKUM DAN KETERLAKSANAAN BIMBINGAN KARIR DENGAN KESIAPAN BERKARIR DI DUNIA INDUSTRI SISWA SMKN KELAS XII PROGRAM KEAHLIAN MULTIMEDIA DI KOTA MALANG
Authors: Kholifah Annisa Dwi Nur , Putro Setiadi Cahyono , Rahmawati Yuni 
Published: April 2019

Penelitian ini bertujuan untuk mengungkap signifikansi hubungan antara perilaku positif dalam praktikum (X1)dan keterlaksanaan bimbingan karir (X2)secara simultan terhadap kesiapan berkarir di dunia industri dan besar kontribusinya. Jumlah sampel sebanyak 157 siswa dengan menggunakan teknik simple random sampling. Pengambilan data menggunakan kuesioner tertutup yang telah memenuhi kriteria validitas dan reliabilitas. Teknik analisis data menggunakan analisis regresi ganda. Hasil dari penelitian ini adalah terdapat hubungan yang positif dan signifikan antara (X1) dan (X2) terhadap (Y) secara simultan dengan nilai psig < pstandart yaitu 0,000 < 0,05. Besarnya kontribusi (X1) dan (X2) terhadap (Y) sebesar 14,00% dengan persamaan garis regresi Y= 12,496 + 0,276X1 + 0,359X2.
PENGARUH MEDIA VISUAL MENGGUNAKAN APLIKASI LECTORA INSPIRE TERHADAP HASIL BELAJAR PESERTA DIDIK SISWA KELAS XI DI SMA ISLAM SUNAN GUNUNG JATI NGUNUT TAHUN PELAJARAN 2017/2018
Authors: Ngubaidillah Ahmad , Kartadie Rikie 
Published: April 2019

Abstract. Improving the quality of learning is one of the basic, improvement of education as a whole. Efforts to improve the quality of education into an inte­grated part of efforts to improve human quality, both aspects of ability, per­sonality, and responsibility. One to improve the quality of the learning process is by using an effective media, attract students to learn and explain thoroughly the material to be delivered so that in the end can improve student learning outcomes.The design of this research is Quasi-Experimental Design with Research model of Nonequivalent Pretest-Postest Control Group Design. The sample of the re­search are 60 students selected by Sample Random Sampling. Data analysis was done with parametric statistic with the prerequisite test included a normality test, homogeneity test, then tested different and influence test.The result showed that the average score of the control group was 70.61, for the experimental group the average score was 74.81. There is the difference of result of student learning between the control group and experiment group after learning using visual media using Lectora application and result of influence test show result of t-count 3,621> t-table equal to 2,052 with it can be concluded that there the influence of learning result after given treatment.
PENGARUH PENGGUNAAN DESAIN PEMBELAJARAN ELPSA DALAM MODEL PEMBELAJARAN VAK TERHADAP HASIL BELAJAR KIMIA SISWA PADA POKOK BAHASAN LARUTAN ELEKTROLIT DAN NON ELEKTROLIT
Authors: Kusumawardani Ratna , Pratiwi Ajeng Hayu , Muflihah Muflihah 
Published: April 2019

Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan desain pembelajaran ELPSA dalam model pembelajaran VAK terhadap hasil belajar kimia siswa pada pokok bahasan larutan elektrolit dan non elektrolit kelas X SMA Negeri 3 Samarinda. Teknik pengambilan sampel yang digunakan adalah purposive sampling sehingga diperoleh sampel penelitian yaitu siswa kelas X MIPA 1 dan X MIPA 2 dengan masing-masing kelas berjumlah 36 siswa. Kelas X MIPA 2 merupakan kelas yang menggunakan desain pembelajaran ELPSA dalam model pembelajaran VAK sedangkan kelas X MIPA 1 menggunakan model pembelajaran VAK. Hasil penelitian menunjukkan bahwa rata-rata nilai hasil belajar siswa yang menggunakan desain pembelajaran ELPSA dalam model pembelajaran VAK lebih baik daripada rata-rata hasil belajar siswa yang menggunakan model pembelajaran VAK. Rata-rata nilai hasil belajar siswa yang menggunakan desain pembelajaran ELPSA dalam model VAK adalah 81,06 dan rata-rata hasil belajar siswa yang menggunakan model pembelajaran VAK adalah 78,32. Berdasarkan hasil analisis dengan menggunakan uji t, diperoleh t hitung = 2,68 dan t tabel = 1,99 pada taraf signifikan 5%. Karena t hitung > t tabel, maka H diterima sehingga terdapat pengaruh penggunaan desain pembelajaran ELPSA dalam model pembelajaran VAK terhadap hasil belajar kimia siswa pada pokok bahasan larutan elektrolit dan non elektrolit kelas X SMA Negeri 3 Samarinda.