bluuebunny/crossref_metadata_2025 huggingface dataset:
Multiple processes acting from local to large geographical scales shape bacterial communities associated with Phormidium (cyanobacteria) biofilms in French and New Zealand rivers
Authors: Echenique-Subiabre Isidora , Zancarini Anouk , Heath Mark W. , Wood Susanna A. , Quiblier Catherine , Humbert Jean-François
Published: September 2018

River biofilms dominated byPhormidium(cyanobacteria) are receiving increased attention worldwide because of a recent expansion in their distribution and their ability to produce neurotoxins leading to animal mortalities. Limited data are available on the composition and structure of bacterial communities (BCs) associated withPhormidiumbiofilms despite the important role they potentially play in biofilm functioning. By using a high-throughput sequencing approach, we compared the BCs associated withPhormidiumbiofilms in several sampling sites of the Tarn River (France) and in eight New Zealand rivers. The structure of the BCs from both countries displayed spatial and temporal variations but were well conserved at the order level and 28% of the OTUs containing 90% of the reads were shared by these BCs. This suggests that micro-environmental conditions occurring within thickPhormidiumbiofilms strongly shape the associated BCs. A strong and significant distance-decay relationship (rp = 0.7; P = 0.001) was found in BCs from New Zealand rivers but the Bray-Curtis dissimilarities between French and New Zealand BCs are in the same order of magnitude of those found between New Zealand BCs. All these findings suggest that local environmental conditions seem to have more impact on BCs than dispersal capacities of bacteria.
Scanning Acoustic Microscopy and Time-Resolved Fluorescence Spectroscopy for Characterization of Atherosclerotic Plaques
Authors: Bilen Bukem , Gokbulut Belkis , Kafa Ulku , Heves Emre , Inci Mehmet Naci , Unlu Mehmet Burcin
Published: September 2018

Atherosclerotic plaques constitute the primary cause of heart attack and stroke. However, we still lack a clear identification of the plaques. Here, we evaluate the feasibility of scanning acoustic microscopy (SAM) and time-resolved fluorescence spectroscopy (TRFS) in atherosclerotic plaque characterization. We perform dual-modality microscopic imaging of the human carotid atherosclerotic plaques. We first show that the acoustic impedance values are statistically higher in calcified regions compared with the collagen-rich areas. We then use CdTe/CdS quantum dots for imaging the atherosclerotic plaques by TRFS and show that fluorescence lifetime values of the quantum dots in collagen-rich areas are notably different from the ones in calcified areas. In summary, both modalities are successful in differentiating the calcified regions from the collagen-rich areas within the plaques indicating that these techniques are confirmatory and may be combined to characterize atherosclerotic plaques in the future.
A novel class of oxynitrides stabilized by nitrogen dimer formation
Authors: Kim Sangtae , Gwon Hyo Jin , Paek Sung Wook , Kim Seong Keun , Choi Ji-Won , Kim Jin-Sang , Choi Jung-Hae , Kang Chong-Yun , Baek Seung-Hyub
Published: September 2018

Despite the wide applicability of oxynitrides from photocatalysis to refractory coatings, our understanding of the materials has been limited in terms of their thermodynamics. The configurational entropy via randomly mixed O/N or via cation vacancies are known to stabilize oxynitrides, despite the positive formation enthalpies. Here, using tin oxynitrides as a model system, we show byab initiocomputations that oxynitrides in seemingly charge-unbalanced composition stabilize by forming pernitrides among metal-(O,N)6octahedra. The nitrogen pernitride dimer, =(N-N)=, results in the effective charge of −4, facilitating the formation of nitrogen-rich oxynitrides. We report that the dimer forms only in structures with corner-sharing octahedra, since the N-N bond formation requires sufficient rotational degrees of freedom among the octahedra. X-ray photoemission spectra of the synthesized tin oxynitride films reveal two distinct nitrogen bonding environments, confirming the computation results. This work opens the search space for a novel kind of oxynitrides stabilized by N dimer formation, with specific structural selection rules.
Directed sortase A evolution for efficient site-specific bioconjugations in organic co-solvents
Authors: Zou Zhi , Alibiglou Hoda , Mate Diana M. , Davari Mehdi D. , Jakob Felix , Schwaneberg Ulrich
Published: September 2018

Evolved sortase A variants enable efficient site-specific bioconjugations in organic co-solvents.
One-pot synthesis of D–π–D–π–D type hole-transporting materials for perovskite solar cells by sequential C–H (hetero)arylations
Authors: Lu Kuan-Ming , Lee Kun-Mu , Lai Chia-Hsin , Ting Chang-Chieh , Liu Ching-Yuan
Published: September 2018

D–π–D–π–D oligoaryls are facilely synthesized through consecutive C–H arylations, exhibiting up to 15.4% PCE when fabricated in perovskite solar cells as hole transporters.
Senescence-associated sialidase revealed by an activatable fluorescence-on labeling probe
Authors: Zhu Rui , Wang Siyu , Xue Zhongwei , Han Jiahuai , Han Shoufa
Published: September 2018

A fluorescence-quenched substrate of sialidase enables fluorescence-on live cell imaging of sialidases, revealing up-regulation of lysosome-associated sialidase in cell senescence.
Cu3L2 metal–organic cages for A3-coupling reactions: reversible coordination interaction triggered homogeneous catalysis and heterogeneous recovery
Authors: Chen Gong-Jun , Chen Chao-Qun , Li Xue-Tian , Ma Hui-Chao , Dong Yu-Bin
Published: September 2018

A novel Cu3L2 metal–organic cage, which features coordination interaction triggered solubility, can be a highly active and reusable catalyst to homogeneously catalyse the one-pot aldehyde–alkyne–amine A3-coupling reaction.
Catalytic CO oxidation on B-doped and BN co-doped penta-graphene: a computational study
Authors: Krishnan Ranganathan , Wu Shiuan-Yau , Chen Hsin-Tsung
Published: September 2018

The catalytic reaction of carbon monoxide oxidation on boron-doped and boron–nitrogen co-doped penta-graphene materials has been systematically studied by utilizing spin-polarized density functional theory (DFT) calculations.
Halogen bond shortens and strengthens the bridge bond of [1.1.1]propellane and the open form of [2.2.2]propellane
Authors: Joy Jyothish , Akhil Edakkandy , Jemmis Eluvathingal D.
Published: September 2018

The electron scavenger property of halogen bond donors is employed to stabilize the bridge-bond of [1.1.1]propellane and o-[2.2.2]propellane.
Photoelectron spectroscopy and thermochemistry of o-, m-, and p-methylenephenoxide anions
Authors: Nelson Daniel J. , Gichuhi Wilson K. , Nichols Charles M. , Bierbaum Veronica M. , Lineberger W. Carl , Lehman Julia H.
Published: September 2018

The photoelectron spectra of methylenephenoxide distonic radical anions yield significant spectroscopic and thermodynamic information about the corresponding neutral diradicals.
Recent advances in the syntheses and properties of polynitrogen pentazolate anion cyclo-N5− and its derivatives
Authors: Wang Pengcheng , Xu Yuangang , Lin Qiuhan , Lu Ming
Published: September 2018

This review summarizes recent developments and advances in pentazole chemistry, including substituted-pentazole precursors, strategies for the preparation of pentazolate anion, derivatives of pentazolate anion and their bonding properties.
From fundamentals to applications: a toolbox for robust and multifunctional MOF materials
Authors: Kirchon Angelo , Feng Liang , Drake Hannah F. , Joseph Elizabeth A. , Zhou Hong-Cai
Published: September 2018

A packaged toolbox with stabilization and functionalization strategies for robust and multifunctional metal–organic framework (MOF) materials has been summarized and discussed.
Two-step synthesis of hole structure bastnasite (RECO3F RE = Ce, La, Pr, Nd) sub-microcrystals with tunable luminescence properties
Authors: Dong Jianchao , Wang Xiaoxue , Song Lina , Yang Junfeng , Wu Hongyue , Yang Chunming , Gan Shucai
Published: September 2018

A two-step synthetic route using RE(OH)CO3 colloid spheres as the sacrificial template was designed to prepare monodisperse, pure bastnasite (RECO3F: RE = Ce, La, Pr, Nd) with a hole structure for the first time.
Blueberry extract promotes longevity and stress toleranceviaDAF-16 inCaenorhabditis elegans
Authors: Wang Huailing , Liu Jie , Li Tong , Liu Rui Hai
Published: September 2018

Blueberry is rich in bioactive phytochemicals with a wide of range of biological activities and health benefits.
Solvothermal liquefaction of alkali lignin to obtain a high yield of aromatic monomers while suppressing solvent consumption
Authors: Riaz Asim , Verma Deepak , Zeb Hassan , Lee Jeong Hyeon , Kim Jin Chul , Kwak Sang Kyu , Kim Jaehoon
Published: September 2018

The use of formic acid leads to the complete decomposition of alkali lignin and affords high-yield aromatic monomers, while at the same time suppress consumption of solvent used for the lignin conversion.
Electrooxidation of sulfate paired to electroreduction of copper for regeneration of persulfate/sulfuric acid etching solution
Authors: Zhou Mingming , Li Chaolin , Luo Haijian , Wang Jingwen , Sun Xue
Published: September 2018

A laboratory scale closed-loop cycle system for the complete regeneration of sodium persulfate/sulfuric acid etching solution (SPS) has been developed by anode oxidation of sulfate paired to cathode reduction of copper.
Measurement and mitigation of free convection in microfluidic gradient generators
Authors: Gu Yang , Hegde Varun , Bishop Kyle J. M.
Published: September 2018

Microfluidic gradient generators are used to study the movement of living cells, lipid vesicles, and colloidal particles in response to spatial variations in their local chemical environment.
Systematic analysis of synergistic proteome modulations in a drug combination of cisplatin and MLN4924
Authors: Megger Dominik Andre , Abou-Eid Shadi , Zülch Birgit , Sitek Barbara
Published: September 2018

Quantitative proteomics reveals synergistic proteome modulations in the drug combination of MLN4924 and cisplatin.
Rapid determination and conversion study of 5-hydroxymethylfurfural and its derivatives in glucose injection
Authors: Wang Cheng , Hou Yajing , Lin Yuanyuan , Xie Yitong , Wei Di , Zhou Nan , He Huaizhen
Published: September 2018

5-HMF and two identified additional derivatives (II, III) in glucose injection were rapidly separated in less than 7 min for the first time by our normal phase high performance liquid chromatography. The results were more precise than the method adopted by pharmacopeias.
Covalent attachment of a fluorescent ‘Pourbaix sensor’ onto a polymer bead for sensing in water
Authors: Vella Refalo Matthew , Spiteri Jake C. , Magri David C.
Published: September 2018

A covalently immobilised 4-amino-1,8-naphthalimide AND logic gate, responsive to acidity and oxidisability, emits a green fluorescence on a Tentagel solid support.
Application of the UHPLC method for separation and characterization of major photolytic degradation products of trazodone by LC-MS and NMR
Authors: Thummar Mohit , Patel Prinesh N. , Kushwah Bhoopendra Singh , Samanthula Gananadhamu
Published: September 2018

This article is about the characterization of degradation products of trazodone which is used in the treatment of depression.
NMOF self-templating synthesis of hollow porous metal oxides for enhanced lithium-ion battery anodes
Authors: Dang Rui , Jia Xilai , Wang Peng , Gao Hongyi
Published: September 2018

Hollow porous Fe2O3 hexagonal nanorods were fabricated via a facile approach using MOFs as the precursors and sacrificial templates.
High efficiency MAPbI3−xClx perovskite solar cell via interfacial passivation
Authors: Yuan Sijian , Wang Jiao , Yang Kunlong , Wang Pengfei , Zhang Xin , Zhan Yiqiang , Zheng Lirong
Published: September 2018

The trap states at the interface between perovskite and charge-transport layer have a great influence on the performance of perovskite solar cells.
Multi-segmented CdS–Au nanorods for electrochemiluminescence bioanalysis
Authors: Huo Xiao-Lei , Yang Hui , Li Mei-Xing , Zhao Wei , Xu Jing-Juan , Wang Ying , Luo Xi-Liang , Chen Hong-Yuan
Published: September 2018

Based on multi-segmented CdS–Au nanorod arrays, a sandwich ECL sensor for sensitive detection of cancer biomarkers was developed.
Manganese hexacyanoferrate/graphene cathodes for sodium-ion batteries with superior rate capability and ultralong cycle life
Authors: Shen Zhilong , Sun Yunpo , Xie Jian , Liu Shuangyu , Zhuang Dagao , Zhang Genlin , Zheng Wenquan , Cao Gaoshao , Zhao Xinbing
Published: September 2018

A manganese hexacyanoferrate/graphene hybrid exhibits a high capacity, excellent rate capability and ultralong high-rate cycle life.
Antidepressant activity of an aqueous extract from okra seeds
Authors: Xia Fangbo , Li Chenchen , Li Mengqiu , Liao Yonghong , Liu Xinmin , Si Jianyong , Chang Qi , Pan Ruile
Published: September 2018

Faced with the increasing incidence of major depression disorder (MDD) and the unsatisfactory effect of current drugs, there has been growing attention on the relation between dietary supplements and MDD prevention.
Dual release kinetics in a single dosage from core–shell hydrogel scaffolds
Authors: Khan Finaz , Bera Debbethi , Palchaudhuri Santanu , Bera Rajesh , Mukhopadhyay Madhumita , Dey Anindita , Goswami Soumyabrata , Das Susmita
Published: September 2018

A single LMW gelator based core–shell hydrogel with dual release kinetics.
Comparison of the physical and thermodynamic stability of amorphous azelnidipine and its coamorphous phase with piperazine
Authors: Du Shuang , Li Wen Sheng , Wu Ya Rong , Fu Yan , Yang Caiqin , Wang Jing
Published: September 2018

The thermodynamic stabilities of an amorphous phase and a coamorphous phase of azelnidipine in 0.01 M HCl medium were investigated using a solution chemistry method.
Synthesis and characterization of amorphous precipitated silica from alkaline dissolution of olivine
Authors: Raza Nadeem , Raza Waseem , Madeddu Silvia , Agbe Henry , Kumar R. V. , Kim Ki-Hyun
Published: September 2018

The high worldwide demand for amorphous precipitated silica (APS) materials, millions of tons worth billions of dollars, makes it worthwhile to further expand the techniques for synthesizing new, cheap, and environmentally friendly resources.
Preparation of chiral 3-oxocycloalkanecarbonitrile and its derivatives by crystallization-induced diastereomer transformation of ketals with chiral 1,2-diphenylethane-1,2-diol
Authors: Yamashita Yohei , Maki Daisuke , Sakurai Shiho , Fuse Takumi , Matsumoto Shoji , Akazome Motohiro
Published: September 2018

Chiral 3-oxocyclopentanecarbonitrile was prepared in good yield and with high diastereoselectivity by crystallization-induced diastereomer transformation of the corresponding diastereomeric ketal.
Experimental and computational preference for phosphine regioselectivity and stereoselective tripodal rotation in HOs3(CO)8(PPh3)2(μ-1,2-N,C-η1,κ1-C7H4NS)
Authors: Begum Shahin A. , Chowdhury Md. Arshad H. , Ghosh Shishir , Tocher Derek A. , Richmond Michael G. , Yang Li , Hardcastle K. I. , Rosenberg Edward , Kabir Shariff E.
Published: September 2018

The site preference for PPh3substitution in HOs3(CO)10(PPh3)2(μ-1,2-N,C-η1,κ1-C7H4NS) (1) has been investigated.
Acylhydrazone functionalized benzimidazole-based metallogel for the efficient detection and separation of Cr3+
Authors: Yao Hong , Wang Jiao , Zhou Qi , Guan Xiao-Wen , Fan Yan-Qing , Zhang You-Ming , Wei Tai-Bao , Lin Qi
Published: September 2018

The novel gelator BM could self-assemble into the supramolecular organogel BMG and form the metallogel BMG-Fe with Fe3+ in glycerol. BMG-Fe exhibits superior absorption, removal capacity and selective detection for Cr3+.
Efficient intermediate-temperature steam electrolysis with Y : SrZrO3–SrCeO3 and Y : BaZrO3–BaCeO3 proton conducting perovskites
Authors: Leonard Kwati , Okuyama Yuji , Takamura Yasuhiro , Lee Young-Sung , Miyazaki Kuninori , Ivanova Mariya E. , Meulenberg Wilhelm A. , Matsumoto Hiroshige
Published: September 2018

Proton conducting Ba(Zr0.5Ce0.4)8/9Y0.2O2.9 is employed as a potential steam electrolysis electrolyte for hydrogen production at intermediate temperature.
Metallic layered germanium phosphide GeP5 for high rate flexible all-solid-state supercapacitors
Authors: Yang Bingchao , Nie Anmin , Chang Yukai , Cheng Yong , Wen Fusheng , Xiang Jianyong , Li Lei , Liu Zhongyuan , Tian Yongjun
Published: September 2018

In this study, high quality GeP5 crystals with two-dimensional (2D) layered structures and novel electrical conductivity of 2.4 × 106 S m−1 have been prepared under high-temperature high-pressure oriented growth technique (HTHP-OGT).
Sharp Cu@Sn nanocones on Cu foam for highly selective and efficient electrochemical reduction of CO2 to formate
Authors: Chen Chengzhen , Pang Yuanjie , Zhang Fanghua , Zhong Juhua , Zhang Bo , Cheng Zhenmin
Published: September 2018

Electrochemical reduction of aqueous CO2 into formate is subject to poor selectivity and low current density with conventional Sn-based catalysts owing to the inert nature of CO2 molecules and the low number of active sites.
Highly conductive and bendable gold networks attached on intertwined cellulose fibers for output controllable power paper
Authors: Zhang Yan , Yang Hongmei , Cui Kang , Zhang Lina , Xu Jinmeng , Liu Hong , Yu Jinghua
Published: September 2018

Paper-based gold networks obtained by a double bottom-up growth strategy enables low-cost fabrication of flexible electronics.
The researcher's guide to solid-state dye-sensitized solar cells
Authors: Benesperi Iacopo , Michaels Hannes , Freitag Marina
Published: September 2018

Solid-state dye-sensitized solar cell components, materials, architectures and interfaces are comprehensively reviewed.
Correction: A selectively processible instant glue passivation layer for indium gallium zinc oxide thin-film transistors fabricated at low temperature
Authors: Yoo Hyukjoon , Tak Young Jun , Kim Won-Gi , Kim Yeong-gyu , Kim Hyun Jae
Published: September 2018

Correction for ‘A selectively processible instant glue passivation layer for indium gallium zinc oxide thin-film transistors fabricated at low temperature’ by Hyukjoon Yoo et al., J. Mater. Chem. C, 2018, 6, 6187–6193.
Protein structure and computational drug discovery
Authors: Nero Tracy L. , Parker Michael W. , Morton Craig J.
Published: September 2018

The first protein structures revealed a complex web of weak interactions stabilising the three-dimensional shape of the molecule. Small molecule ligands were then found to exploit these same weak binding events to modulate protein function or act as substrates in enzymatic reactions. As the understanding of ligand–protein binding grew, it became possible to firstly predict how and where a particular small molecule might interact with a protein, and then to identify putative ligands for a specific protein site. Computer-aided drug discovery, based on the structure of target proteins, is now a well-established technique that has produced several marketed drugs. We present here an overview of the various methodologies being used for structure-based computer-aided drug discovery and comment on possible future developments in the field.
Cell cycle-dependent phosphorylation and regulation of cellular differentiation
Authors: Hardwick Laura J.A. , Azzarelli Roberta , Philpott Anna
Published: September 2018

Embryogenesis requires an exquisite regulation of cell proliferation, cell cycle withdrawal and differentiation into a massively diverse range of cells at the correct time and place. Stem cells also remain to varying extents in different adult tissues, acting in tissue homeostasis and repair. Therefore, regulated proliferation and subsequent differentiation of stem and progenitor cells remains pivotal throughout life. Recent advances have characterised the cell cycle dynamics, epigenetics, transcriptome and proteome accompanying the transition from proliferation to differentiation, revealing multiple bidirectional interactions between the cell cycle machinery and factors driving differentiation. Here, we focus on a direct mechanistic link involving phosphorylation of differentiation-associated transcription factors by cell cycle-associated Cyclin-dependent kinases. We discuss examples from the three embryonic germ layers to illustrate this regulatory mechanism that co-ordinates the balance between cell proliferation and differentiation.
Discriminative kernel sparse representation via l2 regularisation for face recognition
Authors: Wang Keqi , Hu Haifeng , Liu Tundong
Published: September 2018

A kernel‐based discriminative sparse representation method (KDSR) via l2‐norm regularisation for robust face recognition is proposed. Sparse representation in the original sample space is usually a linear representation which does not consider the non‐linear relationship of samples. To overcome this limitation, KDSR first maps the sample into high‐dimensional feature space via kernel tricks and then performs the discriminative sparse representation scheme in high‐dimensional feature space. KDSR can capture the non‐linear relationship of samples and contains more discriminative information of samples, which makes it have good classification performance. In addition, KDSR has a closed‐form solution, which makes it computationally efficient and easy to apply in practice. Experimental results on three benchmark databases demonstrate that KDSR can achieve better recognition performance than many state‐of‐the‐art methods.
Tutorial on the generation of ergodic trajectories with projection‐based gradient descent
Authors: Dressel Louis , Kochenderfer Mykel J.
Published: September 2018

A vehicle trajectory is ergodic with respect to some spatial distribution if the time spent in a region is proportional to the region's integrated density. One method of generating ergodic trajectories is projection‐based trajectory optimisation, a gradient descent method that supports non‐linear dynamics and balances trajectory ergodicity with control effort. In this study, the authors survey the existing literature on projection‐based trajectory generation, focusing on implementation. They introduce an easy‐to‐use, open‐source software package that generates ergodic trajectories orders of magnitude faster than previously reported. The authors’ goal is to simplify the implementation of projection‐based ergodic control so it can be applied widely across disciplines.
Dynamic texture classification using Gumbel mixtures in the complex wavelet domain
Authors: Qiao Yulong , Liu Qiufei , Liu Wenhui
Published: September 2018

Dynamic texture (DT) classification has attracted extensive attention in the field of image sequence analysis. The probability distribution model, which has been used to analysis DT, can describe well the distribution property of signals. Here, the authors introduce the finite mixtures of Gumbel distributions (MoGD) and the corresponding parameter estimation method based on expectation–maximisation algorithm. Then, the authors propose the DT features based on MoGD model for DT classification. Specifically, after decomposing DTs with the dual‐tree complex wavelet transform (DT‐CWT), the median values of complex wavelet coefficient magnitudes of non‐overlapping blocks in detail subbands are modelled with MoGDs. The model parameters are accumulated into a feature vector to describe DT. During the classification, a variational approximation version of the Kullback–Leibler divergence is used to measure the similarity between different DTs. The experimental evaluations on two popular benchmark DT data sets (UCLA and DynTex++) demonstrate the effectiveness of the proposed approach.
Robust support vector machine‐based zero‐crossing detector for different power system applications
Authors: Ghosh Minati , Koley Chiranjib , Roy Nirmal Kumar
Published: September 2018

The detection of zero‐crossing (ZC) points in several power system applications, such as power conversion, grid synchronisation, power conditioning, and power system automation and control, is important toward ensuring a consistent performance even when there is variation in the supply frequency. However, the state‐of‐the‐art techniques of ZC detection are not very accurate in the presence of noise and harmonic distortions. This study introduces the concept of a support vector machine (SVM) in this context and subsequently proposes a robust SVM‐based ZC detection technique that addresses the aforementioned limitations. The simulation results show that the proposed technique obtains accurate values in the presence of transients, noise levels of up to 20%, and harmonic distortions of up to 50%. The experimental results provide similar observations.
Optimal self‐healing strategy for microgrid islanding
Authors: Sun Wei , Ma Shanshan , Alvarez‐Fernandez Inalvis , Roofegari nejad Reza , Golshani Amir
Published: September 2018

Renewable resource based microgrids provide reliable and cost‐effective electricity with low carbon emissions. The flexibility of operating in grid‐connected or islanded modes enables a microgrid to serve loads reliably. In the case of unexpected events happening to the main grid, the microgrid will isolate itself and operate in islanded mode to prevent any adversary impacts. The availability of renewable generation in the microgrid has significant impacts on the islanding strategy and different scenarios need to be considered. This study proposes a comprehensive microgrid self‐healing strategy under different circumstances. The proposed strategy encompasses generation re‐dispatch, network reconfiguration, and load shedding. The microgrid self‐healing problem is formulated as a mixed‐integer quadratic programming problem, which provides a globally optimal solution to facilitate smooth islanding of the microgrid. A modified Consortium for Electric Reliability Technology Solutions microgrid is used to conduct simulation under various scenarios. The simulation results demonstrate the efficiency of the proposed self‐healing strategy in minimising costs of load shedding and generation with optimal switching actions.
Magnetically induced termination of giant planet formation
Authors: Cridland A. J.
Published: September 2018

Here a physical model for terminating giant planet formation is outlined and compared to other methods of late-stage giant planet formation. As has been pointed out before, gas accreting into a gap and onto the planet will encounter the planetary dynamo-generated magnetic field. The planetary magnetic field produces an effective cross section through which gas is accreted. Gas outside this cross section is recycled into the protoplanetary disk, hence only a fraction of mass that is accreted into the gap remains bound to the planet. This cross section inversely scales with the planetary mass, which naturally leads to stalled planetary growth late in the formation process. We show that this method naturally leads to Jupiter-mass planets and does not invoke any artificial truncation of gas accretion, as has been done in some previous population synthesis models. The mass accretion rate depends on the radius of the growing planet after the gap has opened, and we show that so-called hot-start planets tend to become more massive than cold-start planets. When this result is combined with population synthesis models, it might show observable signatures of cold-start versus hot-start planets in the exoplanet population.
Constraining the geometry of the nuclear wind in PDS 456 using a novel emission model
Authors: Luminari A. , Piconcelli E. , Tombesi F. , Zappacosta L. , Fiore F. , Piro L. , Vagnetti F.
Published: September 2018

Context. Outflows from active galactic nuclei (AGN) are often invoked to explain the co-evolution of AGN and their host galaxies, and the scaling relations between the central black hole mass and the bulge velocity dispersion. Nuclear winds are often seen in the X-ray spectra through Fe K shell transitions and some of them are called ultra fast outflows (UFOs) due to their high velocities, up to some fractions of the speed of light. If they were able to transfer some percentage of the AGN luminosity to the host galaxy, this might be enough to trigger an efficient feedback mechanism.

Aims. We aim to establish new constraints on the covering fraction and on the kinematic properties of the UFO in the powerful (Lbol ∼ 1047 erg s−1) quasar PDS 456, an established Rosetta stone for studying AGN feedback from disk winds. This will allow us to estimate the mass outflow rate and the energy transfer rate of the wind, which are key quantities to understand the potential impact on the host galaxy.

Methods. We analyze two sets of simultaneous XMM-Newton and NuSTAR observations taken in September 2013 and reported in Nardini et al. (2015, Science, 347, 860) as having similar broadband spectral properties. We fit the Fe K features with a P-Cygni profile between 5 and 14 keV, using a novel Monte Carlo model for the WINd Emission (WINE).

Results. We find an outflow velocity ranging from 0.17 to 0.28 c, with a mean value of 0.23 c. We obtain an opening angle of the wind of 71−8+13 deg and a covering fraction of 0.7−0.3+0.2, suggesting a wide-angle outflow. We check the reliability of the WINE model by performing extensive simulations of joint XMM-Newton and NuSTAR observations. Furthermore, we test the accuracy of the WINE model in recovering the geometrical properties of UFOs by simulating observations with the forthcoming Advanced Telescope for High-Energy Astrophysics (ATHENA) in the X-ray band.
Open cluster kinematics with Gaia DR2
Authors: Soubiran C. , Cantat-Gaudin T. , Romero-Gómez M. , Casamiquela L. , Jordi C. , Vallenari A. , Antoja T. , Balaguer-Núñez L. , Bossini D. , Bragaglia A. , Carrera R. , Castro-Ginard A. , Figueras F. , Heiter U. , Katz D. , Krone-Martins A. , Le Campion J.-F. , Moitinho A. , Sordo R.
Published: September 2018

Context. Open clusters are very good tracers of the evolution of the Galactic disc. Thanks to Gaia, their kinematics can be investigated with an unprecedented precision and accuracy.

Aims. The distribution of open clusters in the 6D phase space is revisited with Gaia DR2.

Methods. The weighted mean radial velocity of open clusters was determined, using the most probable members available from a previous astrometric investigation that also provided mean parallaxes and proper motions. Those parameters, all derived from Gaia DR2 only, were combined to provide the 6D phase-space information of 861 clusters. The velocity distribution of nearby clusters was investigated, as well as the spatial and velocity distributions of the whole sample as a function of age. A high-quality subsample was used to investigate some possible pairs and groups of clusters sharing the same Galactic position and velocity.

Results. For the high-quality sample of 406 clusters, the median uncertainty of the weighted mean radial velocity is 0.5 km s−1. The accuracy, assessed by comparison to ground-based high-resolution spectroscopy, is better than 1 km s−1. Open clusters nicely follow the velocity distribution of field stars in the close solar neighbourhood as previously revealed by Gaia DR2. As expected, the vertical distribution of young clusters is very flat, but the novelty is the high precision to which this can be seen. The dispersion of vertical velocities of young clusters is at the level of 5 km s−1. Clusters older than 1 Gyr span distances to the Galactic plane of up to 1 kpc with a vertical velocity dispersion of 14 km s−1, typical of the thin disc. Five pairs of clusters and one group with five members might be physically related. Other binary candidates that have been identified previously are found to be chance alignments.
Calculation of magnetic field intensity under power line with taking into account conductor sag
Authors: Król Krzysztof , Budnik Krzysztof , Jarek Piotr
Published: September 2018

The paper presents a calculation method of the magnetic field under an overhead power line taking into account conductor sag, which is described by the catenary curve. The calculations take into account the variability of the charge distribution along the conductor and wire sag for the eclectic field, while the calculation of intensity of the magnetic field take into account the impact of induced currents in the wires of lightning. The simulation results were compared with results measurements.
The economics of use of wireless power supply in electric buses
Authors: Filipiak Michał , Jajczyk Jarosław , Dobrzycki Arkadiusz
Published: September 2018

The article discusses the subject of wireless power supply for battery packs in electric buses. It presents the disadvantages and advantages of such a way to power the vehicle and charge the batteries. An attempt is made at analysing the economic legitimacy of use of this type of energy transfer method. The analysis is based on the annual course of the bus at the level of 70 000 km with the used battery pack whose capacity reaches 250 kWh. The assumed life of the system comprised of 2000 charging cycles. The characteristics of energy and losses was drawn up based on the entire life.
The outgoing time-harmonic electromagnetic wave in a half-space with non-absorbing impedance boundary condition
Authors: Rojas Sergio , Muga Ignacio , Jerez-Hanckes Carlos
Published: September 2018

We show existence and uniqueness of the outgoing solution for the Maxwell problem with an impedance boundary condition of Leontovitch type in a half-space. Due to the presence of surface waves guided by an infinite surface, the established radiation condition differs from the classical one when approaching the boundary of the half-space. This specific radiation pattern is derived from an accurate asymptotic analysis of the Green’s dyad associated to this problem.
Thermal decomposition behavior of water hyacinth (eichhornia crassipes) under an inert atmosphere
Authors: Sukarni Sukarni , Widiono Aloon Eko , Sumarli Sumarli , Wulandari Retno , Nauri Imam Muda , Permanasari Avita Ayu
Published: September 2018

Thermogravimetric analysis experiment to understand thermal decomposition behavior of water hyacinth during the pyrolysis has been performed. Water hyacinth was taken randomly from 2 places, i.e., Selorejo and Sengguruh Dam, district of Malang, Indonesia. Those raw materials were thoroughly cleaned by using the water, then cut and dried in an oven with a temperature range of 80-90 °C for 6 hours. Subsequently, the dried samples were crushed and then filtered to a mesh size of 60. Thermal behavior of the sample was observed through the instrumentality of thermal analyzer at a constant heating rate of 10 °C/min with a nitrogen flow rate of 100 ml/min and a temperature range of 25-1000 °C. The kinetics of active pyrolysis zone were evaluated by Coats-Redfern integral method. The thermogravimetric test results show that the water hyacinth biomass decomposed into four stages during the pyrolysis process. The kinetic parameters in term of activation energy (E), logarithmic frequency factor (log A) and reaction order (n) were 60.74 kJ/mol, 4.77/min and 1.9, respectively.
Service design improvement in Ragunan Zoo using TRIZ methodology
Authors: Hakim Inaki Maulida , Narpawandawi Kusuma , Zagloel Teuku Yuri M.
Published: September 2018

Indonesia is a country that has a great potential in tourism with its beautiful landscape and also the culture diversity. It makes government of Indonesia actively do development programs in the tourism sector to make tourism as one of the biggest contributor to Indonesia GDP. Ragunan Zoo has been selected to be the pilot project in cashless transaction at recreation places all over Indonesia. It has been applied since May 2016 but there still a lot of dissatisfaction from the visitor. So then, this research is trying to improve the service design in cashless transaction for ticket purchasing in Ragunan Zoo accordance with Ragunan visitor preferences to help successing government program. Researcher use Themequal to develop a questionnaire that has been distributed to 390 respondents. Result from questionnaire then processed using Fuzzy Gap Analysis and TRIZ method to get the possible solutions. Service Blueprint then used to illustrate the improvement of service design on ticket purchase at Ragunan Zoo based on the results.
Optimization of industrial machine maintenance scheduling using ant colony method
Authors: Soenandi Iwan Aang , Budiman Teuku Emily
Published: September 2018

The importance of machine maintenance has been gradually recognized especially with the great attention in industrial sector. A company was named M is a manufacturing company which engaged in the industrial manufacturer of body pail cans. Previously, the process of machine maintenance at company M is to repair the machine when a problem occurs. This causes several machines to break down frequently and disrupt the production process. Furthermore, the purpose of this research is to determine the optimum and well-planned maintenance scheduling that can reduce the risk of-or prevent machine failures that may ruin the production process by doing the preventive maintenance in right time. Ant Colony Optimization (ACO) method was used in this research as maximizing the interval time between preventive maintenance periods before the trouble occurs based on previous breakdown data period as minimizing frequency of the task. In the principle of ACO, the required parameters are α, β, m, e, el. As a result of using ACO with the combination of parameters above, the optimal well-planned maintenance scheduling was obtained by using α=2, β=5, e=0.3, e1=0.96, and a number of ants needed. Finally, the optimizing of schedule maintenance has proposed in daily for next year period.
Supplier selection and consistency level measurement of decision maker using AHP method and expertise level model
Authors: Rozi Fatkhor , Herowati Evy
Published: September 2018

Raw materials are basic need for manufacturing companies to facilitate the production process. Therefore, supplier selection process is an important process for the company, because by choosing the right suppliers of raw materials will benefit the company. To choose the right supplier is also determined by the decision taken by the decision maker (DM). In addition, the weight of DM assessment will differ on different criteria because DM experts in a particular field are not necessarily experts in other fields. Therefore, in this paper is discussed about the measurement of the weight of each criterion and alternative to choose the best supplier alternative using AHP method. In addition, this paper also measures the consistency of DM in making decisions using expertise level models.
The use of indonesian soybean variety with time and planting location to the production to meet the demand
Authors: Budiharti Nelly , Wardana Ing
Published: September 2018

Based on data from the Central Bureau of Statistics, Jakarta [1], Ministry of Agriculture and Preliminary Study of National Medium-Term Development Plan (RPJMN) on food and agriculture, stage III, 2015-2019 [2] the demand for soybeans in Indonesia will remain increasing by the population growth. The author's research [3] previously concluded that efforts to increase the number of Indonesian soybean production include utilizing abandoned land and planting throughout the year. This study acts as a verification of previous research by using planting of Indonesian varieties of soybean in various time and planting location in order to meet the demand for soybean commodity. This research was conducted by experiment using 3 superior varieties with 3 planting time, which is planted in 3 sub districts of Malang regency, East Java province, Indonesia. Data Processing and analysis use experimental design that is latin square design with 95% confidence level. The results obtained that the use of different varieties with different planting time and location has no effect on the production. The different production result is on account of the fact that each variety has its own profile.
Development progress monitoring system in Engineering Procurement Construction (EPC) company with Earn Value Analysis (EVA) approach based on web mobile
Authors: Budiman Rhadityo Shakti , Gunarta I Ketut
Published: September 2018

At the time, development of technology and system information provide an idea in project management information system. One of industrial which growing up in Indonesia is Engineering Procurement and Construction (EPC), in this case required a system to facilitate between all stakeholders to improve their performance. Progress report on the project that was created approach using earn value analysis (EVA) system which considered cost and schedule of work as well as a productivity performance index of workers. In addition, project progress was formed by comparing between plans and realization of work which has projected since of the beginning of the project. The result on the system was provides information of progress every time through on the dashboard page input by the user. The first step of making a report on the system, started which input the project name and then step over to make the detailed work in each department or discipline in project. The data obtained were then processed by the project control team to provide information of progress project status against the top management. The establishment of information system can be stored and accessed online by all user who have been classified in the system. That information can be integrated between the top management to take a decision against the ongoing project.
Development lean assessment indicator: A case study
Authors: Rakhmanhuda Iffad , Karningsih Putu Dana
Published: September 2018

The manufacturing industry is always faced with global challenges such as cost effectiveness, lead time, quality, and safety. Lean as a concept of continuous improvement can be a solution in solving the challenge. PT. Compotec International is one of the companies faced with the problem. Basically, the company has implemented lean concept in its production process, but the lack of understanding and commitment of the company in its implementation still leads to the emergence of waste in the production process. Therefore a comprehensive measurement is needed to assess company performance from several dimensions such as time effectiveness, quality, process, cost, human resources, delivery, customer, and inventory. In the previous lean assessment tools research, safety issues that became the basis of production considerations before making improvements have not been taken yet into account. Therefore it is necessary to integrate waste based indicators related to poor safety. Measurements are done qualitatively and quantitatively using aggregate scoring and fuzzy approaches. From the measurement result and then weighted with Brown-Gibson method to get the value of leanness. then the results of these calculations are combined to be visualized in the form of lean radar chart. In this research, it is hoped that the development of new lean assessment can measure lean performance more comprehensively.
Artificial salmon tracking algorithm: Preliminary designing approach for optimizing the integrated mixed energy composition
Authors: Afandi A.N. , Fadlika Irham , Sias Quota Alief , Rahmawati Y. , Lestari D. , Handayani A.N. , Sulistyorini Yunis , Farrel C.W.A. , Michiko R.S.A.
Published: September 2018

Recently, an energy mix providing becomes an important problem to face unsustainable energy sources fuelled by coal derivation. The optimal composition between various energy sources also leads to the generated portion of the unit commitment. By considering this issues, these works are subjected to find out the optimal scheduled production of the energy mix throughout an optimization problem considered conventional and renewable energy sources. Moreover, these studies also introduce Artificial Salmon Tracking Algorithm for carrying out the problem. By considering technical requirements, results show that the total energy mixing is produced dynamically to feed the hourly demand. The contribution of the conventional and renewable energy sources affect to discharged pollutants.
Influence of boundary slip layout on the hydrodynamic performance of partially textured journal bearing by CFD method
Authors: Tauviqirrahman Mohammad , Muchammad  , Akbar Rizky Amanullah , Jamari
Published: September 2018

Modification of the lubricated surface by combining the boundary slip and the texturing has proven to enhance the hydrodynamic performance of bearing. The present work explores the combined effect of boundary slip and texturing varying slip layout on the performance of journal bearing using computational fluid dynamic (CFD) approach. The effect of eccentricity ratio is also of particular interest. The results show that when the boundary slip is located on all edges of textured surface, more enhanced load support by 4% is obtained in comparison with classical (no-slip) textured one. However, in general the results also indicate that introducing the boundary slip with different layouts on partially textured surface does not much affect the hydrodynamic pressure as well as the load support; therefore, the slip-textured bearing shows similar and closer trend to the no-slip textured one. In addition, it is also found that the effect of eccentricity ratio is more influential than the boundary slip in terms of load support.
The implementation of Customer Relationship Management (CRM) on textile supply chain using k-means clustering in data mining
Authors: Dwiastuti Anik , Larasati Aisyah , Prahastuti Endang
Published: September 2018

Supply chain in textile industry requires an involvement of several other related industry therefore it divide into several sub-sector industry. The market dynamic and complexity of supply chain network are causing problem. This study aims to classify the market base on consumers behaviour through their preferences in textile product in East Java. Analysis of data using data mining approach. Algorithm K-means type clustering is use as clustering methods by integrating with Customer Relationship Management (CRM) concept. The simulation result of data set using five cluster depends on their variability value are Lumajang, Malang, Madura, Tulungagung, and Ponorogo. The clusters formed have the highest importance predictor in “way of purchase” and the lowest in “purchase flexibility”. The result in this study is generally indicate that consumers of textile products in East Java prioritize values in customer value compared to product quality.
Quenching and tempering parameter on Indonesian hot rolled plate steel for armour steel
Authors: Yurianto  , Pratikto  , Sonoko Rudy , Wahyono  , Bayuseno A.P.
Published: September 2018

Armour steel is a high strength and hardness steel used to protect damage by an object, individual or vehicle from the direct pressure of projectile. This steel used for military and commercials equipment in Indonesia and produced out of hot rolled plate steel made by PT. Krakatau Steel (Persero) Cilegon, Banten, Indonesia. By using quench (with water sprayed) and temper heat treatment produced Quenched & Tempered Steels. The aim of the study to obtain optimum quenching and tempering parameter in hardness and impact energy of HRP Steel. Method of this study by optimizing austenite temperature; austenite holding time; temper temperatures; hardness and impact energy. The result of this study is austenite temperatures 900°C (held 45 minutes) and temper temperatures 125°C (held 45 minutes). Prediction of both hardness and impact energy is 569.96 HVN (536.00 BHN) and 30.50 J respectively.