bluuebunny/crossref_metadata_2025_split huggingface dataset:
Spatial pattern and determinants of migrant workers' interprovincial hukou transfer intention in China: Evidence from a National Migrant Population Dynamic Monitoring Survey in 2016
Authors: Gu Hengyu , Liu Ziliang , Shen Tiyan 
Published: July 2019

AbstractUsing 2016 data from the National Migrant Population Dynamic Monitoring, this article establishes a relationship network to describe migrant workers' interprovincial hukou transfer intention in China. Spatial analysis methods and the eigenvector spatial filtering gravity model are employed to examine the spatial pattern and determinants of the hukou transfer intention network. The results show that (a) most interprovincial migrant workers in China are less educated, middle aged, with middle‐ or low‐income levels, and job oriented, and their average interprovincial hukou transfer intention is 0.361; (b) there is significant network autocorrelation in the intention network, which presents a clustered and unbalanced spatial pattern where higher ranking intention flows from relatively less developed regions to more developed megacities; (c) provinces' hukou attractiveness to migrant workers demonstrates a random spatial pattern, but the hukou exclusion patterns are spatially concentrated: The north‐east provinces are hotspots, whereas several central and north‐east provinces are cold spots; (d) among geographical factors, distance exerts a negative influence on migrant workers' hukou transfer intention, whereas population size does not matter at origin or destination. Socio‐economic factors, especially disposable income, play the most significant role in impacting migrant workers' hukou transfer intention; and (e) as for individual factors, migrant workers' interprovincial migration is an economic decision based on family development: Those with more children, higher ratios of income to cost, or higher education levels are reluctant to transfer their hukous. Besides, the job and housing conditions of migrant workers are also closely related to their hukou transfer intentions.
Characterization of aporphine alkaloids by electrospray ionization tandem mass spectrometry and density functional theory calculations
Authors: Carnevale Neto Fausto , Andréo Márcio Adriano , Raftery Daniel , Lopes João Luis Callegari , Lopes Norberto Peporine , Castro‐Gamboa Ian , Lameiro de Noronha Sales Maia Beatriz Helena , Costa Emmanoel Vilaça , Vessecchi Ricardo 
Published: July 2019

RationaleAporphine alkaloids represent a large group of isoquinoline natural products with important roles in biological and biomedical areas. Their characterization by electrospray ionization tandem mass spectrometry (ESI‐MS/MS) can contribute to their rapid identification in complex biological matrices.MethodsWe report the fragmentation of protonated 7,7‐dimethylaporphine alkaloids by ESI‐MS/MS, and the putative annotation of aporphine alkaloids in plant extracts. We used low‐ and high‐resolution MS/MS analyses to rationalize the fragmentation pathways, and employed the B3LYP/6‐31 + G(d,p) density functional theory (DFT) model to provide thermochemical parameters and to obtain the reactive sites.ResultsDFT calculations of a set of 7,7‐dimethylaporphine alkaloids suggested the heterocyclic amino group as the most basic site due to the proton affinity of the nitrogen atom. Collision‐induced dissociation experiments promoted •OCH3 elimination instead of the expected neutral loss of the heterocyclic amino group, pointing to the [M − 15 + H]•+ ion as the diagnostic fragment for 7,7‐dimethylaporphine alkaloids. The analysis of plant extracts led to the annotation of 25 aporphine alkaloids. Their fragmentation initiated with the loss of the amino group followed by formation of a cyclic carbocation. Further reactions derived from consecutive charge‐remote and/or charge‐induced fragmentations of the substituents attached to the aromatic system. The mechanisms were re‐examined based on plausible gas‐phase ion chemistry reactions.ConclusionsTaken together, the diagnostic product ions and the series of radical and neutral eliminations provided information about the location of methylenedioxy, aromatic methoxy, and vicinal methoxy and hydroxy groups in aporphine alkaloids, assisting their characterization via MS/MS.
Remote mobile manipulation with the centauro robot: Full‐body telepresence and autonomous operator assistance
Authors: Klamt Tobias , Schwarz Max , Lenz Christian , Baccelliere Lorenzo , Buongiorno Domenico , Cichon Torben , DiGuardo Antonio , Droeschel David , Gabardi Massimiliano , Kamedula Malgorzata , Kashiri Navvab , Laurenzi Arturo , Leonardis Daniele , Muratore Luca , Pavlichenko Dmytro , Periyasamy Arul S. , Rodriguez Diego , Solazzi Massimiliano , Frisoli Antonio , Gustmann Michael , Roßmann Jürgen , Süss Uwe , Tsagarakis Nikos G. , Behnke Sven 
Published: July 2019

AbstractSolving mobile manipulation tasks in inaccessible and dangerous environments is an important application of robots to support humans. Example domains are construction and maintenance of manned and unmanned stations on the moon and other planets. Suitable platforms require flexible and robust hardware, a locomotion approach that allows for navigating a wide variety of terrains, dexterous manipulation capabilities, and respective user interfaces. We present the CENTAURO system which has been designed for these requirements and consists of the Centauro robot and a set of advanced operator interfaces with complementary strength enabling the system to solve a wide range of realistic mobile manipulation tasks. The robot possesses a centaur‐like body plan and is driven by torque‐controlled compliant actuators. Four articulated legs ending in steerable wheels allow for omnidirectional driving as well as for making steps. An anthropomorphic upper body with two arms ending in five‐finger hands enables human‐like manipulation. The robot perceives its environment through a suite of multimodal sensors. The resulting platform complexity goes beyond the complexity of most known systems which puts the focus on a suitable operator interface. An operator can control the robot through a telepresence suit, which allows for flexibly solving a large variety of mobile manipulation tasks. Locomotion and manipulation functionalities on different levels of autonomy support the operation. The proposed user interfaces enable solving a wide variety of tasks without previous task‐specific training. The integrated system is evaluated in numerous teleoperated experiments that are described along with lessons learned.
Professionalizing entrepreneurial firms: Managing the challenges and outcomes of founder‐CEO succession
Authors: Kaehr Serra Caroline , Thiel Jana 
Published: July 2019

Abstract
Research summaryThe transition from a founder‐led start‐up to a professionally managed firm entails significant change in the firm's organizational design. This transition can constitute a critical juncture for the entrepreneurial firm, and there is a risk of losing key talent. We posit that limiting the disruptive effect of changing organizational structures requires organizational members to not only adopt new roles but also embrace new behavioral norms regarding how the firm operates. We use an inductive multicase study paired with exogenous data on company morale to explore outcome variation in such transitional processes and elicit managerial strategies that can guide successful founder‐CEO succession and the accompanying organizational change of the entrepreneurial firm.
Managerial summaryAdapting the organizational structures of an entrepreneurial firm to match the needs of its expanding operations represents a critical moment in a firm's life. During this phase, the founder‐CEO is often replaced by a professional CEO. This event coupled with reorganization can be highly unsettling for the venture's workforce and can lead to turnover with negative performance implications. To minimize disruption, we studied change strategies employed by incoming professional CEOs. We find that most effective CEOs jointly use three change levers—change readiness activation, shared pathway creation, and founder legacy fairness—to help team members adapt to the new situation and align their behaviors with how mature firms operate.
A Novel Synthesis Method of La–Mg‐Ni‐based Superlattice by LaNi5 Absorbing Gas‐state Mg
Authors: Zhao Xin , Ke Dandan , Cai Ying , Hu Feng , Liu Jingjing , Zhang Lu , Han Shumin 
Published: July 2019

AbstractLa−Mg‐Ni based alloys are considered as future negative material for Ni‐MH batteries, while the volatilization of Mg hinders their application. Mg volatilization is considered irreversible in the preparation process. Herein, we provide a novel process to produce superlattice La−Mg‐Ni‐based alloy via alloying gas‐state Mg with LaNi5 slice. The formation of superlattice structures is verified in detail by microstructure characterization and element distribution analysis. The results indicate that there exists an equilibrium state for Mg solution in the La−Mg‐Ni alloy, and the gas‐state Mg atoms are directly absorbed by the LaNi5 alloy. With increasing the absorption time, Mg in LaNi5 slice bends to become more homogenous. It is attributed that the integration of the gas‐state Mg atoms leads to the transformation of the crystal structure of the LaNi5 cells on the slice surface into MgCu4Sn‐type phase, thus the solid LaNi5 phase turn to liquid MgCu4Sn‐type phase under the high temperature. Further, the liquid phase permeates into the inside of the LaNi5 slice along crystal boundaries which alloys with LaNi5 lattices to form Ce2Ni7‐type phase. This technology proves that the migration of metal atoms in gas state can induce a regroup phenomenon to form solid state crystal and provides a brand method for hydrogen storage materials preparation.
Preparation and Characterization of Piper Betle Linn. Leaf Extract Incorporated Chitosan Films as Potential Active Food Packaging Materials
Authors: Thuong Nguyen Thi , Ngoc Bich Hoang Thi , Thuc C. N. Ha , Quynh Bui Thi Phuong , Minh Le Van 
Published: July 2019

AbstractThe present paper reports on the preparation and characterization of potential edible packaging films based on the combination of chitosan and Piper betle Linn. leaf extract (PBLLE). The incorporation of PBLLE was found to improve important characteristics of the chitosan film, making it ideally suitable for active packaging applications. In particular, the blend films exhibited very strong inhibitory activities against both gram‐negative and gram‐positive bacteria such as Bacillus subtilis and Salmonella Typhimurium. Moreover, IC50 values of the blend films were recorded at low levels (10.63‐ 22.81 μg/mL) in the PBLLE range of 1–3% v/v. Both antimicrobial and antioxidant activities of the blend films increased with increasing incorporated PBLLE content (from 1 to 3% v/v) taking into account the activities of polyphenolic compounds contained in the extract. Compared to the pure chitosan film, a significantly lower swelling degree, higher resistance to water vapor permeation and desired flexibility were recorded for the films with sufficient extract content. Interestingly, no considerable difference in the thermal stability of the pure chitosan and the blend films was detected in thermal analysis. In addition, effects of PBLLE on other mechanical and optical properties of the blend films were also examined in detail.
Two New Quinoline‐Benzothiazole Blended ‘Off‐On’ Type Fluorescent Probes Exclusively Detect Cd2+
Authors: Aich Krishnendu , Das Sangita , Gharami Saswati , Patra Lakshman , Mondal Tapan Kumar 
Published: July 2019

AbstractIn this paper, two new quinoline‐benzothiazole based probes (QBTP1 and QBTP2) have been synthsized for the selective detection of Cd2+. Both the probes showed selective ‘Turn‐On’ emission change towards Cd2+. Structure of QBTP1 was confirmed through its single crystal X‐ray study. QBTP1 itself showed a weak emission band at 488 nm which upon addition of Cd2+ enhanced dramatically with a slight redshift to 507 nm. Consequently, weak cyan emission of QBTP1 changes to green which is easily observable through naked eyes. QBTP2 also showed almost similar fluorescence change upon addition of Cd2+ to that of QBTP1. The intramolecular charge tranfer (ICT) and chelation enhanced fluorescence (CHEF) mechanisms may play here the key role for this type of redshift of emission maximum and enhancement of fluorescence intensity respectively, upon addition of Cd2+ to the probes. Both the probes exclusively detecs Cd2+ over any other cations tested. Most importantly, not a minute interference was observed by Zn2+ or Hg2+. Capabilities of the probes to be used as portable kits for on‐site detection of Cd2+ without using any expensive instrumental help was also shown here. Furthermore, the limit of detection of both the probes were found in the order of 10−9 to 10−10 M range which indicates the high sensitivity of the probes towards Cd2+.
MOF Derived High Surface Area Enabled Porous Co3O4 Nanoparticles for Supercapacitors
Authors: Saraf Mohit , Rajak Richa , Mobin Shaikh M. 
Published: July 2019

AbstractIn this work, solvothermally grown ZIF‐67 MOF crystals were utilized as single source molecular precursor, which were transformed into porous Co3O4 nanoparticles through a simple calcination treatment. The crystal structure of ZIF‐67 was also authenticated by single crystal x‐ray analysis. Further, Co3O4 nanoparticles were incorporated as supercapacitor electrode. The results show that ZIF‐67 derived Co3O4 nanoparticles deliver an appreciable specific capacitance (190 F g−1 at 5 A g−1) with high capacitance retention (71.42% after 5000 cycles). The comparison with previous state‐of‐the‐arts highlights the importance of MOF derived nanomaterials for achieving superior electrochemical performance.
Syntheses, Crystal Structures and Experimental/Theoretical Magnetic Properties of Two Butterfly NiII2YIII2 Compounds
Authors: Mandal Shuvankar , Majumder Samit , Mohanta Sasankasekhar 
Published: July 2019

AbstractSyntheses, crystal structures and density functional theoretical magnetic properties of [NiII2YIII2L4(NO3)2(MeOH)2] (1) and [NiII2YIII2L4(NO3)2(H2O)2]⋅2H2O (2) and experimental magnetic properties of 2 are described, where H2L is the Schiff base ligand, obtained on [1+1] condensation of 3‐ethoxysalicylaldehyde and 2‐aminophenol. When compound 1 was exposed to open atmosphere, compound 2 was formed via single crystal to single crystal transformation. Variable‐temperature (5–300 K) magnetic susceptibility and variable‐field (up to 5 T) magnetization data for 2 reveal ferromagnetic exchange interaction between two NiII metal ions with J=1.61(0.01) cm–1. Broken symmetry density functional calculations for both 1 and 2 also reveal the ferromagnetic interaction with J values of 3.6 and 4.3 cm‐1, respectively. DFT calculations have also been performed for the only known and magnetically characterized NiII2YIII2 compound [Et3NH]2[NiII2YIII2(μ3‐OH)2(O2CtBu)10](Inorg. Chem. 2015, 54, 5930), reveling nice matching of ferromagnetic interaction in 2 (J(Exp)=1.61(0.01) cm–1 and J(DFT)=4.3 cm–1) and antiferromagnetic interaction in the former (J(Exp)=‐4.6 cm–1 and J(DFT)=‐5.4 cm–1). Comparing the simulations of the magnetic data of [NiII2YIII2L4(NO3)2(H2O)2]⋅2H2O (2) and [NiII2GdIII2L4(NO3)2(H2O)2]⋅2H2O (Eur. J. Inorg. Chem. 2018, 2793), the role of diamagnetic metal ion in the values of magnetic parameters in an all‐paramagnetic cluster has been demonstrated in details.
Steel‐lined pressure shafts – appropriate design for external pressure
Authors: Unterweger Harald , Ecker Alexander 
Published: July 2019

AbstractDuring inspection work, when the pipe is empty, a thin‐walled steel pipe is susceptible to shell buckling due to external pressure. Comprehensive research activities, including tests, began in the 1960s, and analytical and empirical formulae were developed for design.Some of these different analytical design concepts are presented in the first part of the paper, and their results are compared for the whole range of pipe slenderness in practice.Afterwards, the results of extensive numerical calculations are shown. These deal with different imperfections in practice and are not considered in the current design solutions. In addition, the effect of the radial flexibility of the surrounding rock mass has been studied – an issue ignored up to now. All these results are compared with the design formulae in practice.It is therefore possible to conclude the paper with an appraisal of the individual solutions in practice and sum up appropriate design rules for external pressure.
Lithographic micropatterning on the β‐PVDF film using reactive ion etching aim for high‐resolution skin sensors
Authors: Miki Hirofumi , Sugii Ryota , Kawabata Yutoku , Tsuchitani Shigeki 
Published: July 2019

We report a method for high‐fidelity lithographic patterning of the flexible β‐phase polyvinylidene difluoride (PVDF) film using traditional cleanroom equipment and commercially available materials. In our process, the chemically reactive gas of CHF3, CF4 and SF6 was used as a simple substance mixed with O2. The effects of process parameters on the PVDF dry etching characteristics were investigated by controlling that of Radio frequency (RF) power, process pressure, gas type and the mixed concentration in O2 as well as its mass flow rate. At a constant RF power (100 W) and associated process conditions, 40–70 µm of fine‐line patterns and several tens µm/h of high etch rate could be realized on a 110 µm‐thick β‐PVDF film without much loss of its piezoelectricity. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Validation of the first LiDAR wind resource assessment buoy system offshore the Northeast United States
Authors: Viselli Anthony , Filippelli Matthew , Pettigrew Neal , Dagher Habib , Faessler Nathan 
Published: July 2019

AbstractThe US offshore wind industry is maturing with several projects in various stages of development. These projects require site wind and environmental data before and during operation. Conventional techniques such as fixed‐bottom meteorological towers present economical and permitting challenges for the US. Floating Light Detection and Ranging (LiDAR) buoys offer significant advantages including reduced costs, less permitting, and reusability. This paper presents the validation of the first floating LiDAR buoy in Northeast US waters. The buoy, named DeepCLiDAR, includes a LiDAR, ecological monitoring sensors, and metocean sensors. A three‐phase LiDAR validation plan was executed, and its results are presented. The objective of the validation plan was to verify the accuracy of measurements made by the LiDAR buoy in wave environments against an unmoving reference wind measurement. Due to a lack of reference met masts, the use of a LiDAR on land as a baseline reference was implemented for validation. Comparison to a reference LiDAR instead of a traditional meteorological tower was a unique approach required in the Northeast US waters due to the absence of a reference fixed‐bottom meteorological tower in the region at the time of this study. The testing included a comparison of wind speed measurements made by the buoy deployed 15 km offshore from the mainland and a land‐based reference LiDAR located on a nearby island. This paper presents the methodology and results of this program, which indicate favorable agreement. This was the first such validation program in the Northeast USA which is now seeing rapid development of offshore wind.
Role of Personality Characteristics and Sexual Orientation in the Risk for Sexual Addiction Among Israeli Men: Validation of a Hebrew Sex Addiction Scale
Authors: Paz Guy , Griffiths Mark D. , Demetrovics Zsolt , Szabo Attila 
Published: July 2019

AbstractMen having sex with men are known to exhibit heightened sexual activity. This raises the conjecture that different sexual orientations exhibit different levels of sex addiction risk, which is also affected by personality. The present study examined the prevalence of the sex addiction risk within the context of sexual orientation and personality in Israeli men while also validating the Hebrew Bergen-Yale Sex Addiction Scale (HBYSAS). Results based on 177 participants showed that the HBYSAS is appropriate for assessing the risk for sex addiction in Israeli men. Furthermore, results showed that sex addiction risk varied with individuals’ sexual orientation while being modestly associated with higher neuroticism and lower conscientiousness.
RNA editing blood biomarkers for predicting mood alterations in HCV patients
Authors: Salvetat N. , Van der Laan S. , Vire B. , Chimienti F. , Cleophax S. , Bronowicki J. P. , Doffoel M. , Bourlière M. , Schwan R. , Lang J. P. , Pujol J. F. , Weissmann D. 
Published: July 2019

AbstractTreatment-emergent depression is a common complication in patients with chronic hepatitis C virus (HCV) infection undergoing antiviral combination therapy with IFN-α and ribavirin. It has recently been shown that changes in A-to-I RNA editing rates are associated with various pathologies such as inflammatory disorders, depression and suicide. Interestingly, IFN-α induces gene expression of the RNA editing enzyme ADAR1-1 (ADAR1a-p150) and alters overall RNA editing activity. In this study, we took advantage of the high prevalence of pharmacologically induced depression in patients treated with IFN-α and ribavirin to test the interest of RNA editing–related biomarkers in white blood cells of patients. In this 16-week longitudinal study, a small cohort of patients was clinically evaluated using standard assessment methods prior to and during antiviral therapy and blood samples were collected to analyse RNA editing modifications. A-I RNA editing activity on the phosphodiesterase 8A (PDE8A) gene, a previously identified RNA editing hotspot in the context of lupus erythematosus, was quantified by using an ultra-deep next-generation sequencing approach. We also monitored gene expression levels of the ADAR enzymes and the PDE8A gene during treatment by qPCR. As expected, psychiatric evaluation could track treatment-emergent depression, which occurred in 30% of HCV patients. We show that PDE8A RNA editing is increased in all patients following interferon treatment, but differently in 30% of patients. This effect was mimicked in a cellular model using SHSY-5Y neuroblastoma cells. By combining the data of A-I RNA editing and gene expression, we generated an algorithm that allowed discrimination between the group of patients who developed a treatment-emergent depression and those who did not. The current model of drug-induced depression identified A-I RNA editing biomarkers as useful tools for the identification of individuals at risk of developing depression in an objective, quantifiable biological blood test.