bluuebunny/crossref_metadata_2025_split huggingface dataset:
UAV-borne X-band radar for collision avoidance
Authors: Moses Allistair , Rutherford Matthew J. , Kontitsis Michail , Valavanis Kimon P. 
Published: July 2013

SUMMARYThe increased use of unmanned aerial vehicles (UAVs) is coincidentally accompanied by a notable lack of sensors suitable for enabling further improvement in levels of autonomy and, consequently, integration into the National Airspace System (NAS). The majority of available sensors suitable for UAV integration into the NAS are based on infrared detectors, focal plane arrays, optical and ultrasonic rangefinders, etc. These sensors are generally not able to detect or identify other UAV-sized targets and, when detection is possible, considerable computational power is typically required for successful identification. Furthermore, the performance of visual-range optical sensor systems may suffer when operating under conditions that are typically encountered during search and rescue, surveillance, combat, and most other common UAV applications. However, the addition of a miniature RADAR sensor can, in consort with other sensors, provide comprehensive target detection and identification capabilities for UAVs. This trend is observed in manned aviation where RADAR sensors are the primary on-board detection and identification sensors. In this paper, a miniature, lightweight X-band RADAR sensor for use on a miniature (710-mm rotor diameter) rotorcraft is described. We present an analysis of the performance of the RADAR sensor in a realistic scenario with two UAVs. Additionally, an analysis of UAV navigation and collision avoidance behaviors is performed to determine the effect of integrating RADAR sensors into UAVs. Further study is also performed to demonstrate the scalability of the RADAR for use with larger UAV classes.
An update on frailty diagnosis and management
Authors: Deane Andrew JB , Jaafar Ahmed F 
Published: July 2013

SummaryFrailty as a clinical syndrome is becoming more widely recognized and current evidence shows the importance of early detection of pre-frail states with a potential for reversibility of poor outcomes. The purpose of this review is to present the latest literature on frailty since the last review in this journal in 2007, with a particular focus on interventions aimed at reversing the processes of frailty.
Consumption of foods with voluntary fortification of micronutrients in southern Brazil: prevalence and associated factors
Authors: Cirino Ana Carolina Lima , de Vargas Zanini Roberta , Gigante Denise Petrucci 
Published: July 2013

AbstractObjectiveTo investigate the consumption of foods with voluntary fortification of vitamins and minerals (FVFVM) according to demographic, socio-economic and health characteristics.DesignA cross-sectional population-based study.SettingThe investigated food groups were selected in two stages according to availability of food in the local market and prevalence of food consumption in a recent national survey. The research instruments included a questionnaire and a photographic catalogue. The FVFVM consumption covered a period of one week prior to the interview date. Statistical analyses were performed using Stata 12·0 statistical software package, considering the design effect and a hierarchical model. A multinomial logistic regression was applied to estimate the prevalence ratios. All tests were two-tailed, with a 5·0 % significance level.SubjectsAdults (≥20 years old) living in a southern city of Brazil.ResultsBetween February and June 2012, 2925 individuals were interviewed. Losses and refusals corresponded to 13·4 % of the sample. The overall prevalence of FVFVM consumption was 73·3 (95 % CI 71·7, 75·9) %. The total number of FVFVM reported exhibited a distribution with a median of two and a maximum of fifteen, inflated by the FVFVM categorized in the ‘juice’ group. The micronutrients most consumed were vitamin C, followed by Fe and thiamin. Young adults, females, those of higher socio-economic status and those who perceived their health positively were more likely to consume FVFVM.ConclusionsPrevalence of FVFVM consumption in southern Brazil, occurring concurrently with the decline in consumption of unprocessed and minimally processed foods, and the way voluntary fortification is being employed trigger a warning sign to primary prevention.
Distinct iron isotopic signatures and supply from marine sediment dissolution
Authors: Homoky William B. , John Seth G. , Conway Tim M. , Mills Rachel A. 
Published: July 2013

AbstractOceanic iron inputs must be traced and quantified to learn how they affect primary productivity and climate. Chemical reduction of iron in continental margin sediments provides a substantial dissolved flux to the oceans, which is isotopically lighter than the crust, and so may be distinguished in seawater from other sources, such as wind-blown dust. However, heavy iron isotopes measured in seawater have recently led to the proposition of another source of dissolved iron from ‘non-reductive’ dissolution of continental margins. Here we present the first pore water iron isotope data from a passive-tectonic and semi-arid ocean margin (South Africa), which reveals a smaller and isotopically heavier flux of dissolved iron to seawater than active-tectonic and dysoxic continental margins. These data provide in situ evidence of non-reductive iron dissolution from a continental margin, and further show that geological and hydro-climatic factors may affect the amount and isotopic composition of iron entering the ocean.
Nanocontainers made of Various Materials with Tunable Shape and Size
Authors: Zhao Xianglong , Meng Guowen , Han Fangming , Li Xiangdong , Chen Bensong , Xu Qiaoling , Zhu Xiaoguang , Chu Zhaoqin , Kong Mingguang , Huang Qing 
Published: July 2013

AbstractNanocontainers have great potentials in targeted drug delivery and nanospace-confined reactions. However, the previous synthetic approaches exhibited limited control over the morphology, size and materials of the nanocontainers, which are crucial in practical applications. Here, we present a synthetic approach to multi-segment linear-shaped nanopores with pre-designed morphologies inside anodic aluminium oxide (AAO), by tailoring the anodizing duration after a rational increase of the applied anodizing voltage and the number of voltage increase during Al foil anodization. Then, we achieve nanocontainers with designed morphologies, such as nanofunnels, nanobottles, nano-separating-funnels and nanodroppers, with tunable sizes and diverse materials of carbon, silicon, germanium, hafnium oxide, silica and nickel/carbon magnetic composite, by depositing a thin layer of materials on the inner walls of the pre-designed AAO nanopores. The strategy has far-reaching implications in the designing and large-scale fabrication of nanocontainers, opening up new opportunities in nanotechnology applications.
Acinetobacter phage genome is similar to Sphinx 2.36, the circular DNA copurified with TSE infected particles
Authors: Longkumer Toshisangba , Kamireddy Swetha , Muthyala Venkateswar Reddy , Akbarpasha Shaikh , Pitchika Gopi Krishna , Kodetham Gopinath , Ayaluru Murali , Siddavattam Dayananda 
Published: July 2013

AbstractWhile analyzing plasmids of Acinetobacter sp. DS002 we have detected a circular DNA molecule pTS236, which upon further investigation is identified as the genome of a phage. The phage genome has shown sequence similarity to the recently discovered Sphinx 2.36 DNA sequence co-purified with the Transmissible Spongiform Encephalopathy (TSE) particles isolated from infected brain samples collected from diverse geographical regions. As in Sphinx 2.36, the phage genome also codes for three proteins. One of them codes for RepA and is shown to be involved in replication of pTS236 through rolling circle (RC) mode. The other two translationally coupled ORFs, orf106 and orf96, code for coat proteins of the phage. Although an orf96 homologue was not previously reported in Sphinx 2.36, a closer examination of DNA sequence of Sphinx 2.36 revealed its presence downstream of orf106 homologue. TEM images and infection assays revealed existence of phage AbDs1 in Acinetobacter sp. DS002.
Gold Catalysis for Hydrogenation Reactions
Authors: Corma Avelino , Sabater María J. 
Published: July 2013

Gold has been shown to have potential advantages as a catalyst in a wide variety of chemical reactions, and hydrogenation is positioned as one important catalytic application of this metal. Indeed, hydrogenation is an important reaction in many areas of the chemical and petrochemical industries, where a continuous effort in searching for new catalysts and/or materials that efficiently adsorb and dissociate hydrogen is ever present.
Owing to the importance of the element, this chapter will cover essential aspects regarding the physico‐chemical properties of gold, its interactions with hydrogen, reactivity for the hydrogen H–D exchange, and in general, for selective hydrogenation reactions.
When appropriate, the chemical composition as well as the preparation of the catalyst will be specifically highlighted, because the catalytic activity appears to depend strongly on the method of synthesis of the catalyst, the nature of the support, the size of the gold particles and the thermal story of the catalyst.
Facile hydrothermal synthesis of ultra‐long manganese oxyhydroxide nanorods and their transformation into MnO2 and Mn2O3 nanorods
Authors: Li Zhong Chun , Chen Si Si , Dong Chao , Chen Xu Hong , Zhou Quan Fa 
Published: July 2013

Single‐crystal manganese oxyhydroxide (MnOOH) nanorods with high aspect ratios have been successfully prepared employing a simple hydrothermal route based on the redox between potassium permanganate (KMnO4) and polyvinyl pyrrolidone (PVP). By adjusting the reaction temperature, reaction time and the mass ratio of PVP/KMnO4, MnOOH nanorods with lengths up to 20 μm and diameters in the range of 100–400 nm could be facilely prepared in high yield. The as‐prepared MnOOH nanorods were characterised by X‐ray diffraction, scanning electron microscopy, transmission electron microscopy, high‐resolution transmission electron microscopy and Fourier transformed infrared spectroscopy. The formation mechanism of MnOOH nanorods was preliminarily discussed based on the Ostwald's ripening process. Furthermore, MnO2 and Mn2O3 nanorods with high aspect ratios were synthesised by calcination of MnOOH nanorods.
Fabrication of a substrate for Ag‐nanorod metal‐enhanced fluorescence using the oblique angle deposition process
Authors: Ju Jonghyun , Byeon Euihyeon , Han Yun‐ah , Kim Seok‐min 
Published: July 2013

Metal‐enhanced fluorescence (MEF) is a powerful technology to improve the sensitivity of fluorescence analysis by allowing fluorophores to interact with enhanced electromagnetic fields generated by the localised surface plasmon resonance effects of metallic nanostructures. To apply MEF technology to disposable DNA or protein microarray analysis, metallic nanostructures need to be fabricated on the full area of a glass slide at low cost. In this reported work an oblique angle deposition process was used to fabricate Ag nanorods on the whole area of a 25 × 75 mm2 glass slide to serve as an inexpensive and large‐area MEF substrate. To examine the feasibility of the proposed substrate and maximise signal enhancement, Ag nanorods with different lengths were deposited on glass slides. Different concentrations of streptavidin‐conjugated Cy5 in phosphate buffered saline were spotted onto the Ag nanorods and bare glass substrates, and the fluorescence signals were measured and compared. Longer Ag nanorods improved the fluorescence enhancement factor because of a higher surface plasmon resonance effect and the large surface area of the nanostructure with a high aspect ratio. A maximum enhancement factor of −23 was obtained from Ag nanorods that were 1000 nm long with comparable uniformity with the glass substrate.
SAPA tool: finding protein regions by combination of amino acid composition, scaled profiles, patterns and rules
Authors: Maier Josef , Adzhubei Alexei A. , Egge-Jacobsen Wolfgang 
Published: July 2013

Abstract
Summary: Functional modules within protein sequences are often extracted by consensus sequence patterns representing a linear motif; however, other functional regions may only be described by combined features such as amino acid composition, profiles of amino acid properties and randomly distributed short sequence motifs. If only a small number of functional examples are well characterized, the researcher needs a tool to extract similar sequences for further investigation.
Availability and Implementation: We provide the web application ‘SAPA tool’, which allows the user to search with combined properties, ranks the extracted target regions by an integrated score, estimates false discovery rates by using decoy sequences and provides them as a sequence file or spreadsheet. Source code, user manual and the web application implemented in Perl, HTML, CSS and JavaScript and running on Apache are freely available at http://sapa-tool.uio.no/sapa/
Contact: josef.maier@istls.de or w.m.egge-jacobsen@imbv.uio.no
Supplementary information: Supplementary data are available at Bioinformatics online.
Tiki, at the head of a new superfamily of enzymes
Authors: Sanchez-Pulido Luis , Ponting Chris P. 
Published: July 2013

Abstract
Summary: Tiki proteins appear to antagonize Wnt signalling pathway by acting as Wnt proteases, thereby affecting Wnt solubility by its amino-terminal cleavage. Tiki1 protease activity was shown to be metal ion-dependent and was inhibited by chelating agents and thus was tentatively proposed to be a metalloprotease. Nevertheless, Tiki proteins exhibit no detectable sequence similarity to previously described metalloproteases, but instead have been reported as being homologues of TraB proteins (Pfam ID: PF01963), a widely distributed family of unknown function and structure. Here, we show that Tiki proteins are members of a new superfamily of domains contained not just in TraB proteins, but also in erythromycin esterase (Pfam ID: PF05139), DUF399 (domain of unknown function 399; Pfam ID: PF04187) and MARTX toxins that contribute to host invasion and pathogenesis by bacteria. We establish the core fold of this enzymatic domain and its catalytic residues.
Contact: luis.sanchezpulido@dpag.ox.ac.uk
Supplementary information: Supplementary data are available at Bioinformatics online.
Recovery strategy for group service failures
Authors: Zhou Yuanyuan , Huang Minxue , S.L. Tsang Alex , Zhou Nan 
Published: July 2013

Purpose
– Consumers use cues to assess whether a recovery is effective. Prior literature on service recovery has focused mainly on individual-related factors. This paper aims to study how other consumers in the same failure and recovery influence an individual consumer to evaluate the firm
'
s recovery efforts.

Design/methodology/approach
– Two experiments were conducted. Experiment 1 tested the interaction effects between recovery modes (public vs private) and recovery dimensions (economic vs social) on an individual consumer
'
s evaluation of a recovery strategy for a group service failure. Experiment 2 investigated the complementary role of social recovery on economic compensation.

Findings
– Experiment 1 identified a significant interaction effect. Results suggest that an individual in a group service failure responds more favorably to public economic recovery than to private recovery. However, an individual
'
s reaction to social recovery follows the opposite pattern. Furthermore, in experiment 2 a complementary effect between economic recovery and social recovery was found.

Originality/value
– One potential contribution is that the paper sheds light on the issue related to the influence from other affected consumers in the same service failure and recovery situation in affected consumers
'
recovery evaluation. An individual will consider the recovery other individuals receive when he or she evaluates the recovery
'
s strategy. The paper also provides insight into the complementary use of economic and social recoveries to enhance a consumer
'
s evaluation of a firm
'
s overall recovery at a reduced cost.
The moderating effects of need for cognition on drivers of customer loyalty
Authors: Hansen Håvard , M. Samuelsen Bendik , E. Sallis James 
Published: July 2013

Purpose
– While satisfaction, value, image, and credibility are commonly assumed to drive customer loyalty, there is nevertheless reason to question whether their effects vary across groups of consumers. This paper seeks to explore how individuals with contrasting need-for-cognition (NFC) levels differ in using memory-based information when forming behavioral intentions towards a current service provider.

Design/methodology/approach
– The authors tested the hypotheses by means of survey data from customers of retail banks, and applied two-group analysis using structural equation modeling (SEM) to test the moderating effects of NFC.

Findings
– Satisfaction positively affects loyalty for high NFCs, but not for low NFCs. Image is insignificant in both groups. Value positively affects loyalty for low NFCs, but not for high NFCs. Credibility has a positive effect for low NFCs, but not for high NFCs.

Research limitations/implications
– The limited sample size affects the power of the test methodology, but Chow-tests of regression models gave similar results. Further research should test the model in other contexts to enhance external validity.

Practical Implications
– To develop more effective customer strategies, both researchers and practitioners need to understand how different types of consumers attend to and utilize information when forming behavioral intentions. The standard practice of surveying customer satisfaction and loyalty typically requires the consumer to make a memory-based judgment.

Originality/value
– Previous research has primarily focused on how consumer demographics moderate satisfaction-loyalty links. This paper includes additional drivers of loyalty, and assesses moderation by a personality trait (NFC) not previously used in satisfaction-loyalty research. The results indicate that a consumer
'
s dispositional tendency to think and elaborate (more or less) can bias survey results.
The effect of brand on churn in the telecommunications sector
Authors: B. Svendsen Gunnvald , K. Prebensen Nina 
Published: July 2013

Purpose
– The present paper aims to investigate the effect of network provider, customer demographics, customer satisfaction and perceived switch costs on churn in the mobile telecommunications market.

Design/methodology/approach
– The study is carried out as a longitudinal, two-wave study of mobile telecommunications customers in Norway: n=1,499 (wave 1) and n=976 (wave 2). Churn is measured as change in the mobile network provider between the two waves. The data are analysed as a logistic regression with the independent variables provider, gender, satisfaction, switch costs and age.

Findings
– The analysis shows significant effects of provider, satisfaction, switch costs and age and of the interaction between satisfaction and provider. Gender has no significant effect on churn. Provider effects are interpreted as effects of brand image since other known influences on churn (satisfaction, switch costs and demographics) have been controlled for in the design.

Research limitations/implications
– Further research is necessary in order to single out which brand aspects are responsible for the effects of brand ownership and to ensure the generality of the findings outside Scandinavia.

Practical implications
– The findings indicate that a strong brand image makes a company less susceptible to customer churn caused by low satisfaction.

Originality/value
– The relation between brand ownership and churn in the mobile telecommunications sector has not been reported previously.
Modeling and experimental verification of a flexible rotor/AMB system
Authors: Štimac Goranka , Braut Sanjin , Bulić Neven , Žigulić Roberto 
Published: July 2013

PurposeIn this paper, the aim is to present a modeling strategy for a flexible rotor/active magnetic bearing (AMB) system with non‐collocation. Special attention is paid to the vibration reduction and the stable passage through the first critical speed.Design/methodology/approachThe finite element method based on Euller‐Bernoulli beam theory is applied in the formulation of the rotor model. Since rotor/AMB systems are complex mechatronic systems, reduced order approach is used in the control system design. This study applies the modal decomposition method and the modal truncation method, thus retaining the lower order bending modes. The obtained numerical results are compared with the measured open loop frequency responses and the existing differences are compensated in order to obtain accurate numerical model.FindingsFrequency response of the entire system model (flexible shaft, actuators, power amplifiers and sensors) with amplitudes expressed in rotor lateral displacements can be verified by the measured frequency responses. The deviations in the amplitude and phase diagrams are then successfully corrected using the appropriate model modifications.Practical implicationsThe results of this research find direct applications in flexible rotors supported by AMBs, e.g. high speed spindles, turbo molecular pumps, flywheel energy storage systems, etc. The presented procedure can be especially valuable in the design of model based controllers.Originality/valueAn AMB system model is developed and presented in this paper, in conjunction with a systematic description of an efficient procedure for the elimination of the typical mismatches between the simulation and experiment. Firstly, rotor/AMB test rig is stabilized with an appropriately tuned PID controller and an open loop frequency response is obtained for such a system. This response is then compared to corresponding simulation results for which mismatches are identified and eliminated thus yielding an accurate model of the system.
Identification techniques of functions approximating magnetization characteristics of synchronous machines
Authors: Warzecha Adam , Mazgaj Witold 
Published: July 2013

PurposeThe aim of the paper is to present the approximation methods of the magnetizing characteristics of the salient pole synchronous machines with the fundamental MMF harmonics.Design/methodology/approachThe energy based approach is used to formulate a set of the functions approximating the magnetic flux linkages versus an equivalent magnetizing current in the circuit model of the synchronous machine. The estimation of the approximation functions parameters is based on the results of the field calculations.FindingsThe identification of the approximation functions is effective and significantly simpler on the basis of the magnetic field co‐energy function, than on the basis of the magnetic flux linkages.Research limitations/implicationsThe magnetic field co‐energy function determined by FEM is sufficient for simplified calculations of the magnetic parameters occurring in the circuit models of the electrical machines with nonlinear core.Practical implicationsThe paper provides guidance for the circuit modelling of the multi‐pole generators and motors under conditions of magnetic saturation.Originality/valueA paper has succeeded in determining the internal magnetic characteristics of the synchronous machine with a salient pole rotor.