bluuebunny/crossref_metadata_2025 huggingface dataset:
Scaled-down particle-in-cell simulation of cathode plasma expansion in magnetically insulated coaxial diode
Authors: Zhu Danni , Zhang Jun , Zhong Huihuang , Cai Dan
Published: March 2016

The expansion of cathode plasma in magnetically insulated coaxial diode (MICD) is investigated in theory and particle-in-cell (PIC) simulation. The temperature and density of the cathode plasma are about several eV and 1013–1016 cm−3, respectively, and its expansion velocity is of the level of few cm/μs. Through hydrodynamic theory analysis, expressions of expansion velocities in axial and radial directions are obtained. The characteristics of cathode plasma expansion have been simulated through scaled-down PIC models. Simulation results indicate that the expansion velocity is dominated by the ratio of plasma density other than the static electric field. The electric field counteracts the plasma expansion reverse of it. The axial guiding magnetic field only reduces the radial transport coefficients by a correction factor, but not the axial ones. Both the outward and inward radial expansions of a MICD are suppressed by the much stronger guiding magnetic field and even cease.
Vibrational infrared and Raman spectra of polypeptides: Fragments-in-fragments within molecular tailoring approach
Authors: Sahu Nityananda , Gadre Shridhar R.
Published: March 2016

The present work reports the calculation of vibrational infrared (IR) and Raman spectra of large molecular systems employing molecular tailoring approach (MTA). Further, it extends the grafting procedure for the accurate evaluation of IR and Raman spectra of large molecular systems, employing a new methodology termed as Fragments-in-Fragments (FIF), within MTA. Unlike the previous MTA-based studies, the accurate estimation of the requisite molecular properties is achieved without performing any full calculations (FC). The basic idea of the grafting procedure is implemented by invoking the nearly basis-set-independent nature of the MTA-based error vis-à-vis the respective FCs. FIF has been tested out for the estimation of the above molecular properties for three isomers, viz., β-strand, 310- and α-helix of acetyl(alanine)nNH2 (n = 10, 15) polypeptides, three conformers of doubly protonated gramicidin S decapeptide and trpzip2 protein (PDB id: 1LE1), respectively, employing BP86/TZVP, M06/6-311G**, and M05-2X/6-31G** levels of theory. For most of the cases, a maximum difference of 3 cm−1 is achieved between the grafted-MTA frequencies and the corresponding FC values. Further, a comparison of the BP86/TZVP level IR and Raman spectra of α-helical (alanine)20 and its N-deuterated derivative shows an excellent agreement with the existing experimental spectra. In view of the requirement of only MTA-based calculations and the ability of FIF to work at any level of theory, the current methodology provides a cost-effective solution for obtaining accurate spectra of large molecular systems.
A polarizable QM/MM approach to the molecular dynamics of amide groups solvated in water
Authors: Schwörer Magnus , Wichmann Christoph , Tavan Paul
Published: March 2016

The infrared (IR) spectra of polypeptides are dominated by the so-called amide bands. Because they originate from the strongly polar and polarizable amide groups (AGs) making up the backbone, their spectral positions sensitively depend on the local electric fields. Aiming at accurate computations of these IR spectra by molecular dynamics (MD) simulations, which derive atomic forces from a hybrid quantum and molecular mechanics (QM/MM) Hamiltonian, here we consider the effects of solvation in bulk liquid water on the amide bands of the AG model compound N-methyl-acetamide (NMA). As QM approach to NMA we choose grid-based density functional theory (DFT). For the surrounding MM water, we develop, largely based on computations, a polarizable molecular mechanics (PMM) model potential called GP6P, which features six Gaussian electrostatic sources (one induced dipole, five static partial charge distributions) and, therefore, avoids spurious distortions of the DFT electron density in hybrid DFT/PMM simulations. Bulk liquid GP6P is shown to have favorable properties at the thermodynamic conditions of the parameterization and beyond. Lennard-Jones (LJ) parameters of the DFT fragment NMA are optimized by comparing radial distribution functions in the surrounding GP6P liquid with reference data obtained from a “first-principles” DFT-MD simulation. Finally, IR spectra of NMA in GP6P water are calculated from extended DFT/PMM-MD trajectories, in which the NMA is treated by three different DFT functionals (BP, BLYP, B3LYP). Method-specific frequency scaling factors are derived from DFT-MD simulations of isolated NMA. The DFT/PMM-MD simulations with GP6P and with the optimized LJ parameters then excellently predict the effects of aqueous solvation and deuteration observed in the IR spectra of NMA. As a result, the methods required to accurately compute such spectra by DFT/PMM-MD also for larger peptides in aqueous solution are now at hand.
Auto-generation in wall turbulence by the interaction of weak eddies
Authors: Goudar Manu V. , Breugem W.-P. , Elsinga G. E.
Published: March 2016

For channel flow, we explore how commonly found weak eddies can still auto-generate and produce new eddies. Before, only strong eddies (above a threshold strength) were considered to auto-generate. Such strong eddies are rarely observed in actual turbulent flows however. Here, the evolution of two weak conditional eddies with different initial strengths, initial sizes, and initial stream-wise spacing between them is studied. The numerical procedure followed is similar to Zhou et al. [“Mechanisms for generating coherent packets of hairpin vortices in channel flow,” J. Fluid Mech. 387, 353 (1999)]. The two eddies are found to merge into a single stronger eddy when the initial upstream eddy is taller than the downstream eddy, which further auto-generates when the initial stream-wise separation is small (<120 wall units). However, it is observed that non-merging cases with small initial stream-wise separation also auto-generated. In the initial condition, the two conditional eddies are placed near to each other so their velocity fields (low-speed streaks and ejection events) get superimposed and amplified as a function of stream-wise spacing. To examine this effect, a divergence free low-speed streak is superimposed on an eddy. It is found that these low-speed streak simulations do not auto-generate. On the other hand, a rapid lift-up of an eddy by ejection events plays a role in the onset of auto-generation, which also leads to a modified interpretation of auto-generation mechanism. It differed from the existing auto-generation mechanism at the later stages of auto-generation where blockage of mean flow and shear layer deformation is considered instead of vortex dynamics.
Benchmark studies of the gyro-Landau-fluid code and gyro-kinetic codes on kinetic ballooning modes
Authors: Tang T. F. , Xu X. Q. , Ma C. H. , Bass E. M. , Holland C. , Candy J.
Published: March 2016

A Gyro-Landau-Fluid (GLF) 3 + 1 model has been recently implemented in BOUT++ framework, which contains full Finite-Larmor-Radius effects, Landau damping, and toroidal resonance [Ma et al., Phys. Plasmas 22, 055903 (2015)]. A linear global beta scan has been conducted using the JET-like circular equilibria (cbm18 series), showing that the unstable modes are kinetic ballooning modes (KBMs). In this work, we use the GYRO code, which is a gyrokinetic continuum code widely used for simulation of the plasma microturbulence, to benchmark with GLF 3 + 1 code on KBMs. To verify our code on the KBM case, we first perform the beta scan based on “Cyclone base case parameter set.” We find that the growth rate is almost the same for two codes, and the KBM mode is further destabilized as beta increases. For JET-like global circular equilibria, as the modes localize in peak pressure gradient region, a linear local beta scan using the same set of equilibria has been performed at this position for comparison. With the drift kinetic electron module in the GYRO code by including small electron-electron collision to damp electron modes, GYRO generated mode structures and parity suggest that they are kinetic ballooning modes, and the growth rate is comparable to the GLF results. However, a radial scan of the pedestal for a particular set of cbm18 equilibria, using GYRO code, shows different trends for the low-n and high-n modes. The low-n modes show that the linear growth rate peaks at peak pressure gradient position as GLF results. However, for high-n modes, the growth rate of the most unstable mode shifts outward to the bottom of pedestal and the real frequency of what was originally the KBMs in ion diamagnetic drift direction steadily approaches and crosses over to the electron diamagnetic drift direction.
Layer specific optical band gap measurement at nanoscale in MoS2 and ReS2 van der Waals compounds by high resolution electron energy loss spectroscopy
Authors: Dileep K. , Sahu R. , Sarkar Sumanta , Peter Sebastian C. , Datta R.
Published: March 2016

Layer specific direct measurement of optical band gaps of two important van der Waals compounds, MoS2 and ReS2, is performed at nanoscale by high resolution electron energy loss spectroscopy. For monolayer MoS2, the twin excitons (1.8 and 1.95 eV) originating at the K point of the Brillouin zone are observed. An indirect band gap of 1.27 eV is obtained from the multilayer regions. Indirect to direct band gap crossover is observed which is consistent with the previously reported strong photoluminescence from the monolayer MoS2. For ReS2, the band gap is direct, and a value of 1.52 and 1.42 eV is obtained for the monolayer and multilayer, respectively. The energy loss function is dominated by features due to high density of states at both the valence and conduction band edges, and the difference in analyzing band gap with respect to ZnO is highlighted. Crystalline 1T ReS2 forms two dimensional chains like superstructure due to the clustering between four Re atoms. The results demonstrate the power of HREELS technique as a nanoscale optical absorption spectroscopy tool.
Deterministic switching of a magnetoelastic single-domain nano-ellipse using bending
Authors: Liang Cheng-Yen , Sepulveda Abdon , Keller Scott , Carman Gregory P.
Published: March 2016

In this paper, a fully coupled analytical model between elastodynamics with micromagnetics is used to study the switching energies using voltage induced mechanical bending of a magnetoelastic bit. The bit consists of a single domain magnetoelastic nano-ellipse deposited on a thin film piezoelectric thin film (500 nm) attached to a thick substrate (0.5 mm) with patterned electrodes underneath the nano-dot. A voltage applied to the electrodes produces out of plane deformation with bending moments induced in the magnetoelastic bit modifying the magnetic anisotropy. To minimize the energy, two design stages are used. In the first stage, the geometry and bias field (Hb) of the bit are optimized to minimize the strain energy required to rotate between two stable states. In the second stage, the bit's geometry is fixed, and the electrode position and control mechanism is optimized. The electrical energy input is about 200 (aJ) which is approximately two orders of magnitude lower than spin transfer torque approaches.
Distinct mechanisms eliminate mother and daughter centrioles in meiosis of starfish oocytes
Authors: Borrego-Pinto Joana , Somogyi Kálmán , Karreman Matthia A. , König Julia , Müller-Reichert Thomas , Bettencourt-Dias Mónica , Gönczy Pierre , Schwab Yannick , Lénárt Péter
Published: March 2016

Centriole elimination is an essential process that occurs in female meiosis of metazoa to reset centriole number in the zygote at fertilization. How centrioles are eliminated remains poorly understood. Here we visualize the entire elimination process live in starfish oocytes. Using specific fluorescent markers, we demonstrate that the two older, mother centrioles are selectively removed from the oocyte by extrusion into polar bodies. We show that this requires specific positioning of the second meiotic spindle, achieved by dynein-driven transport, and anchorage of the mother centriole to the plasma membrane via mother-specific appendages. In contrast, the single daughter centriole remaining in the egg is eliminated before the first embryonic cleavage. We demonstrate that these distinct elimination mechanisms are necessary because if mother centrioles are artificially retained, they cannot be inactivated, resulting in multipolar zygotic spindles. Thus, our findings reveal a dual mechanism to eliminate centrioles: mothers are physically removed, whereas daughters are eliminated in the cytoplasm, preparing the egg for fertilization.
Amplification of actin polymerization forces
Authors: Dmitrieff Serge , Nédélec François
Published: March 2016

The actin cytoskeleton drives many essential processes in vivo, using molecular motors and actin assembly as force generators. We discuss here the propagation of forces caused by actin polymerization, highlighting simple configurations where the force developed by the network can exceed the sum of the polymerization forces from all filaments.
Conditional deletion of L1CAM in human neurons impairs both axonal and dendritic arborization and action potential generation
Authors: Patzke Christopher , Acuna Claudio , Giam Louise R. , Wernig Marius , Südhof Thomas C.
Published: March 2016

Hundreds of L1CAM gene mutations have been shown to be associated with congenital hydrocephalus, severe intellectual disability, aphasia, and motor symptoms. How such mutations impair neuronal function, however, remains unclear. Here, we generated human embryonic stem (ES) cells carrying a conditional L1CAM loss-of-function mutation and produced precisely matching control and L1CAM-deficient neurons from these ES cells. In analyzing two independent conditionally mutant ES cell clones, we found that deletion of L1CAM dramatically impaired axonal elongation and, to a lesser extent, dendritic arborization. Unexpectedly, we also detected an ∼20–50% and ∼20–30% decrease, respectively, in the levels of ankyrinG and ankyrinB protein, and observed that the size and intensity of ankyrinG staining in the axon initial segment was significantly reduced. Overexpression of wild-type L1CAM, but not of the L1CAM point mutants R1166X and S1224L, rescued the decrease in ankyrin levels. Importantly, we found that the L1CAM mutation selectively decreased activity-dependent Na+-currents, altered neuronal excitability, and caused impairments in action potential (AP) generation. Thus, our results suggest that the clinical presentations of L1CAM mutations in human patients could be accounted for, at least in part, by cell-autonomous changes in the functional development of neurons, such that neurons are unable to develop normal axons and dendrites and to generate normal APs.
An investigation of mobile payment (m-payment) services in Thailand
Authors: Phonthanukitithaworn Chanchai , Sellitto Carmine , Fong Michelle W.L.
Published: March 2016

Purpose

– Despite the significant efforts by the Thai Government to promote the use of mobile payment (m-payment) services, this new mode of financial payment has had limited consumer interest. Indeed, whilst it is seemingly desirable to facilitate the uptake of m-payment services given government promotion, limited research has been undertaken to examine the factors that might promote adoption. The purpose of this paper is to address this research gap.

Design/methodology/approach

– The study developed a conceptual model based on elements of innovation diffusion theory and technology acceptance. The model was empirically validated using structural equation modelling analysis using the responses gained from 529 Thai mobile phone users. The intercept interview/survey across eight different locations was the instrument used for data collection.

Findings

– The empirical results indicate that consumer adoption of m-payment services in Thailand was determined by four factors – compatibility, subjective norm, perceived trust, and perceived risk. Surprisingly, the construct of perceived usefulness, perceived ease of use, and perceived cost were found not to have a direct effect on behavioural intention.

Research limitations/implications

– The results regarding electronic payments highlight the importance of four factors that are fundamental in understanding consumer behaviour in regards to financial m-payments. The conceptual model developed in the study is well suited as a primary research framework to explore other aspect of technological innovation in a Thai context. Even though the model is not generalisable, it has the potential to be refined for use in other countries. The findings from the research contribute to the small, but growing number of studies focusing on technological business innovation in Thailand.

Practical implications

– The results of this study will be of value to various groups associated with m-payment services such as mobile network operators, financial institutions, and payment service providers. The findings will potentially inform appropriate service strategies and business models in order to improve the uptake of this type of financial payment by Thai consumers. The factors identified are significant in informing how the capacity of the Thai Government’s investment in electronic infrastructure could be more fully utilised.

Originality/value

– This study adds to the literature by bridging the gap in explaining consumer intentions to adopt new technological services amongst people who know about the service but have not adopted it as yet. Moreover, this paper is a pioneer study about the adoption of m-payment services in Thai setting.
Using RBM approach in managing projects beyond the development sector
Authors: Ssegawa Joseph Kaggwa , Muzinda Mark
Published: March 2016

Purpose

– Result-based management (RBM) is common approach used in the development sector to initiate, plan and implement projects. However, to the knowledge of the authors the approach has hardly been used in delivering projects in other sectors, for example, information technology, infrastructure or business. The purpose of this paper is to document a case study in which the RBM approach was used to guide the delivery of a business project in Botswana.

Design/methodology/approach

– A case study strategy was used to document the delivery process of the project. Data were collected from a variety of sources that included review of documents, interviews, focus discussions and a site visit. The content analysis technique was used to analyse the collected data.

Findings

– The case illustrates the possibility of using the RBM approach to initiate, plan and implement a project in the business sector.

Research limitations/implications

– Being a case study, the approach needs to be tested with more case studies.

Practical implications

– Apart from illustrating the possible use of RBM approach, the paper illustrates systematic processes used in the case study for project delivery. It also outlines some of the resultant challenges which may be appreciated by practitioners, academics and trainees.

Originality/value

– The use of RBM approach in guiding the delivery of a business project.
Brand analysis of global and local banks in India: a study of young consumers
Authors: Srivastava Ankur , Dey Dipanjan Kumar
Published: March 2016

Purpose

The purpose of this study is to investigate the perceived differences in brand analysis dimensions, such as brand-specific association (represented by perceived brand quality, brand price, brand emotional value and brand social value), brand impressions (represented by perceived brand image and general brand awareness) and brand credibility (represented by perceived brand trustworthiness and brand expertise), for young consumers in the context of banking services in India. All three types of banks operating in the Indian market are compared: state-owned banks, private (Indian) banks and global (foreign) banks.

Design/methodology/approach

The authors follow a cross-sectional design in this study. A structured questionnaire is created with the help of well-established scales. Reliability and validity tests are performed on all the dimensions of the scale. Exploratory factor analysis, ANOVA and ordinary least squared multiple regression analysis are performed to test the proposed hypotheses empirically.

Findings

The authors report significant differences in perceptions among young consumers among the three types of banks for all the dimensions of brand-specific associations, that is, perceived quality, perceived price, perceived brand social value and perceived brand emotional value. The authors find partial support for the hypotheses presented in this study concerning differences in three bank types among young consumers related to general brand impressions and brand credibility.

Practical implications

The results provide insights on the perceptions of the global and local brands among young consumers in the context of the banking industry. This will aid practitioners in assessing the relative position of their brands with respect to their global/local counterparts. These insights would help brand managers to design effective marketing mix strategies to target the young Indian consumers more effectively.

Originality/value

This is the first study that includes the concept of brand credibility along with brand-specific associations and general brand impression in investigating purchase intention of banking services by young consumers.
Using a semantic wiki for technology forecast and technology monitoring
Authors: Färber Michael
Published: March 2016

Purpose

– The purpose of this paper is to present extensions of Semantic MediaWiki for the purpose of technology forecast and technology monitoring. The user friendliness and applicability of the components is evaluated by task-based user studies.

Design/methodology/approach

– Based on the requirements given by potential end users (technology experts), visualization possibilities were designed and implemented. Potential users used the new features of technology forecast and monitoring within a semantic wiki and were controlled regarding the effectiveness.

Findings

– Although semantic wikis are ideal tools for knowledge management in industry settings, especially due to their user-friendly way of storing and retrieving knowledge, they have rarely been used for technology forecast and monitoring purposes so far. The authors show that the additional requirements for such purposes can be met and provide established technology analysis possibilities within Semantic MediaWiki. In that way, a new application area of Semantic MediaWiki is introduced.

Originality/value

– Tools and techniques for Semantic MediaWiki are presented, opening the application area of Semantic MediaWiki for technology and innovation management. The research provides evidence that the open-source implemented visualization and storage techniques can be applied in real-world settings, where so far mainly costly dedicated software has had to be used.
A hybrid PSO with Naïve Bayes classifier for disengagement detection in online learning
Authors: T GopalaKrishnan , Sengottuvelan P
Published: March 2016

Purpose

– The ultimate objective of the any e-Learning system is to meet the specific need of the online learners and provide them with various features to have efficacious learning experiences by understanding their complexities. Any e-Learning system could be much more improved by tracking students commitment and disengagement on that course, in turn, would allow system to have personalized involvements at appropriate times in order to re-engage learners. Motivations play a important role to get back the learners on the track could be done by analyzing of several attributes of the log files. This paper aims to analyze the multiple attributes which cause the learners to disengage from an online learning environment.

Design/methodology/approach

– For this improvisation, Web based learning system is researched using data mining techniques in education. There are various attributes characterized for the disengagement prediction using web log file analysis. Though, there have been several attempts to include motivating characteristics in e-Learning systems are adapted, presently influence on cognition is acknowledged mostly.

Findings

– Classification is one of the predictive data mining technique which makes prediction about values of data using known results found from different data sets. To find out the optimal solution for identifying disengaged learners in the online learning systems, Naive Bayesian (NB) classifier with Particle Swarm Optimization (PSO) algorithm is used which will classify the data set and then perform the independent analysis.

Originality/value

– The experimental results shows that the use of unrelated variables in the class attributes will reduce the accuracy and reliability of a any classification model. However, the hybrid PSO algorithm is clearly more apt to find minor subsets of attributes than the PSO with NB classifier. The NB classifier combined with hybrid PSO feature selection method proves to be the best feature selection capability without degrading the classification accuracy. It is further proved to be an effective method for mining large structural data in much less computation time.
Adoption of DSpace by Indian libraries
Authors: Cherukodan Surendran , S Humayoon Kabir
Published: March 2016

Purpose

– India occupies second position among the countries that have adopted DSpace open source software for institutional repositories (IRs)/digital libraries (DLs). The purpose of this paper is to examine the reasons for DSpace being preferred over other software. It inspects various instances of Indian web-based DSpace systems including the nature and growth of collection, the geographical distribution of DSpace systems and the types of institutions that adopt and maintain DSpace.

Design/methodology/approach

– Data were collected from the official website of DSpace, Google search and from online discussion forums during July 2013 to January 2014. The 132 Indian DSpace links provided in the official DSpace website were examined. Further search was carried out on Google to identify Indian IRs and DLs that are not listed by the official website. A list of Indian DSpace websites prepared by the authors was sent to the online discussion forums for further updating. An online directory of Indian DSpace websites was created using WordPress which provided for the adding of comments. The study is limited to the web-based DSpace IRs and DLs in India.

Findings

– The majority of the Indian IRs and DLs listed on the official website of DSpace are not visible on the internet. Many links lead to institution websites, commercial websites and personal pages of authors. Out of 132 DSpace links, only 55 are visible on the internet to search and use. Indian libraries prefer DSpace over EPrints, Fedora and Greenstone. Many institutions could not maintain continuity of their DSpace systems in the online environment. Institutions having more funding are maintaining web-based DSpace systems. The size, economic conditions, rate of literacy and number of universities in an Indian state do not influence the maintenance of digital systems. Academic institutions involving universities, technical institutions and colleges lead in the adoption and maintenance of web-based DSpace in India. Private universities and colleges have adopted DSpace for IR/DL. Public libraries constitute a minimum percentage of web-based DSpace instances. Indian courts and Parliament have adopted DSpace. Shodhganga, the Indian ETD project, is running on DSpace.

Originality/value

– This is the first paper examining the adoption of DSpace by Indian libraries with a focus on online visibility and the strength of collection. It can be used to understand the pattern of technology adoption by Indian libraries over the years.
Balancing instructional techniques and delivery formats in capstone business strategy courses
Authors: Alstete Jeffrey W. , Beutell Nicholas J.
Published: March 2016

Purpose

– The purpose of this paper is to contend that collegiate programs should carefully plan their capstone courses in light of the educational mission, pedagogical content knowledge, instructional techniques and delivery formats.

Design/methodology/approach

– This is a concept paper with elements of theory building from the case of business strategy courses. After an overview of relevant research along with past and current practices, capstone course content projects and assignments are discussed in relation to delivery formats such as on-campus, hybrid partial online and full distance education.

Findings

– Faculty and academic departments choosing project assignments should seek to create an integrative learning experience for students using carefully balanced delivery methods and content. Each of the instructional methods and delivery systems have certain advantages, and the use of these techniques is not mutually exclusive, in that some faculty members may choose to teach course sections using multiple learning systems.

Originality/value

– As colleges and universities increase the range of instructional techniques and delivery formats, it is especially important to harmonize these methods with learning objectives for capstone learning experiences. Concepts for balanced integration and synthesis of topics are proposed for different instructional methods and delivery formats that can be applied in other disciplines. Using pedagogical content knowledge as a basis for improving teaching and learning is necessary to achieve balanced integration.
Relapsed or poorly responsive nodular lymphocyte predominant Hodgkin lymphoma in children and adolescents – a report from the United Kingdom's Children's Cancer and Leukaemia Study Group
Authors: Shankar Ananth G. , Kirkwood Amy A. , Depani Sarita , Bianchi Eleonora , Hayward Janis , Ramsay Alan D. , Hall Georgina W.
Published: March 2016

There is a paucity of data on the treatment outcome in children with relapsed or poorly responsive nodular lymphocyte predominant Hodgkin lymphoma (nLPHL). This retrospective report evaluates the treatment outcome in a national cohort of children with relapsed or poorly responsive nLPHL. A total of 37 patients, 22 with relapsed and 15 with poorly responding disease, are the subjects of this report. Of the 22 patients with relapsed nLPHL, 11 had relapsed after primary excision biopsy, 10 after chemotherapy and 1 after chemotherapy and involved field radiotherapy. The majority had localized disease at relapse. The median time to relapse was 8 months after chemotherapy and 11 months after excision biopsy. Seven of the 15 patients with poorly responding nLPHL had variant histology. Three patients with initial poor response did not receive any further treatment and have had no disease progression. Transformation to diffuse large B cell lymphoma, in addition to evolution from typical to variant nLPHL occurred in one patient each. Thirty‐four patients have been successfully re‐treated with second chemotherapy or radiotherapy. Multiple relapses were uncommon but treatable. Relapse or poorly responsive nLPHL is fully salvageable with either additional chemotherapy and or radiotherapy.
Occipital Neuralgia Diagnosis and Treatment: The Role of Ultrasound
Authors: Narouze Samer
Published: March 2016

Background

Occipital neuralgia is a form of neuropathic type of pain in the distribution of the greater, lesser, or third occipital nerves. Patients with intractable occipital neuralgia do not respond well to conservative treatment modalities. This group of patients represents a significant therapeutic challenge and may require interventional or invasive therapeutic approaches.

Purpose

Occipital neuralgia frequently occurs as a result of nerve entrapment or irritation by a tight muscle or vascular structure, or nerve trauma during whiplash injury.

Although the entrapment theory is most commonly accepted, it lacks strong clinical evidence to support it. Accordingly, the available interventional approaches have been targeting the accessible part of the occipital nerve rather than the entrapped part.

Conclusion

Bedside sonography is an excellent imaging modality for soft tissue structures. Ultrasound not only allows distinguishing normal from abnormal entrapped occipital nerves, it can identify the level and the cause of entrapment as well. Ultrasound guidance allows precise occipital nerve blocks and interventions at the level of the “specific” entrapment location rather than into the site of “presumed” entrapment.
EFP Delphi study on the trends in Periodontology and Periodontics in Europe for the year 2025
Authors: Madianos Phoebus , Papaioannou William , Herrera David , Sanz Mariano , Baeumer Amelie , Bogren Anna , Bouchard Philippe , Chomyszyn‐Gajewska Maria , Demirel Korkud , Gaspersic Rok , Giurgiu Marina , Graziani Filippo , Jepsen Karin , Jepsen Sören , O′Brien Tiernan , Polyzois Ioannis , Preshaw Philip M. , Rakic Mia , Reners Michele , Rincic Nives , Stavropoulos Andreas , Sütcü Serdar , Verner Christian , Llodra Juan Carlos
Published: March 2016

Aim

The aim was to assess the potential trends in Periodontology and Periodontics in Europe that might be anticipated by the year 2025, using the Delphi method.

Material and Methods

The expert opinion of 120 experts was sought through the use of an open‐ended questionnaire, developed by an advisory group, containing 40 questions concerning the various trends in periodontology.

Results

The experts (113 responders) expect a stabilization of the prevalence of periodontitis, both for the chronic as well as the aggressive cases, but an increase in implant‐related diseases up to the year 2025. Concurrently, the importance of implants is seen to be increasing. They foresee an increased demand for postgraduate periodontology and implantology training. This is mirrored in an increase in publications for implant dentistry and increase in demand and need for training. Concerning the patients, better‐informed individuals seeking more routine check‐ups are expected.

Conclusion

A continued need for specialized periodontists, but also well trained dental practitioners is foreseen for next decade in Europe. Apart from periodontology they will be increasingly exposed to and trained in implant dentistry.
The challenges for scientific publishing, 60 years on
Authors: Hausmann Laura , Murphy Sean P. ,   the Publication Committee of the International Society for Neurochemistry (ISN)
Published: March 2016

The most obvious difference in science publishing between ‘then’ and ‘now’ is the dramatic change in the communication of data and in their interpretation. The democratization of science via the Internet has brought not only benefits but also challenges to publishing including fraudulent behavior and plagiarism, data and statistics reporting standards, authorship confirmation and other issues which affect authors, readers, and publishers in different ways. The wide accessibility of data on a global scale permits acquisition and meta‐analysis to mine for novel synergies, and has created a highly commercialized environment. As we illustrate here, identifying unacceptable practices leads to changes in the standards for data reporting.

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In the past decades, science publishing underwent dramatic changes in the communication of data and in their interpretation, in the increasing pressure and commercialization, and the democratization of science on a global scale via the Internet. This article reviews the benefits and challenges to publishing including fraudulent behavior and plagiarism, data and statistics reporting standards, authorship confirmation and other issues, with the aim to provide readers with practical examples and hands‐on guidelines. As we illustrate here, identifying unacceptable practices leads to changes in the standards for data reporting.

This article is part of the 60th Anniversary special issue.
A SURVEY OF THE LITERATURE ON ENVIRONMENTAL INNOVATION BASED ON MAIN PATH ANALYSIS
Authors: Barbieri Nicolò , Ghisetti Claudia , Gilli Marianna , Marin Giovanni , Nicolli Francesco
Published: March 2016

This paper reviews the literature on environmental innovation (EI) and systematizes it by means of an original methodology identifying the main directions in which the literature on EI has developed over time. In order to do so, two algorithms are adopted and used to analyse a citation network of journal articles and books. The main path analysis reveals that this literature revolves around the following topics: i) determinants of EI; ii) economic effects of EI; iii) environmental effects of EI and iv) policy inducement of EI. Each of these topics is discussed and implications from the main findings as well as possible future research extensions are outlined.
Effect of the Addition of Alhydwan Seed Flour on the Dough Rheology, Bread Quality, Texture Profile and Microstructure of Wheat Bread
Authors: Ammar Al‐Farga , Zhang Hui , Siddeeg Azhari , Chamba M.V.M , Kimani B.G. , Hassanin Hinawi , Obadi Mohammed , Alhejj Nabil
Published: March 2016

In our study, we evaluated the substitution effect of 5, 10 and 15% of the wheat flour by alhydwan flour on dough rheology, texture profile analysis, bread volume, color, sensory evaluation and bread quality. The farinograph characteristics of the alhydwan containing doughs portrayed higher water absorption, while development and stability time was greatly reduced. In addition, there was a remarkable reduction of the degree of softening of the dough at 5% supplementation of the alhydwan flour. Extensograph measurements clearly demonstrated increased dough resistance and the ratio of resistance to extension and extensibility (R/E) and a reduction in extensibility and energy value after the supplementation of alhydwan flour. Texture analysis attested to the enhanced springiness and cohesiveness of the alhydwan enriched bread while chewiness, gumminess, adhesiveness and hardness decreased. The highest score in the sensory evaluation was recorded at 10% supplementation of the alhydwan flour.

Practical Applications

Our results indicated that alhydwan flour it is could be incorporated into bread to improvement in dough rheology, bread quality and could be used act as improver to extend the shelf life for few hours and consequently reduce the economic loss caused by bread staling.
The role of phosphorus, magnesium and potassium availability in soil fungal exploration of mineral nutrient sources in Norway spruce forests
Authors: Rosenstock Nicholas P. , Berner Christoffer , Smits Mark M. , Krám Pavel , Wallander Håkan
Published: March 2016

We investigated fungal growth and community composition in buried meshbags, amended with apatite, biotite or hornblende, in Norway spruce (Picea abies) forests of varying nutrient status. Norway spruce needles and soil collected from forests overlying serpentinite had low levels of potassium and phosphorus, those from granite had low levels of magnesium, whereas those from amphibolite had comparably high levels of these nutrients.

We assayed the fungal colonization of meshbags by measuring ergosterol content and fungal community with 454 sequencing of the internal transcribed spacer region. In addition, we measured fine root density.

Fungal biomass was increased by apatite amendment across all plots and particularly on the K‐ and P‐deficient serpentinite plots, whereas hornblende and biotite had no effect on fungal biomass on any plots. Fungal community (total fungal and ectomycorrhizal) composition was affected strongly by sampling location and soil depth, whereas mineral amendments had no effect on community composition. Fine root biomass was significantly correlated with fungal biomass.

Ectomycorrhizal communities may respond to increased host‐tree phosphorus demand by increased colonization of phosphorus‐containing minerals, but this does not appear to translate to a shift in ectomycorrhizal community composition. This growth response to nutrient demand does not appear to exist for potassium or magnesium limitation.
A Michelson-type radio interferometer for university education
Authors: Koda Jin , Barrett James , Shafto Gene , Slechta Jeff , Hasegawa Tetsuo , Hayashi Masahiko , Metchev Stanimir
Published: March 2016

We report development of a simple and affordable radio interferometer suitable as an educational laboratory experiment. The design of this interferometer is based on the Michelson and Pease stellar optical interferometer, but instead operates at the radio wavelength of ∼11 GHz (∼2.7 cm), requiring much less stringent optical accuracy in its design and use. We utilize a commercial broadcast satellite dish and feedhorn with two flat side mirrors that slide on a ladder, providing baseline coverage. This interferometer can resolve and measure the diameter of the Sun, even on a day with marginal weather. Commercial broadcast satellites provide convenient point sources for comparison to the Sun's extended disk. The mathematical background of an adding interferometer is presented, as is its design and development, including the receiver system, and sample measurements of the Sun. Results from a student laboratory report are shown. With the increasing importance of interferometry in astronomy, the lack of educational interferometers is an obstacle to training the future generation of astronomers. This interferometer provides the hands-on experience needed to fully understand the basic concepts of interferometry.
The evolution of oscillator wave functions
Authors: Andrews Mark
Published: March 2016

We investigate how wave functions evolve with time in the harmonic oscillator. We first review the periodicity properties over each multiple of a quarter of the classical oscillation period. Then we show that any wave function can be simply transformed so that its centroid, defined by the expectation values of position and momentum, remains at rest at the center of the oscillator. This implies that we need only consider the evolution of this restricted class of wave functions; the evolution of all others can be reduced to these. The evolution of the spread in position Δx and momentum Δp throws light on energy and uncertainty and on squeezed and coherent states. Finally, we show that any wave function can be transformed so that Δx and Δp do not change with time and that the evolution of all wave functions can easily be found from the evolution of those at rest at the origin with unchanging Δx and Δp.
Software for real-time localization of baleen whale calls using directional sonobuoys: A case study on Antarctic blue whales
Authors: Miller Brian S. , Calderan Susannah , Gillespie Douglas , Weatherup Graham , Leaper Russell , Collins Kym , Double Michael C.
Published: March 2016

Directional frequency analysis and recording (DIFAR) sonobuoys can allow real-time acoustic localization of baleen whales for underwater tracking and remote sensing, but limited availability of hardware and software has prevented wider usage. These software limitations were addressed by developing a module in the open-source software PAMGuard. A case study is presented demonstrating that this software provides greater efficiency and accessibility than previous methods for detecting, localizing, and tracking Antarctic blue whales in real time. Additionally, this software can easily be extended to track other low and mid frequency sounds including those from other cetaceans, pinnipeds, icebergs, shipping, and seismic airguns.
Understanding frequency-compressed Mandarin sentences: Role of vowels
Authors: Chen Fei , Chan Fiona W. S.
Published: March 2016

Frequency compression (FC) is an effective alternative to conventional amplification for patients with severe-to-profound middle- and high-frequency hearing loss and with some residual low frequency hearing. The present work investigated the underlying factors accounting for the intelligibility of FC-processed speech. Eighteen normal-hearing participants listened to FC-processed Mandarin sentences, and testing conditions included two compression strategies (i.e., linear and nonlinear), four degrees of compression, and two segmental conditions (i.e., vowel-center and vowel-onset). Results showed that the nonlinear strategy outperformed the linear strategy in enhancing the intelligibility of FC-processed sentences. A small frequency range of source compression region involved a lesser degree of compression, and favored a higher intelligibility score. Vowel segments carried a large amount of intelligibility information contained in nonlinearly frequency-compressed sentences, but could not fully account for the intelligibility improvement from nonlinear frequency-compression. The intelligibility benefit of FC-processed Mandarin sentences may be partially attributed to the additional F1-F2 transitional spectral envelope cue provided by nonlinear FC with the F1-included spectral region preserved.
Twitter in the Press Box: How a New Technology Affects Game-Day Routines of Print-Focused Sports Journalists
Authors: Roberts Chris , Emmons Betsy
Published: March 2016

Sports journalists’ use of Twitter to cover live events raises questions related to institutional practices, the increased “branding” of journalists, and the work patterns and work products of journalists on a game day. College football was used as the sample sport for the researchers to analyze 2,600 tweets sent by 51 print-focused journalists covering 11 college football games on 1 Saturday. Provi ding contextual insight, the researchers interviewed 10 of the subject journalists to discern how they use Twitter for game-day coverage. Results indicate a more opinion-based use of Twitter during live reporting, shifts in reporting and writing routines, and widely varied opinions about social media’s effects on sports journalism.
Development of syndrome of inappropriate antidiuretic hormone secretion (SIADH) after Onyx embolisation of a cavernous carotid fistula
Authors: Chen Tsinsue , Kalani M Yashar S , Ducruet Andrew F , Albuquerque Felipe C , McDougall Cameron G
Published: March 2016

Patients with cavernous carotid fistulas (CCFs) can present with pituitary hypoperfusion and hypopituitarism; however, there are no previous reports of pituitary or hormonal abnormalities developing after CCF embolisation in an asymptomatic patient. We describe a patient with no hormonal abnormalities who developed syndrome of inappropriate antidiuretic hormone (SIADH) secretion after CCF embolisation. The patient had bilateral indirect CCFs, which were completely embolised via a transvenous approach, and was neurologically stable postoperatively and discharged. In the subsequent 2 weeks the patient was readmitted twice for acute hyponatraemia and a tonic-clonic seizure. Laboratory studies revealed severe SIADH. Clinical status and sodium levels improved after treatment. One year later the patient was weaned off all medications and remained neurologically stable. SIADH may be a delayed phenomenon after CCF embolisation. Given the proximity of embolised vessels to the pituitary's vascular supply, CCF treatment may result in flow disturbance, ischaemia and hormonal abnormalities.