bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cerebral Autoregulation, CSF outflow resistance and outcome following CSF diversion in Normal Pressure Hydrocephalus
Authors: Lalou Afroditi Despina , Czosnyka Marek , Donnelly Joseph , Pickard John D. , Nabbanja Eva , Keong. Nicole , Garnett Matthew , Czosnyka Zofia 
Published: November 2017

AbstractIntroductionNormal pressure hydrocephalus (NPH) is not simply the result of a disturbance in cerebrospinal fluid (CSF) circulation, but often includes cardiovascular comorbidity and abnormalities within the cerebral mantle. In this study, we have examined the relationship between the global autoregulation pressure reactivity index (PRx), the profile of disturbed CSF circulation and pressure-volume compensation, and their possible effects on outcome after surgery.Materials and methodsWe studied a cohort of 131 patients, investigated for possible NPH. Parameters describing CSF compensation and circulation were calculated during the cerebrospinal fluid (CSF) infusion test and PRx was calculated from CSF pressure and arterial pressure recordings. A simple scale was used to mark the patients’ outcome 6 months after surgery (improvement, temporary improvement, and no improvement).ResultsPRx was negatively correlated with Rout (R=−0.18; p=0.044); patients with normal CSF circulation tended to have worse autoregulation. The correlation for patients who were surgically-managed (N=83) was: R=−0.28; p=0.03, and stronger in patients who improved after surgery (N=64; R=−0.36; p=0.03). In patients who did not improve, the correlation was not significantly different from zero (N= 19; R=0.17; p=0.15). There was a trend towards higher values for PRx in non-responders than in responders (PRx =0.16+/− 0.04 vs 0.09 +/−0.02 respectively; p=0.061), associated with higher MAP values (107.2+/−8.2 in non-responders vs 89.5+/−3.5 in responders; p=0.195). The product of MAP* (1+PRx), proposed as a measure of combined arterial hypertension and deranged autoregulation, showed a significant association with outcome (greater value in non-responders; p=0.013).ConclusionAutoregulation proves to associate with cerebrospinal fluid circulation, and appears strongest in shunt responders. Outcome following CSF diversion is possibly most favorable when CSF outflow resistance is increased and global cerebral autoregulation is intact, in combination with arterial normotension.
Nuclear Export Through Nuclear Envelope Remodeling inSaccharomyces cerevisiae
Authors: Ding Baojin , Mirza Anne M. , Ashley James , Budnik Vivian , Munson Mary 
Published: November 2017

ABSTRACTIn eukaryotes, subsets of exported mRNAs are organized into large ribonucleoprotein (megaRNP) granules. How megaRNPs exit the nucleus is unclear, as their diameters are much larger than the nuclear pore complex (NPC) central channel. We previously identified a non-canonical nuclear export mechanism inDrosophila(Speese et al.,Cell2012) and mammals (Ding et al., in preparation), in which megaRNPs exit the nucleus by budding across nuclear envelope (NE) membranes. Here, we present evidence for a similar pathway in the nucleus of the budding yeast S.cerevisiae, which contain morphologically similar granules bearing mRNAs. Wild-type yeast displayed these granules at very low frequency, but this frequency was dramatically increased when the non-essential NPC protein Nup116 was deleted. These granules were not artifacts of defective NPCs; a mutation in the exportinXPO1(CRM1), in which NPCs are normal, induced similar megaRNP upregulation. We hypothesize that a non-canonical nuclear export pathway, analogous to those observed inDrosophilaand in mammalian cells, exists in yeast, and that this pathway is upregulated for use when NPCs or nuclear export are impaired.SUMMARYDing et al., describe a non-canonical mRNA export pathway in budding yeast similar to that observed inDrosophila. This pathway appears upregulated when the NPC is impaired, nuclear envelope integrity is disrupted, or the export factor Xpo1 (CRM1) is defective.
Utilization PPP method in aircraft positioning in post-processing mode
Authors: Krasuski Kamil , Wierzbicki Damian , Jafernik Henryk 
Published: November 2017

Purpose
The purpose of this paper is to study the implementation of GNSS technique in aviation for recovery of aircraft’s position using Precise Point Positioning (PPP) method.

Design/methodology/approach
The aircraft’s coordinates in ellipsoidal frame were obtained based on GPS code and phase observations for PPP method. The numerical computations were executed in post-processing mode in the CSRS-PPP and magicPPP online services. The mathematical scheme of PPP method was development using indifference equations of Ionosphere-Free linear combination. In the experiment, airborne test using Cessna 172 aircraft on June 01, 2010 in the military airport in Deblin was realized. The aircraft’s position was determined using data from GNSS receiver (Topcon HiperPro with interval of 1 s).

Findings
In this paper, the accuracy of aircraft’s position is better than 0.07 m for CSRS-PPP service and better than 0.27 m for magicPPP service. In case of the Mean Radial Spherical Error parameter, the average value for CSRS-PPP service equals to 0.01 m, whereas for magicPPP, it is about 0.38 m. The values of vertical coordinate of Cessna 172 aircraft were also checked with results of Real Time Kinematic–On The Fly technique.

Research limitations/implications
In this paper, the analysis of aircraft positioning is focused on the application of the PPP method in post-processing mode. In near real time, the PPP method still has limitations, especially in the area of ambiguity resolution and also instrumental biases (e.g. Narrow Lane Hardware Delays).

Practical implications
The PPP method can be applied in aviation in post-processing mode for verification of true aircraft coordinates and elimination of blunder errors from adjustment processing of GNSS observations. The Zenith Wet Delay term as a product of troposphere delay and receiver clock bias as a product of precise time transfer can be obtained in the PPP method.

Originality/value
The paper presents that the PPP method is an alternative solution for the recovery of aircraft’s position in aviation, and this method can be also applied in the positioning of aircraft based on GLONASS or GPS/GLONASS data.
Aircraft test of engineered material arresting system
Authors: Yao Hong-Yu , Kong Xiang-Jun , Shi Ya-Jie , Xiao Xian-Bo , Le Ning-Ning 
Published: November 2017

Purpose
Engineered material arresting systems (EMASs) are dedicated to stopping aircraft that overrun the runway before they enter dangerous terrain. The system consists of low-strength foamed concretes. The core component of the arresting system design is a reliable simulation model. Aircraft test verification is required before the practical application of the model. This study aims to propose a simulation model for the arresting system design and conducts serial verification tests.

Design/methodology/approach
Six verification tests were conducted using a Boeing 737 aircraft. The aircraft was equipped with an extra inertia navigation system and a strain gauge system to measure its motion and the forces exerted on the landing gears. The heights of the arrestor beds for these tests were either 240 or 310 mm, and the entering speeds of the aircraft ranged from 23.9 to 60.6 knots.

Findings
Test results revealed that both the aircraft and the pilots on board were safe after the tests. The maximum transient acceleration experienced by the dummies on board was 2.5 g, which is within the human tolerance. The model exhibited a satisfied accuracy to the field tests, as the calculation errors of the stopping distances were no greater than 7 per cent.

Originality/value
This study proposes a simulation model for the arresting system design and conducts serial verification tests. The model can be used in EMAS design.
Aircraft wing design at low speeds using Taguchi method
Authors: Soylak Mustafa , Karagöz Gökçe Nurseda , Topal Eyüp Sabri 
Published: November 2017

Purpose
The purpose of this paper is to determine the impact level of parameters affecting wing design at low speeds using Taguchi method.

Design/methodology/approach
Using brain storming approach airfoil shape, wing angle of attack and Reynolds number are determined as important wing design parameters. Most important parameters over these parameters are determined using Taguchi method. The lift-to-drag ratio (CL/CD ratio) is chosen as the performance criterion and L8 orthogonal index is chosen as experimental study scheme for this study.

Findings
Experimental results are examined using Taguchi method. After making experiments and also analyses, Reynolds number is found as the most important and identifier parameter for aircraft wing design.

Practical implications
Taguchi method makes the experimental design for experimental studies. This method reduces the number of experiments substantially using orthogonal indices while keeping effects of uncontrolled parameters to a minimum. Reduction in number of experiments helps save time and also cost.

Originality/value
In this study, with less number of experiments, the most important parameter for aircraft wing design is determined. Moreover, with less number of experiments, not only is time saved but the design stage is also made faster.
Comparison of 1D and 3D thermal models of the nacelle ventilation system in a small airplane
Authors: Łapka Piotr , Bakker Marije , Furmański Piotr , van Tongeren Hans 
Published: November 2017

Purpose
Insight in the temperature distribution on the internal and external surface of the nacelle is of great importance during the design phase of an aircraft. However, detailed information is not always needed. In a preliminary project stage or during parametric optimization, short analysis times are often more crucial than high accuracy. In such cases, the global insight in the temperature levels suffices to gain understanding of the relevance and influence of certain parameters. Nevertheless, estimating the maximum temperature for the most adverse conditions should also be done before a prototype is built. Therefore, this study aims to present and compare a simplified and an advanced methodology for the analysis of engine bay cooling and ventilation systems as well as heat transfer in the nacelle in a small airplane equipped with a turboprop engine in the tractor arrangement.

Design/methodology/approach
Both approaches included conductive, convective and radiative heat transfer in the engine bay of the small airplane I-23 as well as heat conduction in the nacelle made of material with anisotropic thermal conductivity. The one-dimensional (1D) model assumed that the nacelle with the air flow and engine was represented by a lumped thermal model in which heat was exchanged between the different lumped segments (the nodes) and the flowing air and engine. The three-dimensional (3D) model was based on the continuous control volume approach for heat, fluid flow and thermal radiation as well as on realizable k-ε turbulence model. Both models used commercial software.

Findings
The temperature distribution at the internal and external surface of the top nacelle was calculated. The 1D model predicted a temperature per node (per segment) while the 3D model was able to determine its values accurately and find the location of hot spots. Considering the complex geometry of the engine bay and nacelle and the assumed simplification, the obtained 1D and 3D results agreed quite well.

Practical implications
Both models will help in the development of new ventilation and cooling systems of the engine bay and nacelle as well as in the selection of materials for parts of the top cowling in the newly redesigned airplane I-23 equipped with a turboprop engine. In addition, the methodology presented in this paper might be applied in the development of other airplanes.

Originality/value
The 1D and 3D models of complex heat transfer inside the engine bay and in the nacelle of the newly re-designed airplane I-23 were elaborated and compared.
Thermoelastic flexural analysis of FG-CNT doubly curved shell panel
Authors: Mehar Kulmani , Panda Subrata Kumar 
Published: November 2017

Purpose
The purpose of this paper is to develop a general mathematical model for the evaluation of the theoretical flexural responses of the functionally graded carbon nanotube-reinforced composite doubly curved shell panel using higher-order shear deformation theory with thermal load. It is well-known that functionally graded materials are a multidimensional problem, and the present numerical model is also capable of solving the flexural behaviour of different shell panel made up of carbon nanotube-reinforced composite with adequate accuracy in the absence of experimentation.

Design/methodology/approach
In this current paper, the responses of the single-walled carbon nanotube-reinforced composite panel is computed numerically using the proposed generalised higher-order mathematical model through a homemade computer code developed in MATLAB. The desired flexural responses are computed numerically using the variational method.

Findings
The validity and the convergence behaviour of the present higher-order model indicate the necessity for the analysis of multidimensional structure under the combined loading condition. The effect of various design parameters on the flexural behaviour of functionally graded carbon nanotube doubly curved shell panel are examined to highlight the applicability of the presently proposed higher-order model under thermal environment.

Originality/value
In this paper, for the first time, the static behaviour of functionally graded carbon nanotube-reinforced composite doubly curved shell panel is analysed using higher-order shear deformation theory. The properties of carbon nanotube and the matrix material are considered to be temperature dependent. The present model is so general that it is capable of solving various geometries from single curve to doubly curved panel, including the flat panel.
A study of the relationships among environmental performance, environmental disclosure, and financial performance
Authors: Lu Lucy Wenxiang , Taylor Martin Edward 
Published: November 2017

PurposeThe purpose of this paper is to study the relationships among environmental performance (EP), environmental disclosure (ED), and financial performance (FP) (three corporate constructs) using data from Newsweek’s green rankings.Design/methodology/approachPrevious studies document mixed results about the relations among the three constructs. A firm’s overall management strategy may affect the three constructs simultaneously; therefore, the interrelationships among EP, ED, and FP were jointly examined. A simultaneous equations approach was used to test the hypothesis.FindingsThe three-stage least square (3SLS) estimation results show a negative relationship between EP and FP and a positive relationship between EP and ED, suggesting that financially successful firms are less likely good environmental performers but green firms are more likely to disclose their EP.Research limitations/implicationsSince the sample firms examined in this study are US large-size companies, the results found in this paper may not apply to small- and/or medium-size firms or to companies in other countries.Practical implicationsThree corporate constructs are jointly correlated with each one. A firm’s overall strategic plan on environmental engagement is likely reflected in how it engages in each of the constructs that affect costs and benefits. Sustainable efforts, in short term, may put firms at risk. Companies may need to take a long-term perspective when cutting costs is curtailed.Originality/valueThe research contributes to the ED and EP literature by using a 3SLS simultaneous equation method and analyzing a more recent and comprehensive multi-industry data. By controlling industry effect, the research investigates the interrelationships among three corporate constructs and finds interesting results. An interpretation and discussion are provided.
Why do firms appoint former military personnel as directors? Evidence of loan interest rate in militarily connected firms in Indonesia
Authors: Harymawan Iman 
Published: November 2017

Purpose
Anecdotal evidence shows that a number of military personnel have been appointed as board members by listed firms in Indonesia. Taking advantage of the unique setting of the strong influence of the military in Indonesian politics, the purpose of this paper is to provide direct empirical evidence on the effect of military connections on interest rate for listed firms in Indonesia.

Design/methodology/approach
This study uses a sample of 1,818 firm-year observations of firms listed on the Indonesian Stock Exchange (IDX) from 2004 to 2012 and employs Heckman’s two-stage regression and Coarsened Exact Matching methods to address endogeneity concerns on the firms’ establishment of military connections.

Findings
The finding reveals that connected firms significantly enjoy lower interest rates on debt than non-connected ones. These findings are robust to several robustness checks.

Research limitations/implications
The results of this study should be treated with caution since the proxy of military connections limited only based on board connections. Hence, this may underestimate the results from this study. This research has implications for Indonesia’s regulators who are striving to improve accounting information and transparency of militarily connected firms.

Originality/value
The results of this study add to the literature that connected firms enjoy preferential benefits provided by the connections through lower interest charges from banks.
The social impact investment race: toward an interpretative framework
Authors: Calderini Mario , Chiodo Veronica , Michelucci Fania Valeria 
Published: November 2017

Purpose
This paper aims to develop an interpretative framework of the evolution of social impact investment (SII) in different countries. SII is a strategy of asset allocation, which combines financial profitability with a measurable social and environmental impact.

Design/methodology/approach
Through a thematic analysis of 75 documents, i.e. reports, experts’ considerations, reflections on practitioners’ experience, meetings’ minutes, written by the SII Taskforce of the Group of Eight and the relative National Advisory Boards, the authors identify the main themes connected to the topic of SII development and recognize four main elements useful to segment the market, namely, information asymmetry, financial instruments, source of capital and market intermediation.

Findings
They map the ongoing practices in the Group of Eight’s members and distinguish two speeds in the evolution of SII: on one hand, there is a group of roadrunners, which pave the way to SII and in which SII activities have being institutionalized; on the other hand, there is a wider group of chasers, where the SII infrastructures lack any systematization.

Originality/value
Although some authors provide preliminary interpretations of the SII evolution, they mainly focus on the national level and do not provide any cross-countries analysis. The findings of the present work contribute to overcome the lack of evidence characterizing the SII field and the absence of comparable and consistent data at the global level by filling the academic literature about SII, through a structured interpretative framework.
Migrant women’s negotiation of belonging through therapeutic relationships
Authors: Lindqvist Mona , Wettergren Åsa 
Published: November 2017

PurposeThe purpose of this paper is to explore experiences and emotions of migrant women, who have been in psychotherapy in Sweden, their motives and experience of being treated in psychotherapy. The authors argue that not only traumas of the past but also social suffering in the post-migratory phase contribute to what brought them in contact with psychiatric care.Design/methodology/approachNarrative interviews with 12 migrant women, holding permanent residence permits, were conducted. The interviews were loosely structured around themes such as the experience of migration, of everyday living in Sweden, experiences of Swedish psychiatric care, and reflections and understandings of mental and physical health/ill health. Interview transcripts were analyzed thematically using abductive qualitative text analysis.FindingsIn the narratives an overarching motive for seeking out psychiatric help is the search for belonging and restoring a cohesive sense of self. Belonging is sought both in symbolic terms – formal access and right to health care – and in a deeper emotional sense as the therapist becomes a local adviser. The therapeutic encounter meets the human desire to be seen and confirmed as the person you are, and need to be, in the new host society. Meanwhile, psychotherapy as a way to negotiate belonging is also a risky endeavor, as the idealized view of the therapeutic relation may be disappointed.Research limitations/implicationsThis study provides the interviewed migrant women’s perception of the psychotherapeutic relationship. Yet this relationship needs to be elaborated from different perspectives to improve understanding of psychotherapy in psychiatric care.Originality/valueThe paper fills a gap in research concerning the dominance of the psychiatric discourse over subjective understandings of health and illness, and how this relates to emotions of social suffering in the case of migrant women.
Strong contracts: the relationship between power and action
Authors: Morgan Royston , Doran Des , Morgan Stephanie Jean 
Published: November 2017

Purpose
There is a view that strong preventative contracts are essential to control supplier opportunism and delivery during an outsourcing implementation. The purpose of this paper is to test the proposition that contractual project environments, typical of outsourcing engagements, are essentially conflictual and that context and circumstance can act to overwhelm formal contractual and project control and lead to poor outcomes.

Design/methodology/approach
The paper reports on a supply case study focussed on the outsourced delivery of an application development in the defence sector. Data were gathered by a participant observation in situ for a period of three years. A grounded analysis from observations, diaries, semi-structured interviews, focus groups, documentary analysis, and e-mails was carried out with six case organisations within the extended supply chain.

Findings
Collaboration between suppliers and buyers can be blocked by preventative fixed price contracts and as a result when requirements are incomplete or vague this adversely impacts success.

Practical implications
Strong contractual control focussed on compliance may actually impede the potential success of outsourcing contracts especially when collaborative approaches are needed to cope with variability in demand.

Originality/value
The research raises the important practical and conceptual notion that an outsourcing can be a conflictual inter-firm phenomenon especially where multiple actors are involved and business uncertainty is present.