bluuebunny/crossref_metadata_2025_split huggingface dataset:
The relationships of work–family conflict and core self‐evaluations with informal learning in a managerial context
Authors: Tews Michael J. , Noe Raymond A. , Scheurer Andrew J. , Michel John W. 
Published: February 2015

Existing research on informal learning has been largely descriptive, anecdotal, and relatively limited regarding its antecedents. This study represents a step forward towards addressing this gap in the training and development literature by examining the relationships of work–family conflict and core self‐evaluations with informal learning among managers. The sample included 225 managers companywide from a casual‐theme restaurant chain in the United States. The results demonstrated that time‐based work interference with family conflict (WIF) had a negative relationship with informal learning, but core self‐evaluations had a positive relationship. Further, core self‐evaluations moderated the WIF–informal learning relationship. Counter to the hypothesized relationship, managers higher in core self‐evaluations engaged in less informal learning as work–family conflict increased. This study broadens the nomological network of informal learning and highlights that organizations need to limit time demands at work that cause work–family conflict to facilitate managers’ informal learning.Practitioner points

Limit work–family conflict so managers have the time to invest in informal learning in addition to their family and own recovery.

Provide managers with skills in time management and goal setting and provide support necessary to encourage informal learning.
Pharmacokinetics and distribution of voriconazole in body fluids of dogs after repeated oral dosing
Authors: Lemetayer J. D. , Dowling P. M. , Taylor S. M. , Papich M. G. 
Published: February 2015

The goal of this project was to determine the pharmacokinetics of voriconazole and its concentration in cerebrospinal fluid (CSF), aqueous humor, and synovial fluid in five healthy dogs following once daily oral dose of 6 mg⁄kg for 2 weeks. Body fluid and plasma drug concentrations were determined by high‐performance liquid chromatography (HPLC). Mild to moderate gastrointestinal adverse effects were seen. The mean AUC0–24: minimum inhibitory concentration (MIC) ratio was 15.23 for a chosen MIC of 1 μg/mL, which is lower than the recommended target of 20–25 and also lower than previously reported in dogs, perhaps reflecting induction of metabolizing enzymes by multiple dosing. Voriconazole concentrations in the CSF, aqueous humor, and synovial fluid were only 13–30% the concurrent plasma concentration, which is lower than previously reported in other species. Results of this study suggest that twice daily, administration may be necessary to maintain therapeutic plasma concentrations in dogs but further studies are warranted.
Japanese amyotrophic lateral sclerosis patient with learning disabilities with a deletion mutation in the C‐terminal of the FUS/TLS gene
Authors: Onohara Akiko , Koh Kishin , Nagasaka Takamura , Shindo Kazumasa , Kato Masaaki , Aoki Masashi , Takiyama Yoshihisa 
Published: February 2015

AbstractWe report a 19‐year‐old Japanese man with a heterozygous deletion mutation (c.1485delA, p.G497AfsX527) in the fused in sarcoma/translated in liposarcoma gene. His mother and aunt were diagnosed with amyotrophic lateral sclerosis. He and his mother had learning disabilities. He noted muscle weakness of the right arm at age 18 years and 9 months. His respiratory function worsened rapidly, and he died of respiratory failure 11 months after onset. To date, the fused in sarcoma/translated in liposarcoma c.1485delA mutation has only been reported in three patients in a Caucasian family, and all those patients had a short disease course (12–18 months) and learning disabilities or slowness in school, similar to our patients. Thus, the fused in sarcoma/translated in liposarcoma c.1485delA mutation might cause a rapid disease course and affect the learning function. This is the first non‐Caucasian patient with a heterozygous mutation, c.1485delA, in the fused in sarcoma/translated in liposarcoma gene.
Portal flow modulation in auxiliary partial orthotopic liver transplantation
Authors: Rela Mohamed , Bharathan Anand , Palaniappan Kumar , Cherian Pradeep T. , Reddy Mettu S. 
Published: February 2015

AbstractAPOLT is a suitable technique of liver transplantation in patients with ALF and some types of MLD. Portal venous steal is a problem with this procedure that leads to graft dysfunction and failure. Modulation of the portal flow to the graft and native liver can help in preventing this problem. We discuss the pathophysiology of this complication, review available literature regarding its management, and describe our results using the technique of graded hemiportal banding to achieve adequate perfusion for the graft and native liver.
Attachment style impacts behavior and early oculomotor response to positive, but not negative, pictures
Authors: Silva Catarina , Chaminade Thierry , David Da Fonseca , Santos Andreia , Esteves Francisco , Soares Isabel , Deruelle Christine 
Published: February 2015

The present study investigated whether oculomotor behavior is influenced by attachment styles. The Relationship Scales Questionnaire was used to assess attachment styles of forty‐eight voluntary university students and to classify them into attachment groups (secure, preoccupied, fearful, and dismissing). Eye‐tracking was recorded while participants engaged in a 3‐seconds free visual exploration of stimuli presenting either a positive or a negative picture together with a neutral picture, all depicting social interactions. The task consisted in identifying whether the two pictures depicted the same emotion. Results showed that the processing of negative pictures was impermeable to attachment style, while the processing of positive pictures was significantly influenced by individual differences in insecure attachment. The groups highly avoidant regarding to attachment (dismissing and fearful) showed reduced accuracy, suggesting a higher threshold for recognizing positive emotions compared to the secure group. The groups with higher attachment anxiety (preoccupied and fearful) showed differences in automatic capture of attention, in particular an increased delay preceding the first fixation to a picture of positive emotional valence. Despite lenient statistical thresholds induced by the limited sample size of some groups (p < 0.05 uncorrected for multiple comparisons), the current findings suggest that the processing of positive emotions is affected by attachment styles. These results are discussed within a broader evolutionary framework.
An Experimental Investigation of Stator Induced Unsteadiness on Centrifugal Impeller Outflow
Authors: Ubaldi Marina , Zunino Pietro , Barigozzi Glovanna , Cattanel Andrea 
Published: February 2015

Detailed flow measurements were taken in a centrifugal turbomachine model to investigate the aerodynamic influence of the vaned diffuser on the impeller flow.
The model consists of an unshrouded centrifugal impeller with backswept blades and a rotatable vaned diffuser which enables a continuous variation of the vaned diffuser location with respect to the measuring points.
Phase locked ensemble averaged velocity components have been measured with hot wire probes at the impeller outlet for 30 different relative positions of the probe with respect to the diffuser vanes. The data also include the distribution of the ensemble averaged static pressure at the impeller front end, taken by means of miniature fast response pressure transducers flush mounted at the impeller stationary casing. By circumferentially averaging the results obtained for the different circumferential probe locations, the periodically perturbed impeller flow has been split into a relative steady flow and a stator generated unsteadiness.
The results for the different probe positions have also been correlated in time to obtain instantaneous flow field images in the relative frame, which provide information on the various aspects of the diffuser vane upstream influence on the relative flow leaving the impeller.
Computations of a Film Cooled Turbine Rotor Blade With Non-Uniform Inlet Temperature Distribution Using a Three-Dimensional Viscous Procedure
Authors: Weigand B. , Harasgama S. P. 
Published: February 2015

A numerical investigation of film cooling on a turbine rotor blade has been carried out. The computations were performed with a 3D-Navier-Stokes code utilizing an unstructured solution adaptive grid methodology (Dawes (1992)). The code uses a low Reynolds number k-epsilon model for prescribing the Reynolds stresses. The results show that there is a significant interaction between the coolant flow and the secondary flow near the hub and the tip of the turbine blade. It was observed that, by blowing on the pressure side of the blade, some of the cooling air was transported through the tip gap of the blade to the suction side of the blade where the coolant flow interacts with the secondary flow field.
When radial inlet temperature distortion (RTD) is included, it was possible to show that there were some further modifications of the film cooling effectiveness on the rotating blade near the pressure side tip. This is believed to be mostly because of the changed secondary flow system due to the radial inlet temperature profile.
Development of 300 kW Class Ceramic Gas Turbine (CGT302)
Authors: Watanabe Aklo , Tatsumi Tetsuo , Tanimura Kazuhiko , Takehara Isashi , Fujii Tatsuo 
Published: February 2015

The Japanese Ministry of International Trade and Industry (MITI) is promoting the Ceramic Gas Turbine (CGT) project for energy saving technology development under the ‘New Sunshine project’. The objective of this project is to develop a 300 kW ceramic gas turbine with 42% thermal efficiency at 1350°C turbine inlet temperature.
Three types of CGT are under development for individual purposes and concepts. CGT302 is the recuperated two-shaft ceramic gas turbine for cogeneration use.
Ceramic materials have many advantages in the application of high temperature gas turbines, but there are still several problems of practical use. Therefore, we introduce the unique technology of monolithic - FRC hybrid concept to fabricate large ceramic components, stress free supporting structure, joining technology, etc. The all ceramic components of the 1200°C CGT were successfully fabricated and engine tests are in progress.
This paper will describe the technologies of the CGT302 development and results of engine tests.
On Fast-Response Probes: Part 1 — Technology, Calibration and Application to Turbomachinery
Authors: Gossweiler Christoph R. , Kupferschmied Peter , Gyarmathy George 
Published: February 2015

A system for fast-response probe measurements in turbomachine flows has been developed and tested. The system has been designed for 40 kHz bandwidth and used with various in-house built probes accommodating up to 4 piezoresistive pressure transducers. The present generation of probes works accurately up to several bar pressure and 120°C temperature. The probes were found to be quite robust.
The use of miniature pressure transducers placed in the head of probes showed that a precise packaging technique and a careful compensation of errors can considerably improve the accuracy of the pressure measurement.
Methods for aerodynamic probe calibration and off-line data evaluation are briefly presented. These aimed, i.e. in the case of a 4-hole probe, at measuring the velocity fluctuations as characterised by yaw, pitch, total pressure and static pressure and at deriving mean values and spectral or turbulence parameters.
Applications of the measuring system to turbomachinery flow in a radial compressor and to a turbulent pipe flow demonstrate the performance of the measuring system.
A Blade by Blade Tip Clearance Measurement System for Gas Turbine Applications
Authors: Sheard A. G. , Killeen B. 
Published: February 2015

It is difficult to make a reliable measurement of running clearance in the hostile environment over the blading of a modern gas turbine. When engine manufacturers require the measurement to be made over every blade during live engine tests, system reliability, ruggedness and ease of operation are of primary importance.
This paper describes a tip clearance measurement system that can measure clearance over every blade around a rotor. The measurement system concept is presented, and the system design described in detail. Commissioning of the measurement system on a compressor test facility, and the results obtained are discussed. An analysis of system performance during the commissioning trials concludes the paper.
Advanced Digital 200 Chanels Dynamic Cassette Recording System for Development Engine Test Cell
Authors: Eyraud J. , Auzolle F. 
Published: February 2015

The development of a new aircraft engine leads to equip development engine with a large number of dynamic transducers.
The huge flow of data generated in this type of test cannot be handled anymore practically through the conventional analog recording systems.
Recent emergence on the market of standardized multivendor ANSI ID1 high capacity, high speed digital recorders has allowed the development of a fully digital recording system at a competitive price. Such a system is able to complete in one sequence a full dynamic test measurement on a development engine through a 200 channels capacity.
A test cell is now being equipped and the expected benefits in terms of accuracy, productivity, lower cost and reduced volume of tape, have been achieved.
Standardized tapes permit data exchange between partners on an engine program.
Higher integration with data post-processing has also been obtained and transmission of data through fiber optic link is now made possible.
Hybrid Ceramic Bearing Development for Gas Turbine Engines
Authors: Slaney Frederick D. 
Published: February 2015

Over the past seven years, an extensive hybrid bearing development program has been conducted at Textron Lycoming. This paper will report the details of testing and the extraordinary results which can be obtained with silicon nitride balls as applied in hybrid bearings on gas turbine engines. This paper describes the analytically predicted advantages which low mass silicon nitride balls offer at speeds over 2.0MDN. Rig testing comparing hybrid bearings to standard bearings is reported. Testing included heat generation evaluation which showed that hybrid bearings generate an average of 40% less heat than standard bearings.
Rig simulation of the AGT1500 mission duty cycle demonstrated that the hybrid silicon nitride bearing system is robust enough to handle the most severe operating conditions. Testing under severe slipping/skidding conditions demonstrated good resistance to skid failure. Under conditions selected to produce high wear, no wear was induced in a hybrid bearing while severe wear was induced in the M50 steel bearing. These preliminary successes lead to active engine testing on the AGT1500 and a new test program to demonstrate operation at 4.0 MDN.
As a result of these programs Textron Lycoming now considers hybrid ceramic bearings as a viable design to be used in high speed development applications. This paper provides design detail and test data covering the work outlined above.
The Development of Cost Effective Gas Turbine Installations Offshore
Authors: Hancock William P. 
Published: February 2015

The paper describes the application and development of the offshore gas turbine from its infancy on Lake Maracaibo, Venezuela up to the current mature technology. North Sea developments are described, particularly in the Norwegian sector which was an important contributor to advancing the state of the art.
The first application of the second generation aero engine and of the very high pressure centrifugal gas compressor were important milestones which have made significant contributions to the economic recovery of North Sea hydrocarbons.
The author describes the current efforts to further optimise gas turbine installation, and operating costs. Cheaper and lighter gas turbine facilities require, not only increases in specific power, but also considerable innovation from the Engineers responsible for the application of this machinery.
For the future, fewer units of even larger ratings are foreseen, applied as high efficiency simple cycles with limited heat recovery.
Uncoupling of Vibration Modes Applied to Rotor Balancing
Authors: Delgado Eduardo Preciado , Romano Jorge Enrique Aguirre 
Published: February 2015

It is argued in this paper that errors in rotor balancing practice are often due to the difference between the angular location of vibration transducers and that of the vibration modes of the rotor.
A methodology is presented for uncoupling of the vibration modes of an unbalanced rotor. This leads to the theoretical elimination of the errors in determining the phase angle of the resonant response of the rotor and hence in the angular location of the balancing weights.
Differences between theory and reality are here briefly discussed although field application methodologies and experiences will be the subject of another paper.
Performance of Worn Labyrinth Seals
Authors: Zimmerman H. , Kammerer A. , Wolff K. H. 
Published: February 2015

The major sealing device between rotating and static aeroengine parts is still of labyrinth type. Nowadays the fins and the stator may be coated and the running conditions very often cause heavy rubs which leads to severe surface imperfections.
This paper investigates the influence of rounded fins and worn coatings on the discharge coefficients of straight through labyrinth seals. The relevant effects of Reynolds number are investigated.
Some measured fin and coating surfaces from engine parts are presented. Experimental and numerical results show a strong effect of wear on labyrinth seal performance.
Inverse Design of Centrifugal Compressor Vaned Diffusers in Inlet Shear Flows
Authors: Zangeneh M. 
Published: February 2015

A 3D inverse design method in which the blade (or vane) geometry is designed for specified distributions of circulation and blade thickness is applied to the design of centrifugal compressor vaned diffusers. Two generic diffusers are designed, one with uniform inlet flow (equivalent to a conventional design) and the other with a sheared inlet flow. The inlet shear flow effects are modelled in the design method by using the so-called “Secondary Flow Approximation” in which the Bernoulli surfaces are convected by the tangentially mean inviscid flow field. The difference between the vane geometry of the uniform inlet flow and non-uniform inlet flow diffusers is found to be most significant from 50% chord to the trailing edge region.
The flow through both diffusers are computed by using Denton’s 3D inviscid Euler solver and Dawes’ 3D Navier-Stokes solver under sheared inflow conditions. The predictions indicate improved pressure recovery and internal flow field for the diffuser designed for shear inlet flow conditions.
The Coefficient of Discharge of 30° Inclined Film Cooling Holes With Rounded Entries or Exits
Authors: Hay N. , Lampard D. , Khaldi A. 
Published: February 2015

The coefficients of discharge of 30° inclined holes having a length to diameter ratio of 6, and rounded entries or exits have been measured for a range of crossflow conditions. The rounding radius varied from 0 to 1 hole diameters, and the crossflow Mach numbers from 0 to 0.5.
Rounding the hole inlet was found to be beneficial, with increases of up to 15% being obtained at high coolant (inlet) side crossflow Mach numbers. Rounding the exit produced no significant benefit.
The crossflow effects have been correlated using inlet and outlet additive loss coefficients. These reflect the changes in pressure drop across the hole necessary to maintain the hole mass flow rate when crossflows are applied.
The correlated data have been incorporated in a computer program which gives good predictions of discharge coefficient in the presence of either a coolant crossflow or a mainstream crossflow or both.
Cruise Gas Turbine Experience in the British and Netherlands Navies
Authors: Tasker R. J. , Schipholt M. G. Lutje 
Published: February 2015

The views and opinions expressed in this paper are not necessarily endorsed by the Ministry of Defense.
The Royal Navy (RN) and the Royal Netherlands Navy (RNLN) use the Rolls Royce Tyne RN 1C Gas Turbine as their cruise propulsion engine, achieving some 150,000 running hours per year. Each installed Tyne engine achieves approximately 1800 running hours per year with a large proportion at high powers. This paper describes the experience of usage, the maintenance and technical control of these engines in recent years. and gives examples of actions taken and the results achieved.
The conclusions give an assessment of the general performance of the RN/RNLN team and the likely way ahead.
Development of 12CR Steel Disc for Heavy Duty Gas Turbines
Authors: Hidaka K. , Shiga M. , Nakamura S. , Fukui Y. 
Published: February 2015

This paper describes research and development of 12Cr steel for heavy duty gas trubine disc. The 1300°C class gas turbine developed by Hitachi, Ltd. (H25) is commercially operated for land-based power generator (25MVA) which is realized after five years designing.
The quantitative study of alloying elements, which increase mechanical properties such as creep rupture strength, tensile strength, and toughness, is discussed. The sixteen pieces of real scale disc for 1300°C class gas turbine are examined to evaluate mechanical properties in terms of real operation. The recent study of 12Cr steel disc for 1500°C class gas turbine is also discussed.
A Study on Low NOx Combustion in LBG-Fueled 1500°C-Class Gas Turbine
Authors: Nakata Toshihiko , Sato Mikio , Ninomiya Toru , Hasegawa Takeharu 
Published: February 2015

Developing integrated coal gasification combined cycle systems ensures cost-effective and environmentally sound options for supplying future power generation needs. The reduction of NOx emissions and increasing the inlet temperature of gas turbines are the most significant issues in gas turbine development in an Integrated Coal Gasification Combined Cycle (IGCC) power generation systems. The coal gasified fuel, which is produced in a coal gasifier of air-blown entrained-flow type has calorific value as low as 1/10 of natural gas. Furthermore the fuel gas contains ammonia when a gas cleaning system is a hot type, and ammonia will be converted to nitrogen oxides in the combustion process of a gas turbine.
This study is performed in a 1500°C-class gas turbine combustor firing low-Btu coal-gasified fuel in IGCC systems. An advanced rich-lean combustor of 150-MW class gas turbine was designed to hold stable combustion burning low-Btu gas and to reduce fuel NOx emission that is produced from the ammonia in the fuel. The main fuel and the combustion air is supplied into fuel-rich combustion chamber with strong swirl flow and make fuel-rich flame to decompose ammonia into intermediate reactants such as NHi and HCN. The secondary air is mixed with primary combustion gas dilatorily to suppress the oxidization of ammonia reactants in fuel-lean combustion chamber and to promote a reducing process to nitrogen.
By testing it under atmospheric pressure conditions, the authors have obtained a very significant result through investigating the effect of combustor exit gas temperature on combustion characteristics. Since we have ascertained the excellent performance of the tested combustor through our extensive investigation, we wish to report on the results.