bluuebunny/crossref_metadata_2025_split huggingface dataset:
Consumer adoption of virtual stores in Korea: Focusing on the role of trust and playfulness
Authors: Oh Sang Hyun , Kim Yong Man , Lee Chong Whan , Shim Gyu Yeol , Park Min Sook , Jung Hong Seob 
Published: June 2009

AbstractThe business‐to‐consumer aspect of electronic commerce (EC) is the most visible business use of the World Wide Web (WWW). A virtual store allows companies to provide product information and offer direct sales to their customers through an electronic channel. Success in this business is dependent on understanding the concerns of customers and identifying the factors that promote the intention to use a virtual store. Thus, this paper aims to examine the human motivations underlying individual behavioral intention to use a virtual store in Korea. This study employs TAM (technology acceptance model) as the base model and develops a more comprehensive version of TAM to better reflect a virtual store. The model employs playfulness, trust, information richness, and system quality, in addition to perceived usefulness and ease of use. The study investigates the causal relationships among the constructs used in this revised TAM and identifies the causal role of the constructs in developing the intention to use a virtual store. It finds that attitude toward a virtual store is the most significant factor in predicting the behavioral intention to use a virtual store. It also identifies perceived playfulness, perceived trust, perceived usefulness, and perceived ease of use as four major factors that directly affect virtual store users' attitudes. The results also indicate that information richness and system quality have significant albeit indirect impacts on consumer adoption of a virtual store. Considering the explosive growth of the virtual store market, a well‐established business strategy in a virtual store will deliver great success to the virtual store operators. © 2009 Wiley Periodicals, Inc.
Modeling consumer adoption of mobile shopping for fashion products in Korea
Authors: Ko Eunju , Kim Eun Young , Lee Eun Kyung 
Published: June 2009

AbstractThis study explores the potential of a consumer technology adoption model in examining structural relationships among mobile commerce characteristics, perceived value, and intention to adopt mobile shopping for fashion products. Through an online survey method, the 511 valid questionnaires obtained from Korean users of a mobile Internet service identified perceived m‐commerce characteristics consisting of four factors: usefulness, enjoyment, ease of use, and instant connectivity. The first three factors were positively related to perceived value, whereas instant connectivity was negatively related. Moreover, estimated structural equation modeling described the important function of perceived value as mediating the effect of m‐commerce characteristics on the consumers' intention to adopt mobile fashion shopping. Managerial implications for practitioners and researchers are discussed in the context of m‐commerce. © 2009 Wiley Periodicals, Inc.
Distortion engineering: vision or ready to application?
Authors: Zoch H.‐W. 
Published: June 2009

AbstractThe management of distortion remains to be one of the crucial factors in economic production of today. Nowadays common understanding is that the causes of distortion are spread over the entire manufacturing chain, each production step contributing to the final dimensional changes. The Collaborative Research Center “Distortion Engineering”, funded by the German Research Association (DFG) developed the methodology of Distortion Engineering. Starting from the distortion mechanisms, so‐called “carriers of distortion potential” allow describing the accumulation of dimensional changes along the process chain. Finally compensation potentials can be used to actively correct distortion characteristics and to minimize distortion.The presented paper, by taking into account economical criteria, will discuss the maturity of this concept. Opportunities to already introduce Distortion Engineering in actual production chains will be pointed out and future research work necessary will be addressed.
Distortion of conical formed bearing rings made of SAE 52100
Authors: Frerichs F. , Lübben Th. , Hoffmann F. , Zoch H.‐W. 
Published: June 2009

AbstractIn general, causes for distortion phenomena during heat treatment e.g. are in general inhomogeneities or asymmetries of the distributions of mass, alloying elements, microstructure and residual stresses. Recently published papers with cylindrical shaped bearing rings clearly pointed out the influence of residual stresses and their spatial distribution within a work piece on distortion [1]. In this contribution the influence of mass distribution will be investigated by means of conical bearing rings. The investigations of conical shaped bearing rings show in comparison to cylindrical shaped bearing rings an additional distortion even though the cooling is homogeneous over the whole surface of the work pieces. The asymmetric mass distribution leads in comparison to cylindrical rings to higher thermal stresses during the quenching process and therefore to a change of the conical angle of the work piece. The behavior of the conical bearings was investigated by means of cooling in gas nozzle fields and in a one chamber vacuum furnace with high pressure gas quenching. Additional to the investigations of different quenching processes, geometry variations were investigated. The experimental investigations of the considered processes were supplemented by computer simulation.
Quenching with fluid jets
Authors: Schuettenberg S. , Krause F. , Hunkel M. , Zoch H.‐W. , Fritsching U. 
Published: June 2009

AbstractThe quenching process within the heat treatment of workpieces can be optimized by applying locally adapted quenching conditions. Locally variable heat transfer conditions at the workpiece surface are realizable by impressing and regulation of adjustable flexible flow fields on the basis of arrays for jet flow impingings on surfaces inside the quenching media. With use of these adapted jet fields it is possible to generate spatially and or timewise varying quenching conditions with high cooling intensities for a systematic locally heat transfer during the quenching process.For the analysis of workpiece distortion activated by heat treatment, the heat transfer and hardening process by quenching in adapted flexible flow fields is modelwise described. By controlled quenching with liquid media, the quenching intensities can be increased for specific local hardening results on massive workpieces. By that, the heat treatment process and the quenching result can be affected and optimized by controlling the boiling process and the establishing of the rewetting front on the workpiece surface.
In‐process measurements of wall thickness deviations during turning
Authors: Stöbener D. , Goch G. 
Published: June 2009

AbstractDuring the turning process of a ring, the clamping force of the chuck causes circumferential deviations in the ring wall thickness and diameter. This paper focuses on an ultrasonic in‐process measuring system which is a prerequisite for in‐process compensation of the wall thickness deviation during turning using a fast tool servo. The presented system is coupled to the ring via a cooling lubricant jet and determines the phase difference between the echoes of an ultrasound burst, which are reflected from the outer and the inner ring surface. In order to ensure an accurate operation of the system in a turning centre, the influences of different operating conditions on the signal quality (amplitude height and variation, uncertainty of phase determination) were examined. The wall thickness measurement results of the ultrasonic system were compared with reference data from a coordinate measuring machine. As the observed differences between both methods are sufficiently small, the ultrasonic system is applicable to the in‐process compensation of wall thickness deviations in a turning process.
Distortion compensation strategies in the production process of bearing rings
Authors: Dijkman M. , Goch G. 
Published: June 2009

AbstractIn the SFB570, several sub‐processes of the standard process chain for manufacturing bearing rings have been modified in order to compensate distortion. This paper presents control strategies that enable a precise deployment of the compensation potential, on a local (sub‐process) level as well as along the process chain. Two different control strategies for local compensation are demonstrated at the example of the cutting and the gas quenching processes. Furthermore, a concept for a process‐wide compensation of distortion is presented.
Comparison of different approaches to transformation‐induced plasticity in steel
Authors: Wolff M. , Böhm M. , Suhr B. 
Published: June 2009

AbstractTransformation‐induced plasticity (TRIP) is an important phenomenon of material behaviour of steel. It may lead to distortion of work‐pieces. As there are open questions in modelling and simulation, TRIP is an important field of current research. There are different modelling approaches. The well‐known Leblond model is implemented in the commercial program SYSTUS (SYSWELD)®. New experiments and investigations show that there are interaction effects between TRIP and classical plasticity which cannot be described by the Leblond model. In this contribution, we compare the Leblond model with an alternative approach, discussing advantages and deficiencies. Moreover, we present some first comparative simulations in 3d settings.
Evaluation of models for martensitic transformation and TRIP via comparison of experiments and simulations
Authors: Suhr B. , Frerichs F. , Hüßler I. , Wolff M. 
Published: June 2009

AbstractThe main aim of the investigations is to compare and evaluate several models of martensitic transformation and transformation‐induced plasticity (TRIP) for the bearing steel 100Cr6, with and without taking stress dependence into account. At first, the investigations are based on measured data of tension‐compression tests with small probes undergoing martensitic transformation at a special testing machine. Secondly, we consider martensitic quenching of thin conical rings. In case of symmetric quenching by gas nozzles, the rings undergo distortion the major part of which can only be explained by TRIP, while the usual plasticity is negligible. The 3D‐simulations will be compared with experimental data.
Gastric myoelectrical differences between Parkinson's disease and multiple system atrophy
Authors: Sakakibara Yumi , Asahina Masato , Suzuki Atsuya , Hattori Takamichi 
Published: June 2009

AbstractThe electrogastrogram (EGG) was recorded for 24 hours in 17 Parkinson's disease (PD) patients, 17 multiple system atrophy (MSA) patients, and 8 healthy control subjects to elucidate the differences in the EGG findings between the two diseases. Eight EGG segments (3 preprandial, 3 postprandial, and 2 sleep segments) were selected from the total recording for spectral analysis, from which we obtained the dominant frequency (DF), instability coefficient of DF (ICDF), and low (LFR%), normal (NFR%), and high (HFR%) range power percentages of the total power. PD patients showed irregular slow waves, high HFR%, and high ICDF, whereas MSA patients showed regular slow waves and low ICDF. Although DF and NFR% increased after meal in controls, postprandial increases in DF and NFR% were less significant in both patient groups compared to the controls. The PD patients presented gastric dysrhythmias indicating gastric pacemaker disturbances. The MSA patients showed regular slow waves with low variability of the slow wave rhythm (low ICDF), which might have resulted from the involvement of gastric autonomic nerve function. © 2009 Movement Disorder Society
Substantia nigra echogenicity: A structural correlate of functional impairment of the dopaminergic striatal projection in Parkinson's disease
Authors: Weise David , Lorenz Reinhard , Schliesser Mira , Schirbel Andreas , Reiners Karlheinz , Classen Joseph 
Published: June 2009

AbstractTranscranial sonography (TCS) reveals abnormal spatial extension of substantia nigra (SN) echogenicity in a high proportion of patients with Parkinson's disease (PD). It has been proposed that this abnormality represents a structural trait that is mechanistically distinct from degeneration of dopaminergic nigrostriatal projection neurons. We sought to clarify the relationship between sonographic abnormalities of SN and dysfunction of striatal dopaminergic neurotransmission. We studied 50 patients with PD. The spatial extension of the echogenic SN area was compared with the activity of presynaptic striatal dopamine reuptake transporters, assessed in the same patients by I‐123‐2‐beta‐carbomethoxy‐3‐beta‐(4‐iodophenyl)‐tropane (β‐CIT) single‐photon emission computed tomography (SPECT). Extension of echogenic SN area correlated (inversely) with striatal activity of presynaptic dopamine reuptake transporter in PD patients (R = −0.417; P = 0.003) and with the equivalent levodopa dose (R = 0.380; P = 0.006; linear regression analysis). Findings support the hypothesis that in PD abnormal extension of echogenic SN area provides a direct structural marker of degeneration of SN neurons. Therefore, in PD, TCS and β‐CIT assess pathophysiologically related phenomena. © 2009 Movement Disorder Society
Effects of the level of feed intake and ergot contaminated concentrate on ergot alkaloid metabolism and carry over into milk
Authors: Schumann Barbara , Lebzien Peter , Ueberschär Karl‐Heinz , Dänicke Sven 
Published: June 2009

AbstractThe aim of the present study was to examine the effects of ergot contaminated concentrate at differing levels of feed intake on ergot alkaloid metabolism and carry over into milk. Twelve double fistulated (in the rumen and the proximal duodenum) Holstein Friesian cows were fed either the control diet (on a dry matter (DM) base: 60% maize silage, 40% concentrate) or the contaminated diet (concentrate contained 2.25% ergot, which caused an alkaloid concentration of the daily ration between 504.9 and 619.5 μg/kg DM) over a period of 4 weeks. Daily feed amounts were adjusted to the current performance which resulted in a dry matter intake (DMI) variation between 6.0 and 18.5 kg/day. The actual alkaloid exposure varied between 4.1 and 16.3 μg/kg body weight when the ergot contaminated concentrate was fed. Approximately 67% of the alkaloids fed were recovered in the duodenal ingesta, and ∼︁24% were excreted with the faeces. No alkaloid residues could be detected in the blood or milk samples.
Strategic dynamic sourcing from competing suppliers with transferable capacity investment
Authors: Li Cuihong , Debo Laurens G. 
Published: June 2009

AbstractWe study the supplier relationship choice for a buyer that invests in transferable capacity operated by a supplier. With a long‐term relationship, the buyer commits to source from a supplier over a long period of time. With a short‐term relationship, the buyer leaves open the option of switching to a new supplier in the future. The buyer has incomplete information about a supplies efficiency, and thus uses auctions to select suppliers and determine the contracts. In addition, the buyer faces uncertain demand for the product. A long‐term relationship may be beneficial for the buyer because it motivates more aggressive bidding at the beginning, resulting a lower initial price. A short‐term relationship may be advantageous because it allows switching, with capacity transfer at some cost, to a more efficient supplier in the future. We find that there exists a critical level of the switching cost above which a long‐term relationship is better for the buyer than a short‐term relationship. In addition, this critical switching cost decreases with demand uncertainty, implying a long‐term relationship is more favorable for a buyer facing volatile demand. Finally, we find that in a long‐term relationship, capacity can be either higher or lower than in a short‐term relationship. © 2009 Wiley Periodicals, Inc. Naval Research Logistics 2009
Bizygomatic breadth determination in damaged skulls
Authors: Oskam C. L. , Premachandra I. M. , Dias G. J. 
Published: June 2009

AbstractMetric and discriminant function analyses of the skull have been used successfully to determine ancestry and sex from human skeletal remains in both forensic and archaeological contexts. However, skulls are frequently discovered in damaged condition. One structure that is commonly fragmented, even when the rest of the skull is preserved, is the zygomatic arch. The bizygomatic width is an important measurement in craniometry and in forensic facial reconstruction for determining facial width; therefore we propose a simple linear regression model to predict the bizygomatic width of skulls with damaged zygomatic arches. Thirty‐one adult skulls originating from the Indian sub‐continent were used to measure the bizygomatic width. Then, on the same skulls, a straight steel wire was placed at the superior surface of the temporal and zygomatic origins of the zygomatic arch to simulate the zygomatic arch reconstruction on damaged skulls. These wire measurements were used to fit a simple linear regression model between the bizygomatic widths and the wire measurements, and the estimated regression model; Bizygomatic Width (bone) = 0.61 + 1.02(wire measurement), has a very high R2 value of 0.91. Hence, this model could effectively be used to predict bizygomatic widths based on wire measurements. In addition, the bizygomatic widths and wire measurements were collected from 14 New Zealand European skulls to test the ability of the regression model to determine bizygomatic widths from different ethnic groups. This model accurately predicted the bizygomatic widths in New Zealands of European origin skulls and therefore suggests that this regression model could be used for other ethnic groups. The importance of the bizygomatic width for craniometric analysis makes this regression model particularly useful for analysing archaeological samples. Furthermore, this regression line can be used in the field of forensic facial reconstruction to reconstruct damaged zygomatic arches prior to facial reconstructions. Copyright © 2009 John Wiley & Sons, Ltd.
Cancer Research UK's Cancer Campaigns function: moving into the campaigning arena
Authors: Spiers Jon 
Published: June 2009

Abstract

This paper explores the evolution of patient and public involvement in campaigning at Cancer Research UK.

Cancer Research UK is the world's leading charity dedicated to cancer research. They support research into all aspects of cancer through the work of more than 4500 scientists, doctors and nurses in over 40 towns and cities in the UK. They produce information for audiences including cancer patients and their families, the general public and health professionals. They also work with government in Westminster, Scotland, Wales and Europe to ensure cancer is at the top of the political agenda.

In 4 years, the charity grew its campaigner base from zero to well over a third of a million people. This case study covers the research exercise in 2004, the 2005 launch of the pilot and growth of the nascent campaigning function, the major campaigns up to 2008 and what lessons were learnt from them.

The aim of this case study is to examine how the process occurred, share insights into the challenges and opportunities, and make recommendations for any organization considering a similar move.

Copyright © 2009 John Wiley & Sons, Ltd.
Marriage: Cause or mere indicator of future earnings growth?
Authors: Mincy Ronald , Hill Jennifer , Sinkewicz Marilyn 
Published: June 2009

AbstractThe hypothesis that marriage increases men's earnings has contributed to legislative support for the Healthy Marriage Initiative (HMI). However, previous studies of this phenomenon have not controlled for many relevant characteristics that select men into marriage, nor have they focused on low‐income, unmarried fathers—the population targeted by HMI. We use the Fragile Families and Child Wellbeing Study, which measures many previously unobserved confounders, to test for a relationship between marriage and earnings. We use a variety of analytic strategies to control for selection (including differencing and propensity scores) and find no evidence of an effect of transitions to marriage on the earnings of unmarried fathers that differs from zero, either for the full sample or subsamples defined by race‐ethnic category and baseline cohabitation status. © 2009 by the Association for Public Policy Analysis and Management.
Crystal distribution and molecule orientation of micro injection molded polypropylene microstructured parts
Authors: Lu Zhen , Zhang K.F. 
Published: June 2009

AbstractPolypropylene (PP) microstructured part which comprises micro columns array and a macroscopical base plate was manufactured by micro injection molding. The morphology distribution in micro columns is quite different from that of the base plate. This article investigates the crystal distribution and molecule orientation of the microstructured part by X‐ray diffraction. The hardness of shear zone of micro columns was evaluated by Nano Indenter. Test results show that both micro columns and macroscopical base plate contain α and β phase. However, the relative proportion of β phase in micro columns is markedly higher than that of the base plate. β phase distributes only in the shear zone of the microstructured part. So, the mechanical properties of micro columns must differ from that of the base plate. In addition, the orientation of Ø100 μm micro columns is slight, which indicates that the mechanical anisotropy of micro columns induced by orientation could be ignored. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers
Further validation of the Systematic Screening for Behavior Disorders in middle and junior high school
Authors: Richardson Michael J. , Caldarella Paul , Young Benjamin J. , Young Ellie L. , Young K. Richard 
Published: June 2009

AbstractThe Systematic Screening for Behavior Disorders (SSBD), a screening system to identify elementary students at risk for emotional and behavioral disorders, was evaluated for use in middle and junior high schools. Teachers completed SSBD Stages One and Two on students in grades 6 to 8 who had characteristics of internalizing or externalizing disorders. Teacher, parent, and self‐rating forms of the Achenbach System of Empirically Based Assessment (ASEBA) and the Social Skills Rating System (SSRS) were also completed on 66 students nominated via the SSBD as at risk for internalizing and externalizing problems. Office discipline referrals and grade point averages, for students nominated at SSBD Stage One, were compared with nonnominated students resulting in medium to large effect sizes. Small to moderate correlations were also found between SSBD Stage Two scores and ASEBA and SSRS scores, including several from the parent and student forms. © 2009 Wiley Periodicals, Inc.
A developmental continuum of phonological sensitivity skills
Authors: Pufpaff Lisa A. 
Published: June 2009

AbstractA large body of evidence supports the link between acquisition of phonological sensitivity skills among young children and their later literacy achievement. This literature review presents a synthesis of the developmental nature of phonological sensitivity skills as assessed among typically developing children over the past 30 years. Phonological sensitivity is composed of both phonological awareness and phonemic awareness, each representing a distinct set of skills that emerge in a general developmental sequence among typically developing children. Yet, insufficient attention is being paid to the developmental nature of phonological sensitivity skills in our efforts to identify and remediate early literacy difficulties among children. This article presents the array of skills that constitute phonological sensitivity, ordered in a developmental continuum based on research evidence in order to create a bridge between scientific evidence and school‐based practices. © 2009 Wiley Periodicals, Inc.