bluuebunny/crossref_metadata_2025_split huggingface dataset:
The relationship between technology acceptance and frequency of mobile commerce use amongst Generation Y consumers
Authors: Dlodlo Nobukhosi , Mafini Chengedzai 
Published: May 2013

Orientation: The South African mobile commerce industry has realised an exponential growth in the past few years, yet the Generation Y market segment has failed to keep pace with this growth.Research purpose: To examine the nature of the relationships that exist between technology acceptance and frequency of mobile commerce usage amongst Generation Y consumers.Motivation for the study: The Generation Y cohort has emerged as an important age-group due to its economic contribution to the economy. It is therefore essential that their attitudes and behaviour continue to receive empirical introspection, particularly since mobile commerce has gathered momentum as an important and arguably, the most popular medium for commercial transactions. In a global space that is technology based, it becomes imperative to investigate the interplay between mobile commerce acceptance dimensions and frequency of use amongst Generation Ys.Research design, approach and method: A survey was conducted with the aid of a structured self-administered questionnaire with a view to collecting primary data from a sample consisting of 204 Generation Y consumers.Main findings: There were positive correlations between frequency of use and five mobile commerce acceptance dimensions. Cronbach Alpha values ranged between 0.714 and 0.898, thereby indicating high internal consistency amongst the subscales as well as within the entire survey instrument. Correlation coefficients ranged between 0.164 and 0.677 at both the p < 0.01 and p < 0.05 significance levels (2-tailed test), indicating very high levels of association amongst the subscales. Predictive validity of the five subscales and the variable frequency of use resulted in positive and statistically-significant results that were established at an adjusted R2 value of 0.674.Practical/managerial implications: Marketers and business practitioners are presented with practical insights into dimensions that enhance frequency of use of mobile commerce technology amongst Generation Y consumers. Furthermore, an increased usage of mobile commerce technologies is projected to have a stimulus effect on profitability, sustainability and loyalty of this important market segment.Contribution/value-add: Frequency of use is a good predictor of Generation Y consumers’ acceptance of mobile commerce as justified by the positive and statistically significant results of this study.
Effects of Staff Turnover on the Employee Performance of Work at Masinde Muliro University of Science and Technology
Authors: Butali Namasaka David , Wesang’ula Poipoi Moses , Mamuli Laura Catherine 
Published: May 2013

High staff turnover affects the smooth running of institutions. This study established the effect of staff turnover on performance of work in Masinde Muliro University of Science and Technology (MMUST). Specific objectives of the study were: to identify effects of staff turnover on administrative work and to identify financial/economic effects of staff turnover. A conceptual framework formed the basis of this study. Correlational research design was used in this study. Cluster random sampling procedure was used to collect data. Questionnaires, interviews, document analysis and observation were blended to capture authentic and exhaustive data. A randomly selected sample of 25 departments was used in this study. A total of 152 respondents participated. Data were analyzed using inferential and descriptive statistics.. The study established that economically, staff turnover in increases work for the remaining staff, leads to customer dissatisfaction, brings about decreased income due to reduced productivity, and leads to increased liability to the practice. Socially, staff turnover lowers staff morale and creates gaps in the social groupings. The study recommends that MMUST should improve on mechanisms of getting feedback from its staff members regarding problems that are likely to cause staff turnover. In addition, staff taking over duties performed by those exiting be given proper orientation.Key Words; Non teaching departments, Non teaching staff, Performance of Work, Retention rate, Staff turnover and Teaching departments.
Results of Cataract Surgery with Z-flex Hydrophilic Acrylic Toric IOL
Authors: Einan-Lifshitz Adi , Barkana Yaniv , Goldich Yakov , Gutfreund Shay , Avni Isaac , Zadok David 
Published: May 2013

Purpose To report the outcome of cataract surgery with implantation of the Z-flex 690TA hydrophilic acrylic toric intraocular lens (IOL). Methods We enrolled consecutive patients who had 1.75 D or more of preexisting corneal astigmatism. Patients had cataract extraction surgery with implantation of a Z-flex 690TA toric IOL (Medicontur, Hungary). Refractive outcomes, keratometry, correction ratio (CR), and error of magnitude (EM) were evaluated. Results Nineteen eyes of 13 patients were evaluated. Mean follow-up time was 4.3 ± 2.3 months. Mean preoperative keratometric astigmatism was 3.05 ± 0.74 D. Mean postoperative deviation from the anticipated spherical equivalent was +0.23 ± 0.39 D, with 100% of eyes achieving a spherical equivalent within ± 1.00 D of the target refraction. Mean deviation from the anticipated refractive cylinder was 0.46 ± 0.47 D. Mean IOL misalignment was 5.67 ± 6.45 degrees. Mean CR was 1.02 ± 0.22, and the mean EM was −0.09 ± 0.55 D. Conclusion The Z-flex 690TA hydrophilic acrylic toric IOL implantation was safe, effective, and predictable in correcting corneal astigmatism during cataract surgery.
Therapeutic Strategies in Penile Cancer: State of the Art
Authors: Gulino Gaetano , Palermo Giuseppe , Recupero Salvatore Marco , Antonucci Michele , Racioppi Marco , Pinto Francesco , Sacco Emilio , Bassi Pier Francesco 
Published: May 2013

A systematic review of the current treatment options and of the outcomes of penile carcinoma has been performed with special focus on controversial issues. A MedLine search using specified search terms was done during the period 1988 - January 2013. Demolitive surgery is considered as the “gold standard” treatment of invasive penile carcinoma staged higher than T2, but negative psychological outcomes were reported. On the other hand, conservative surgical techniques have been associated with higher recurrence rates. Potency-sparing technique (glansectomy and apexes sparing) preserves penile length: the reconstruction of glans anatomy and function is a key point to restore anatomy and sexual functions. Techniques such as glanduloplasty have given satisfactory anatomic, functional and sexual outcomes. Lymphadenectomy is indicated in any case of inguinal palpable nodes that persist after a course of antibiotic therapy, but also in all the cases staged T2 or higher, or in any high-grade penile cancer. It is still being debated the extension of inguinal lymphadenectomy for penile cancer: unilateral, bilateral, and extended to pelvic lymph nodes. Due to the specific radioresistance of penile cancer, radiation therapy is currently indicated in case of unresectable penile cancers with palliative intent. Chemotherapy is indicated as adjuvant therapy for stage T1-T3, N1-3, M0, or as neo-adjuvant therapy in the event of extensive pelvic and inguinal lymphadenopathies, or as palliative treatment in patients with unresectable or metastatic cancers. New chemotherapy agents such as Cis - platinum and Taxanes have shown promising results in early trials.
Expressive Bodies / Controlling Impulses The Dance Between Official Culture and Musical Resistance in Colonial Western Tanganyika
Authors: Gunderson Frank 
Published: May 2013

Abstract
This article will demonstrate, via a series of seven music-related vignettes gathered from archival research and oral history, aspects of the historical relationship between resistance expressed via “musicking,” and “official culture” expressed via the use of force, spectacle, policy, and the rule of law. The relationship between power and musical resistance is treated as a dance: one partner in this dance is the “controlling mechanism” inherent and always implied in the expression of power and the entire spectrum of behavior that power encompasses. The other partner is the spectrum of resistive musical responses that includes everything from blatant protest via public performative “spectacle,” “hidden resistance,” accommodative resistance, and subtle and blatant complicity. The majority of the historical vignettes come from the Sukuma region of western Tanzania, taking place during the German and British colonial periods (from the late 1900s up to the early 1960s).
James Baldwin, Simone de Beauvoir, and the “New Vocabulary” of Existentialist Ethics
Authors: Farneth Frank 
Published: May 2013

Abstract
James Baldwin wrote that his essay “Everybody's Protest Novel” marked “a beginning of my finding a new vocabulary and another point of view.” This article explores the striking similarities between the new ethical vocabulary in Baldwin's early Paris essays and that of Simone de Beauvoir's emerging existentialist ethics, particularly in their use of a coming-of-age metaphor to talk in moral terms about innocence, guilt, and responsibility. Reading these two authors together illuminates both Beauvoir's unique characterization of existentialism and its influence on Baldwin's mature thought.
Synopsis of the Woody Species of Smilax in the Eastern United States North of Peninsular Florida
Authors: Bullard A. J. , Allen Charles M. 
Published: May 2013

Abstract
The nine woody species of Smilax (S. auriculata, S. bona-nox, S. glauca, S. laurifolia, S. pumila, S. rotundifolia, S. smallii, S. tamnoides, and S. walteri) of the eastern United States north of peninsular Florida are described through the use of charts. The habitat, range, common names, and synonyms for each are listed. A key to the nine species is provided.
Four Crayfishes (Decapoda: Cambaridae) New to the North Carolina Fauna, With Notes on Other Species in the State
Authors: Cooper John E. , Russ William T. 
Published: May 2013

Abstract
Cambarus (Puncticambarus) aldermanorum, originally considered endemic to South Carolina, is now known from the upper Catawba River basin in Burke and Caldwell counties, North Carolina. Orconectes (Crockerinus) erichsonianus and Orconectes (Procericambarus) forceps, both previously known from Alabama, Georgia, Tennessee and Virginia, are apparently now expanding their ranges from Tennessee into the French Broad River basin in Madison County, North Carolina. Cambarus (Cambarus) eeseeohensis, an endemic species once considered limited in distribution to the Linville River in Avery County, is reported from the Watauga River basin in Watauga County and the Johns River subdrainage of the Catawba River basin in Avery County. Voucher specimens for new localities for an undescribed endemic species, Orconectes (Procericambarus) sp. (the “Cheoah” crayfish), and two invasive species, Orconectes (Gremicambarus) virilis and Orconectes (Procericambarus) rusticus, are provided. A single specimen of a non-native species, Procambarus (Pennides) spiculifer, is reported from a tributary of the Watauga River in Watauga County. Some life history and taxonomic notes for several of the species are included.
AIDSClinical Trials Group (ACTG)
Authors: Andersen Janet W. 
Published: May 2013

AbstractThe AIDS Clinical Trials Group (ACTG) is the largest Network conducting therapeutic clinical trials in AIDS and HIV, with active clinical sites in the United States, South America, Haiti, Africa, India, and Thailand. The ultimate goal of the ACTG is to identify drugs and other treatment modalities that will result in the successful control of HIV in infected persons.
Turbine Engine Component Integration
Authors: Sforza Pasquale M. 
Published: May 2013

Abstract
A fundamental analysis of the matching of the rotating components of a gas turbine engine and their integration into an airframe is presented. Similarity variables are introduced to characterize the operation of the rotating engine components. Performance maps of compressors and turbines are used to illustrate the manner in which they may be matched in terms of power, mass flow, and shaft speed. Because one engine may be used in several different aircraft it must be properly integrated in each. The specific case of matching inlet performance and engine airflow requirements is discussed. An analysis of thrust generation in an aircraft is performed to identify those parameters necessary for monitoring and controlling the thrust in flight. An illustration of the importance of proper positioning of the terminal shock in supersonic inlets and means for controlling that position is presented.
Patient‐Reported Outcomes and the Association With Clinical Response in Patients With Active Psoriatic Arthritis Treated With Golimumab: Findings Through 2 Years of a Phase III, Multicenter, Randomized, Double‐Blind, Placebo‐Controlled Trial
Authors: Kavanaugh Arthur , McInnes Iain B. , Krueger Gerald G. , Gladman Dafna , Beutler Anna , Gathany Tim , Mack Michael , Tandon Neeta , Han Chenglong , Mease Philip 
Published: May 2013

ObjectiveTo evaluate the effect of golimumab on physical function, health‐related quality of life (HRQOL), and productivity in psoriatic arthritis (PsA).MethodsGO‐REVEAL was a multicenter, randomized, placebo‐controlled study. Adult patients with active PsA (n = 405) received golimumab (50 or 100 mg) or placebo every 4 weeks, with early escape at week 16 (placebo → 50 mg, 50 → 100 mg) or placebo crossover to golimumab 50 mg at week 24. Patient‐reported outcomes included physical function (Health Assessment Questionnaire [HAQ] disability index [DI] score), HRQOL (36‐item Short Form health survey [SF‐36] mental component summary [MCS] and physical component summary [PCS] scores), and productivity (home/school/work). Clinical response was assessed using the 28‐joint Disease Activity Score using the C‐reactive protein level (DAS28‐CRP) and the Psoriasis Area and Severity Index (PASI) score for arthritis and skin symptoms, respectively.ResultsAt week 24, golimumab‐treated patients had significant mean improvements in HAQ DI (0.36), SF‐36 (PCS 7.83, MCS 3.84), and productivity (2.24) scores compared with placebo (−0.01, 0.67, −0.60, and 0.08, respectively; P < 0.001 for all). Also, greater proportions of golimumab‐ than placebo‐treated patients had clinically meaningful improvements in HAQ DI (≥0.30) and SF‐36 PCS and MCS (≥5) scores at week 24 (P < 0.05). Also at week 24, improvements in DAS28‐CRP scores were significantly but moderately correlated with improvements in HAQ DI, SF‐36 PCS, and productivity scores. Correlations between these patient‐reported outcomes and improvements in PASI, enthesitis, and dactylitis scores were very weak. Improvements in HAQ DI, SF‐36, and productivity scores were similar among all groups by week 52 and week 104 when including placebo → golimumab crossover patients.ConclusionGolimumab‐treated patients had significant improvements in physical function, HRQOL, and productivity through week 24; these improvements correlated with clinical improvement in signs and symptoms of peripheral arthritis and were sustained through 2 years.
Persistently exciting model predictive control
Authors: Marafioti Giancarlo , Bitmead Robert R. , Hovd Morten 
Published: May 2013

SUMMARYModel predictive control (MPC) is a well‐known and widely used advanced control technique, which is model‐based and capable of handling both input and state/output constraints via receding horizon optimization methods. Fundamentally, MPC is a nondynamic or memoryless state feedback control. Because of its use of a model, MPC should be amenable to adaptive implementation and to on‐line tuning of the model. Such an approach requires guaranteeing signal properties, known as ‘persistent excitation’, to ensure uniform identifiability of the model, often expressed in terms of spectral content or ‘sufficient richness’ of a periodic input. We propose an approach to augment the input constraint set of MPC to provide this guarantee. This, in turn, requires equipping the controller with its own state to capture the control signal history. The feasibility of periodic signals for this condition is established. A computational example is presented illustrating the technique and its properties. Copyright © 2013 John Wiley & Sons, Ltd.
Single‐Walled Carbon Nanotube/Phase Change Material Composites: Sunlight‐Driven, Reversible, Form‐Stable Phase Transitions for Solar Thermal Energy Storage
Authors: Wang Yunming , Tang Bingtao , Zhang Shufen 
Published: May 2013

AbstractThe development of solar energy conversion materials is critical to the growth of a sustainable energy infrastructure in the coming years. A novel hybrid material based on single‐walled carbon nanotubes (SWNTs) and form‐stable polymer phase change materials (PCMs) is reported. The obtained materials have UV‐vis sunlight harvesting, light‐thermal conversion, thermal energy storage, and form‐stable effects. Judicious application of this efficient photothermal conversion to SWNTs has opened up a rich field of energy materials based on novel SWNT/PCM composits with enhanced performance in energy conversion and storage.
LMNA‐associated cardiocutaneous progeria: An inherited autosomal dominant premature aging syndrome with late onset
Authors: Kane Megan S. , Lindsay Mark E. , Judge Daniel P. , Barrowman Jemima , Ap Rhys Colette , Simonson Lisa , Dietz Harry C. , Michaelis Susan 
Published: May 2013

AbstractHutchinson–Gilford Progeria Syndrome (HGPS) is a premature aging disorder caused by mutations in LMNA, which encodes the nuclear scaffold proteins lamin A and C. In HGPS and related progerias, processing of prelamin A is blocked at a critical step mediated by the zinc metalloprotease ZMPSTE24. LMNA‐linked progerias can be grouped into two classes: (1) the processing‐deficient, early onset “typical” progerias (e.g., HGPS), and (2) the processing‐proficient “atypical” progeria syndromes (APS) that are later in onset. Here we describe a previously unrecognized progeria syndrome with prominent cutaneous and cardiovascular manifestations belonging to the second class. We suggest the name LMNA‐associated cardiocutaneous progeria syndrome (LCPS) for this disorder. Affected patients are normal at birth but undergo progressive cutaneous changes in childhood and die in middle age of cardiovascular complications, including accelerated atherosclerosis, calcific valve disease, and cardiomyopathy. In addition, the proband demonstrated cancer susceptibility, a phenotype rarely described for LMNA‐based progeria disorders. The LMNA mutation that caused LCPS in this family is a heterozygous c.899A>G (p.D300G) mutation predicted to alter the coiled–coil domain of lamin A/C. In skin fibroblasts isolated from the proband, the processing and levels of lamin A and C are normal. However, nuclear morphology is aberrant and rescued by treatment with farnesyltransferase inhibitors, as is also the case for HGPS and other laminopathies. Our findings advance knowledge of human LMNA progeria syndromes, and raise the possibility that typical and atypical progerias may converge upon a common mechanism to cause premature aging disease. © 2013 Wiley Periodicals, Inc.
Water, salt water, and alkaline solution uptake in epoxy thin films
Authors: Scott P. , Lees J. M. 
Published: May 2013

ABSTRACTAs a means of characterizing the diffusion parameters of fiber reinforced polymer (FRP) composites within a relatively short time frame, the potential use of short term tests on epoxy films to predict the long‐term behavior is investigated. Reference is made to the literature to assess the effectiveness of Fickian and anomalous diffusion models to describe solution uptake in epoxies. The influence of differing exposure conditions on the diffusion in epoxies, in particular the effect of solution type and temperature, are explored. Experimental results, where the solution uptake in desiccated (D) or undesiccated (U) thin films of a commercially available epoxy matrix subjected to water (W), salt water (SW), or alkali concrete pore solution (CPS) at either 20 or 60°C, are also presented. It was found that the type of solution did not significantly influence the diffusion behavior at 20°C and that the mass uptake profile was anomalous. Exposure to 60°C accelerated the initial diffusion behavior and appeared to raise the level of saturation. In spite of the accelerated approach, conclusive values of uptake at saturation remained elusive even at an exposure period of 5 years. This finding questions the viability of using short‐term thin film results to predict the long‐term mechanical performance of FRP materials. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1898–1908, 2013
Microwave absorption enhancement of Fe3O4/polyaniline core/shell hybrid microspheres with controlled shell thickness
Authors: Zhang Bin , Du Yunchen , Zhang Peng , Zhao Hongtao , Kang Leilei , Han Xijiang , Xu Ping 
Published: May 2013

ABSTRACTSynthesis of Fe3O4/polyaniline (PANI) core/shell hybrid microspheres through an in situ polymerization route with the 300 nm Fe3O4 microspheres as the cores and nucleation sites for PANI is reported. PANI shell thickness, from 30 nm to 120 nm, can be controlled by modulating the weight ratio of aniline monomer and Fe3O4 microspheres. Fe3O4 microspheres that are actually comprised of many small nanoparticles display super paramagnetic feature, which has been maintained in Fe3O4/PANI core/shell hybrid materials. Fe3O4/PANI core/shell hybrid materials have enhanced microwave absorption than both the Fe3O4 microspheres and PANI, where a maximum reflection loss of −37.4 dB at 15.4 GHz has been reached from the sample with a PANI shell thickness of 100 nm. Introduction of dielectric loss, interfacial loss, and improved impedance from coating the Fe3O4 microspheres with PANI should account for the improved microwave absorption properties of the prepared Fe3O4/PANI core/shell hybrid materials. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1909–1916, 2013
Rate‐dependent self‐healing behavior of an ethylene‐co‐methacrylic acid ionomer under high‐energy impact conditions
Authors: Grande Antonio Mattia , Castelnovo Luca , Landro Luca Di , Giacomuzzo Cinzia , Francesconi Alessandro , Rahman Mohammed Arifur 
Published: May 2013

ABSTRACTIn this work, the mechanical and the self‐healing behaviors of an ethylene‐co‐methacrylic acid ionomer were investigated in different testing conditions. The self‐healing capability was explored by ballistic impact tests at low‐velocity, midvelocity, and hypervelocity bullet speed; different experimental conditions such as sample thickness and bullet diameter were examined; in all impact tests, spherical projectiles were used. These experiments, in particular those at low and midspeed, allowed to define a critical ratio between sample thickness and bullet diameter below which full repair was not observed. After ballistic damage, the healing efficiency was evaluated by applying a pressure gradient through tested samples. Subsequently, morphology analysis of the affected areas was made observing all tested samples by scanning electron microscope. This analysis revealed different characteristic features of the damaged zones affected at different projectile speed. Stress–strain curves in uniaxial tension performed at different temperatures and strain rates revealed yield strength and postyield behavior significantly affected by these two parameters. A rise of temperature during high strain rate tests in the viscoplastic deformation region was also detected. This behavior has a strong influence on the self‐repairing mechanism exhibited by the studied material during high‐energy impact tests. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1949–1958, 2013