bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of gerotor oil pump with new rotor profile for improving performance
Authors: Hao Cai , Wenming Yang , Guangming Liu
Published: December 2015

The rapid growth of the automotive and engineering machinery market activates the development of gerotor oil pumps with higher performance. In this paper, a new theoretical tooth profile is proposed. By replacing the constant length of the semi-major axis of an ellipse with a variable related to angle and using the profile normal method, the new profile is derived and illustrated. Then, the clearance of the profile is also discussed by considering the transmission characteristics and specific sliding of rotors. The analysis in this paper shows that the new profile could increase the average flow rate of the pump in low-speed condition, reduce wear, and experience lower fluid resistance on the inner rotor. The significantly increasing pressure ripple in high-speed condition also suggests that a relief groove needs to be redesigned to mitigate this phenomenon. The design idea can serve as a reference in further development of gerotor pumps.
Effects of eccentricity and vibration response on high-speed rigid rotor supported by hybrid foil-magnetic bearing
Authors: Jeong Sena , Lee Yong Bok
Published: December 2015

A hybrid foil-magnetic bearing (HFMB) consists of an air foil bearing (AFB) and an active magnetic bearing (AMB). The HFMB, inherently proposed as a backup bearing for an AMB, has many advantages, such as good controllability and the ability to exhibit preload sharing with the two types of bearings (i.e., the AFB and AMB) in high-speed turbomachinery. However, because the bearing has a limited clearance, the eccentric position of the rotor affects its stability and the reliability parameters of the AFBs such as the initial preload rub. In this study, a rigid rotor supported by an HFMB was operated at speeds of up to 18 kr/min and was tested using a proportional-derivative control algorithm, in order to reduce the vibration amplitude. In addition, to elucidate the effect of the initial eccentric position of the rotor, the control algorithm was started from the initial position of the rotor (X: from –100 to 100 µm and Y: from –80 to 200 µm) using a constant gain value. When the HFMB was active, the magnetic control force was remarkably effective in reducing the subsynchronous vibration of the rotor supported by the HFMB. Eccentricities of 0.2–0.5 corresponded to appropriate rotor positions for the hybrid bearing, and the corresponding load distribution of the AFB was found to be the optimal one. In addition, the proportional-derivative control gain was not very high. The performance of the bearing could be improved further by controlling the eccentricity. An HFMB was tested experimentally, and it was verified that it is possible to determine the effective load carrying capacity for a specific load distribution of the AFB.
Towards a test stand for standardized measurements of the brake emissions
Authors: Perricone Guido , Wahlström Jens , Olofsson Ulf
Published: December 2015

Brake-related particulate matter contributes considerably to the non-exhaust emissions of the transport sector in urban areas of the world. The airborne particle emissions from automotive brakes currently lack any proper regulations. Future regulations require test stands, test cycles and particle instruments to be suitable for measuring the brake emissions. This present work focuses on the design of a novel test stand for reliable measurements of the brake emissions with a high sampling efficiency. A test stand in the form of an inertial disc brake dynamometer was redesigned to allow control of the cleanness of the incoming air and to assure isokinetic sampling. The cleanness of the incoming air, together with an over-pressurized chamber around the brake assembly, ensures that all the particles measured originate from the brake materials. In order to evaluate the novel design, the number and size distributions of the brake emissions are measured online with and without control of the cleanness of the intake air. The results reveal that this test stand can be proposed as a standard test stand to assess objectively the emissions of airborne brake particles in future regulations.
Trip-based optimization methodology for a rule-based energy management strategy using a global optimization routine: the case of the Prius plug-in hybrid electric vehicle
Authors: Mansour Charbel J
Published: December 2015

The fuel savings of plug-in hybrid electric vehicles strongly rely on the energy management strategy deployed onboard. For the current mass-produced plug-in hybrid electric vehicles, notably the Toyota Prius, the energy management strategy is a rule-based type, which is configured to optimize instantly the fuel consumption without taking into consideration the upcoming driving patterns of the given route schedule. Hence, it operates the vehicle first in the electric mode over a predefined all-electric range and then in the charge-sustaining mode. The energy consumption results are seen to be far from optimal when compared with global optimization strategies with prior knowledge of the scheduled route, such as dynamic programming. Hence, this study presents the methodology to optimize the rule-based energy management strategy for real-time implementation in the Prius plug-in hybrid electric vehicle, using dynamic programming as the global optimization routine. The optimization process takes into account the desired trip profile selected by the driver on the vehicle’s onboard Global Positioning System and linked to a traffic management system. A basic rule-based energy management strategy, which emulates the vehicle performance and the energy consumption, has been set first using on-road measurement data logging. As a second step, the dynamic programming optimization routine was applied to the model, assuming a repeated New European Driving Cycle as the scheduled route. The results obtained for the behaviours of the powertrain components under optimal control are evaluated and used to update the operating energy management rules of the basic controller. Finally, an optimized rule-based controller is proposed by coupling between the dynamic programming and the basic rule-based controller, followed by an evaluation of the energy consumption and the powertrain efficiency of the three investigated control strategies.
Effect of internal dynamic excitation of the traction system on the dynamic behavior of a high-speed train
Authors: Huang Guan-hua , Zhou Ning , Zhang Wei-hua
Published: December 2015

This study investigates the effect of an internal dynamic excitation of the traction system on the dynamic performance of a high-speed train. First, a dynamic model of the traction system is developed that considers various complex factors such as the time-varying stiffness of meshing teeth pairs and the gear transmission error. The internal exciting force of the gear is taken to be the result of multiplying its meshing stiffness by its transmission error. Then a multi-body dynamics model of the motor car that includes the driving system is established. Furthermore, a field experiment at a high-speed rail line is performed. Based on the test data, the dynamic characteristics of a high-speed train are analyzed. The obtained results show that the internal dynamic excitation of the traction system can significantly influence the vertical vibration of the frame and gearbox; however, it has little effect on their lateral vibration. The sampling frequency has a major effect on the vibration amplitude of the gearbox; frequency spectrum results show that when the train runs at a high speed, the main vibration frequencies of the gearbox are the meshing frequency and its harmonic frequencies. It is demonstrated that it is necessary to take the internal dynamic excitation into account when assessing the dynamic performance of the gear transmission system.
The contribution of archaeological plant remains in tracing the cultural history of Mediterranean trees: The example of the Roman harbour of Neapolis
Authors: Allevato Emilia , Saracino Antonio , Fici Silvio , Di Pasquale Gaetano
Published: December 2015

In this paper, we present a detailed record of the plant remains recovered on the palaeo-seafloors of Neapolis harbour, spanning ≈700 years, between the 2nd century BC and the 5th century AD, thus intersecting the entire Roman Imperial Age. The site preserved many cultivated or cultivable plant remains, especially from food related trees. This particular feature provided the opportunity to reconstruct the puzzling history of planting them and the Roman economy, especially with respect to food production, the market and to dietary habits. The evidence suggests that Prunus persica, Castanea sativa, Juglans regia and Pinus pinea were locally grown all along the investigated period, testifying for a well advanced arboriculture. A broad presence of P. pinea cones could be related to their large use as stoppers for amphorae which probably was among the driving force for planting it actually influencing its original range. The seafarers had extensive access to dry fruit such as walnut, hazelnut and chestnut that for its imperishable nature and the high energy density, would probably have been part of the food-stocks of the galleys. Chestnut consumption, attested throughout the entire period in the harbour, represents the first strong archaeobotanical evidence of chestnut as food in the Western Mediterranean in Roman time. This evidence shed light on the cultural-social significance of these fruits that was probably eaten mainly or almost exclusively by low social classes. The exceptional find of Hyphaene thebaica for the first time outside its native range is also reported.
Oyster reef die-offs in stratigraphic record of Corpus Christi Bay, Texas, possibly caused by drought-driven extreme salinity changes
Authors: Goff John A , Lugrin Lindsey , Gulick Sean PS , Thirumalai Kaustubh , Okumura Yuko
Published: December 2015

An ultra-high resolution acoustic reflection survey within Corpus Christi Bay, Texas, reveals numerous oyster reefs that have died off and been buried by subsequent sedimentation. The die-offs occurred in four temporal clusters, as evidenced by nearly coterminous capping horizons across multiple reef heads. These horizons can be correlated to published, calibrated radiocarbon dates (2-σ uncertainty: ± ~900 years) derived from cored sediments, and placed into the stratigraphic context. The reefs began growing with the initial flooding of the bay at ~9600 ybp. The first die-offs are coincident with the transition from upper bay to open bay environment at ~8140 ybp, with the greatest concentration of die-offs seaward. Subsequent die-offs occurred ~7600, 6870, and 5800 ybp, with a seaward-to-landward progression. These ages appear to either post-date or be concurrent with published periods of accelerated sea level rise of ~1–4 m. However, because bay oysters ( Crassostrea virginica) are robust with respect to salinity and depth changes, we cannot directly link die-offs with punctuated sea level rise. We hypothesize instead that reef die-offs are associated with extreme salinity changes caused by droughts, based on observations during the 1950s Texas drought. During that event, bay reefs were colonized by open-ocean species ( Crassostrea equestris), which gradually replaced bay oysters progressing seaward to landward in concentration. Subsequent flooding and rapid freshening of the bay caused massive mortality of the colonizing species. These floods also brought abundant fine-grained sedimentation that could bury reefs before they could be recolonized. Such a sequence of events could explain widespread early Holocene, seaward-to-landward oyster reef die-offs during times of more frequent and severe drought conditions. A plausible climatological link exists between periods of low rainfall in Texas and periods of accelerated melting of the polar ice cap, which could explain the evident correlation between reef die-off and sea level rise.
Centennial-scale variations in diatom productivity off Peru over the last 3000 years
Authors: Fleury Sophie , Crosta Xavier , Schneider Ralph , Blanz Thomas , Ther Olivier , Martinez Philippe
Published: December 2015

The Peruvian coastal upwelling is one of the most productive systems in the global ocean, with important impacts on the carbon cycle. Primary productivity there displays strong variations at the interannual to decadal timescales. However, down-core investigations rarely reach sufficient temporal resolution to assess the response of productivity to climatic variations at these timescales beyond the instrumental and historical periods. We here analyzed diatom assemblages, sea-surface temperatures (SSTs), and nitrogen and organic carbon contents on a laminated sediment core from the Peruvian continental shelf to trace variations in regional productivity over the last 3000 years. Our record provides evidence for different climatic and oceanic conditions with more humid and less productive conditions older than 2500 cal. yr BP and drier and more productive conditions younger than 2500 cal. yr BP. The last 2500 years also present much stronger centennial-scale variability with the occurrence of six intervals with higher total diatom abundances and stronger percentages in upwelling-related diatom species, representative of intensified productivity, congruent to lower percentages in benthic diatoms, indicative of reduced rainfall. These six periods were synchronous to intervals of enhanced Walker circulation, suggesting a strong imprint of the Pacific zonal circulation on productivity variations off Peru. Our record also demonstrates that SSTs did not vary in phase with productivity, arguing against the idea of regional SSTs controlled by the upwelling intensity, but were rather in agreement to SST records off southern Chile, suggesting that Peruvian SST variations were largely controlled by oceanic currents at southern high latitudes.
Can the revised UK code direct practice?
Authors: Snelling Paul C.
Published: December 2015

The Nursing and Midwifery Council, the United Kingdom regulator of nursing and midwifery has recently revised its professional code of practice. This article begins by arguing that a professional code must be capable of sustaining close reading and of action guidance. Using four exemplar clauses, it is argued that the new revised code does not meet this purpose. First, I show that in setting out requirements for consent and documentation, the meaning of the relevant clause has changed significantly during the editing process so that a literal reading of the final document bears little relation to established professional practice. Second, I argue that the clause concerning the nature of professional relationships has also been altered during the editing process so that it is inconsistent with other professional groups and established accounts of the professional nurse–patient relationship. Third, I argue that the clause concerning disclosure of confidential information, which survived revision and editing with its meaning intact, is nevertheless factually incorrect and inconsistent with UK law and authoritative guidance. Finally, fourth, I argue that use of the word ‘inappropriate’ is inappropriate as it amounts to meaningless circularity, discussed in relation to a clause on expressing personal beliefs. Taken together, these examples demonstrate that the Code is seriously flawed and does not fulfil its purpose. One way that simple prescriptive clauses in the Code can be usefully understood is through the provision of detailed guidance. I argue that the Nursing and Midwifery Council has changed its position on its view of the value of guidance and has significantly reduced the amount of written guidance and advice it provides. The article concludes by arguing that in order to meet its action directing function, further clarifying revision and the provision of detailed guidance is required.
Investigating the relationship between the relative age effect and leadership behaviors among male ice hockey players
Authors: Chittle Laura , Horton Sean , Weir Patricia , Dixon Jess C
Published: December 2015

This study examined the role of relative age on leadership behaviors among male house league ice hockey players. Athletes completed an online survey that solicited their birthdate along with their responses to the leadership scale for sport. As expected, the results of our analyses revealed no relative age effects. Captains scored significantly higher on the training and instruction, democratic behavior and social support dimensions of the leadership scale for sport. While there were significant multivariate differences between birth quartile and the dimensions of leadership, a relative weight analysis revealed that quartile of birth did not differ significantly on any of these dimensions. Thus, male house league hockey players are not (dis)advantaged in terms of their leadership behaviors as a consequence of relative age.
A Walking Contradiction, Partly Truth and Partly Fiction
Authors: Ellett Alberta J.
Published: December 2015

This article is a critique of David Stoesz' descriptions of organizational issues in child welfare, and more specifically, the relationships between the U.S. Children's Bureau and the National Child Welfare Workforce Institute. The focus is on Stoesz perspectives and assessments of sub-entities (cartels) that are currently influencing funding and programmatic efforts to prepare child welfare employees. The critiq ue also includes Stoesz' perspectives of current child welfare training efforts and issues related to child welfare as a profession. The review ends with a set of summary conclusions about the merit of the Stoesz article.
An Examination of University Conducting Faculty Members’ Score Study Attitudes and Practices
Authors: Silvey Brian A. , Springer D. Gregory , Eubanks Stephen C.
Published: December 2015

The purpose of this study was to examine university conducting teachers’ attitudes about score study, the source materials they used to teach score study, their personal score study practices, and the score study approaches they taught their undergraduate conducting students. Respondents ( N = 236) were members of the College Band Directors National Association who taught undergraduate conducting courses. Our findings indicated that “developing an interpretation of how the music should be performed” was considered the most important reason to study the score, that respondents spent an average of 6 hours in score study per week, and that The Art of Conducting by Donald Hunsberger and Roy Ernst was the most frequently used undergraduate conducting textbook. The two most frequently used personal score study practices, which were also reported as the two most frequently taught practices to undergraduate conductors, were “define all unfamiliar music terms” and “initial, casual read-through of the score.”
Employability and Job Performance as Links in the Relationship Between Mentoring Receipt and Career Success
Authors: Bozionelos Nikos , Kostopoulos Konstantinos , Van der Heijden Beatrice , Rousseau Denise M. , Bozionelos Giorgos , Hoyland Thomas , Miao Rentao , Marzec Izabela , Jędrzejowicz Piotr , Epitropaki Olga , Mikkelsen Aslaug , Scholarios Dora , Van der Heijde Claudia
Published: December 2015

This study developed and tested a model that posited employability and job performance as intervening variables in the relationship between receipt of mentoring and career success. Participants were 207 information technology (IT) professionals employed in small and medium-sized enterprises (SMEs) in three European countries. Mentoring receipt was related to both employability and job performance. Employability mediated the relationship of mentoring receipt with objective and subjective career success, as well as its relationship with job performance. The findings indicate that receipt of mentoring is connected to job performance, a link that has hitherto lacked empirical evidence. In addition, they suggest a pivotal role for employability in the relationship of mentoring receipt with job performance and career success. Overall, this study helps unveil the mechanism through which mentoring affects career outcomes. Moreover, it shows that the benefits of mentoring hold outside the context of large corporations.
Decreased Frequency of IL-17F rs763780 Site Allele G is Associated With Genetic Susceptibility to Immune Thrombocytopenia in a Chinese Population
Authors: Li Huiyuan , Zhou Zeping , Tai Wenlin , Feng Weiyang , Zhang Donglei , Gu Xueping , Yang Renchi
Published: December 2015

Interleukin 17F (IL-17F) is an inflammatory cytokine that plays an important role in autoimmune disease by inducing the expression of multiple chemokines, cytokines, and adhesion molecules. In vitro functional analysis revealed that IL-17F rs763780 polymorphism is associated with IL-17 expression and activity. Thus, considering the abnormal percentage of T helper 17 cells in patients with primary immune thrombocytopenia (ITP), we speculated there was a possible association between the IL-17F rs763780 polymorphisms and genetic susceptibility to ITP in a Chinese Han population. A total of 165 patients with ITP and 149 healthy controls were included in this study, and IL-17F rs763780 polymorphisms were analyzed by a polymerase chain reaction–restriction fragment length polymorphism system. The results showed that the frequency of the IL-17F rs763780 G allele in total patients with ITP or patients with chronic ITP was significantly lower than in normal controls (total ITP 3.6% vs controls 7.7%, P = .026; chronic ITP 3.5% vs controls 7.7%, P = .031). However, no significant difference in genotype frequencies was found among total patients with ITP, patients with chronic ITP, and normal controls. We further analyzed the association of IL-17F polymorphisms with clinical parameters of patients with ITP, and no association revealed between gene distribution and first onset age, clinical therapy response to glucocorticoids, or disease course. What’s more, an evident discrepancy with allelic frequencies was observed between female patients with ITP and gender-matched controls. In conclusion, IL-17F rs763780 polymorphisms may be associated with the development of ITP in a Chinese Han population.
Direct Oral Anticoagulants for Very Elderly People With Atrial Fibrillation
Authors: Pasca Samantha , Venturelli Ugo , Bertone Antonella , Barillari Giovanni
Published: December 2015

Background:

Four direct oral anticoagulants (DOACs) have been licensed for the treatment of atrial fibrillation (AF); efficacy and safety have been shown in clinical trials, but its real use in elderly and very elderly people is still unclear.

Aim:

To evaluate the impact of DOACs in our patients (pts) aged ≥75 years and switched from other treatments.

Methods:

From September 2013 to May 2015, all consecutive pts aged ≥75 years, males and females, in treatment for AF and switched to DOACs are considered in this study. Follow-up (FU) was scheduled after 3 and 6 months by phone and after 12 months by visit.

Results:

Two hundred thirty-two pts in treatment for AF were switched to DOACs, among these 143 (61.6%) pts aged ≥75 years (mean age, 81 years). The medium FU was 9.6 months, during which 4 minor bleedings in 4 different pts and 1 clinically relevant nonmajor bleeding were reported, all treated with temporary cessation or reduction in DOACs. Two strokes occurred in pts in treatment with dabigatran 110 mg, both resolved without serious sequelae; 2.8% of pts had nausea, itching, vomiting, or discomfort, half of these returned to acenocumarol, and the remaining switched to other DOAC. Four pts died, but the deaths were not related to anticoagulation.

Conclusion:

As reported for general people, also in our elderly population, DOACs resulted in a good alternative to old antithrombotic therapies. Efficacy and safety associated with a higher compliance by pts bring these drugs to be the first choice for long-term anticoagulation.
Thrombophilia in 67 Patients With Thrombotic Events After Starting Testosterone Therapy
Authors: Glueck Charles J. , Prince Marloe , Patel Niravkumar , Patel Jaykumar , Shah Parth , Mehta Nishi , Wang Ping
Published: December 2015

We compared thrombophilia in 67 cases (59 men and 8 women) with thrombotic events after starting testosterone therapy (TT) versus 111 patient controls having unprovoked venous thrombotic events without TT. In the 67 patients, thrombosis (47 deep venous thrombosis–pulmonary embolism, 16 osteonecrosis, and 4 ocular thrombosis) occurred 6 months (median) after starting TT. Cases differed from controls for factor V Leiden heterozygosity (16 of the 67 [24%] vs 13 [12%] of the 111, P = .038) and for lupus anticoagulant (9 [14%] of the 64 vs 4 [4%] of the 106, P = .019). After a first thrombotic event and continuing TT, 11 cases had a second thrombotic event, despite adequate anticoagulation, 6 of whom, still anticoagulated, had a third thrombosis. Screening for thrombophilia before starting TT should identify men and women at high risk for thrombotic events with an adverse risk–benefit ratio for TT. When TT is given to patients with familial and acquired thrombophilia, thrombosis may occur and recur in thrombophilic men despite anticoagulation.
Language Problems Among Abused and Neglected Children
Authors: Sylvestre Audette , Bussières Ève-Line , Bouchard Caroline
Published: December 2015

Research data show that exposure to abuse and neglect has detrimental effects on a child’s language development. In this meta-analysis, we analyze studies ( k = 23), to compare the language skills (receptive language, expressive language, pragmatics) of children who have experienced abuse and/or neglect with the language skills of children who have not experienced abuse and/or neglect and to examine whether age or type of maltreatment moderate the relationship between maltreatment and language skills. Results confirm that the language skills of children who have experienced abuse and/or neglect are delayed when compared to children who have not experienced abuse and/or neglect. Compared to older children, young children seem particularly vulnerable to abuse and neglect. No significant differences were demonstrated concerning the type of maltreatment suffered by the child. These findings support the necessity of early detection of language problems in abused and neglected children as well as early intervention in order to implement interventions that will positively stimulate their development.
“Submitting Love?” A Sensory Sociology of Southbourne
Authors: Dean Jon
Published: December 2015

This article seeks to remember the Southbourne building of Sheffield Hallam University, United Kingdom, which housed students, academics, and administrative staff until August 2014. Data were collected from an ethnographic observation study of students handing in completed coursework. Findings are presented in the form of an audio “soundscape” and a literary narrative. It is argued that these hypermodal tools should form a growing part of qualitative inquiry as sensory social research. The historic application and practical impediments of such sensorial and aural techniques are discussed, alongside the challenge they provide to the received practices concerning how journal articles can be experienced.
Mode, Metadata, and Montage
Authors: Percy McClain
Published: December 2015

Simple shifts are capable of producing significant changes in perspective. For me, two drawn lines fundamentally altered my research into learning disability by incorporating visuality and image building. My contribution to this special issue is an arts-based offering in two parts. It is organized around a central narrative, a moment between myself and my learning disabled son where the traditional linguistic mode of communication broke down and was reestablished outside of word-based format. The first part is presented below and written in traditional academic format. It is expressed linguistically and linearly with an introduction and central narrative, followed by a brief conclusive discussion. The second part augments the central linguistic narrative by hyperlinking some of our subsequent visual conversations to illustrate metadata that are linguistically limited, but whose narrative is imbued with rich ethnographic data.
Photography Interrupted
Authors: Ulmer Jasmine B.
Published: December 2015

As the possibilities of hypermodal inquiry intensify against the boundaries of qualitative research, a hypermodal assemblage performs an unfolding–refolding of layers within the space of Deleuzian thought. By exploring a literary question asked by F. Scott Fitzgerald and later repeated by Deleuze, a Deleuzian lens transports the ontologically real into the realm of the postmodern, expanding alternative conceptualizations of the conventional question, “What happened?” Here, layered text, images, and sound flatten into a hypermodal intensity of passageways through poststructural philosophy, literature, and visual art. By exploring hypermodal reading and writing practices, this assemblage reimagines prohibitive thresholds within qualitative inquiry.
. . . anything but synchronized swimming/methodologies . . . artistic movements in/with unknown inventions
Authors: Waterhouse Ann-Hege Lorvik , Otterstad Ann Merete , Jensen Maybritt
Published: December 2015

In a entangled collective assemblage, we create and invent data, we perform the data, and we become data through our engagement in materialities/charcoals/movements/rhythms/sounds . . . We challenge written language, by bodily surfacing haptic technology that interfaces through vibrations and sensations in with us/them/you. Our experimentation invites to think and do research differently by unfolding the conditions of what is not yet thought of to come in research.
Isabel, From Adult Learner to Community Activist
Authors: Flecha Ainhoa
Published: December 2015

This article presents Isabel’s biography as a case study of how Dialogic Literary Gatherings (DLGs) can transform the lives of non-academic women by fostering their social participation. Isabel, an illiterate woman from Barcelona (Spain), engaged in adult education to learn to read and write. This initial motivation was transformed by her participation in DLGs, in which she gained confidence and engaged in women’s organizations, advocating for a more inclusive feminism. More than thirty years later, she has attended international meetings, published articles, and even shared round tables with well-known international feminist scholars such as Judith Butler and Lidia Puigvert.
One Week in CREA (Community of Research on Excellence for All)
Authors: Fernandez Carla
Published: December 2015

This article presents a personal narrative of a teacher who participates in Dialogic Pedagogical Gatherings in Valencia, in which the author explores the personal change that she experienced after spending one week in CREA (Community of Research on Excellence for All) through a process of self-reflection and self-inquiry guided by the identification of the transformative elements characteristic of the communicative methodological approach. The narrative shows how an atmosphere of egalitarian dialogue, where all voices are taken into account, including the voice of a newly arrived person, allowing for the construction of new scientific knowledge and contributing to the transformation of social reality. She analyzes how a week in CREA encouraged her to fall in love again with education, rethink its power of transformation, and give new meaning to her vocation.
Hands on My Hips
Authors: Teman Eric D.
Published: December 2015

These interpretive autoethnographic tales are about my life experiences, growing up in rural Ohio as a queer male. I relive several of the innumerable unfortunate encounters with bullies who have haunted me over the years, partly as a therapeutic means to cope with the lasting effects of those torturous years and partly to potentially reach and touch the lives of others similarly affected. I use performative texts as a powerful means of portraying and articulating my message and persuasively voicing the emotion experienced. I also reflect on the queer predicament and how it has shaped my life.
Traumatic Events Associated With Posttraumatic Stress Disorder
Authors: Lipsky Sherry , Kernic Mary A. , Qiu Qian , Hasin Deborah S.
Published: December 2015

This study sought to examine specific types of potentially traumatic experiences as predictors of posttraumatic stress disorder (PTSD) and the moderating effect of race/ethnicity and major depressive disorder (MDD) among non-Hispanic White, non-Hispanic Black, and Hispanic U.S. women. The study sample was drawn from two waves of the National Epidemiologic Surveys of Alcohol and Related Conditions. Sexual assault, intimate partner violence, and childhood trauma were the strongest predictors of PTSD compared with the reference group (indirect/witnessed trauma). Similar patterns were revealed across racial/ethnic groups, although the estimates were most robust among White women. Findings also suggest that MDD moderates the effect of traumatic experiences on PTSD.
The Migration–Development Nexus in Local Immigration Policy
Authors: Filomeno Felipe Amin
Published: December 2015

In the United States, academic research on local polices for international migration remains predominantly descriptive, methodologically localist, and focused on anti-immigrant policies. By contrast, this study offers a relational perspective on local immigration policy, arguing that a convergence of efforts by local governments and by immigrant communities at upward social mobility favors the emergence of inclusionary local immigration policies. This effect is facilitated by the predominance of Democratic partisanship and the presence of a bifurcated ethnic composition in localities. This theory is developed through a strategic narrative of the immigration policies of Baltimore City in the context of the U.S. rustbelt. Covering the period from the late 1970s to 2015, the narrative is based on information from official documents, news articles, academic literature, and official statistics.
Combined Aortic Valve Replacement and Renal Cell Carcinoma Thrombectomy
Authors: Martinelli Susan M. , Lobonc Andrew , Wallen Eric M. , Stansfield William E. , Selph J. Patrick , Calvo Benjamin , Kumar Priya A.
Published: December 2015

Although nephrectomy for renal cell carcinoma with inferior vena cava invasion is a common procedure, it is rare to have level IV invasion necessitating cardiopulmonary bypass (CPB). Furthermore, it is exceptionally rare to perform cardiac surgery concomitantly with this resection. We report a case in which an aortic valve replacement was done in the same surgical setting as a level IV thrombectomy. We have demonstrated that although it can be difficult to manage the coagulopathy post-CPB, this can be successfully accomplished with adequate prior preparation and a coordinated team effort.
Graffiti and the Critical Power of Urban Space
Authors: Pugh Emily
Published: December 2015

Analyzing graffiti—the image, the act, and the space in which it unfolds—reveals the institutional structures that shape urban spaces, and this is particularly evident in the context of Wall-era West Berlin. Through an investigation of two Berlin Wall graffiti-based artworks, Gordon Matta-Clark’s Made in America from 1976 and Keith Haring’s 1986 Berlin Wall mural, this article considers how these artists used graffiti practice to reveal the economic, social, and political processes with which West Berlin was connected and which it signified. In analyzing Matta-Clark’s and Haring’s artworks, these works’ specific political and historical contexts, and the specific institutions that sponsored their creation, the author considers the relationship of specific examples of graffiti to the larger processes from which they emerged. The author furthermore argues that considering individual examples of graffiti, on their own terms, is crucial to understanding the relationships between their creation and the power structures that govern urban spaces in which they are created.
Radical Distribution
Authors: Burk Tara
Published: December 2015

Toward its goal of ending the AIDS crisis, ACT UP (the AIDS Coalition to Unleash Power) used ephemeral media to stage demonstrations. Slogans such as “SILENCE = DEATH” and “ALL PEOPLE WITH AIDS ARE INNOCENT” galvanized collective action and took control of the unjust representation of gay men and other minorities with AIDS. Updating protest tactics for the headline-driven televisuality of late 20th-century American society, ACT UP relied on ephemera as a mode of distribution for activist slogans and images. Ephemeral materials provided activists with a powerful mode of representation that was inexpensive to reproduce. This essay examines the means by which ACT UP and its associated collectives deployed visual ephemera to create a ubiquitous presence in New York City, when AIDS cases there were among the highest in the United States. Against histories of ACT UP that acknowledge the importance of agitprop but neglect to fully account for its status as ephemera, I argue that the ephemeral properties of activist materials are central to the meaning of these cultural artifacts, and meaningful because they enabled the discursive and spatial representations of collectivity that defined and sustained the most active period of ACT UP, from the mid-1980s to the mid-1990s.
Who will attack the competitors? How political parties resolve strategic and collective action dilemmas in negative campaigning
Authors: Dolezal Martin , Ennser-Jedenastik Laurenz , Müller Wolfgang C
Published: December 2015

Negative campaigning presents parties with a collective action problem. While parties would prefer to have their competitors attacked, potential backlash effects from negative messages mean that individual politicians typically lack the incentives to carry out such attacks. We theorize that parties solve this problem by implementing a division of labour that takes into account the incentives of individual office holders, their availability for campaign activity, and media relevance. Drawing on these arguments we expect that holders of high public office and party leaders are less likely to issue attacks, leaving the bulk of the ‘dirty work’ to be carried out by party floor leaders and general secretaries. Examining almost 8000 press releases issued by over 600 individual politicians during four election campaigns in Austria, we find strong support for our theoretical expectations.
Towards the future of the domestic hotel in Thailand
Authors: Pearce Philip L , Thanksooks Jarujes
Published: December 2015

In this study of domestic hotels in Thailand, a timeline approach was used to build a cumulative set of insights. Using archival analysis, the study initially traces the development of the domestic hotel in Thailand by exploring hotel sector growth in Thailand from 1962 to 2012. Building on these insights, the perspectives of key stakeholders towards the current state and future development of Thai domestic hotels were then studied empirically. Questionnaire and interviews were conducted with 334 domestic tourists and 33 hotel operators in Prachaup Khirikhan, Chon Buri and Nakhon Ratchasima provinces. Broadly, the prospects for these types of properties were seen as sound with operators and customers predominantly adopting an optimistic view. Key action features for attention to ensure this optimism is not unfounded were identified. The analysis of domestic hotels and change in a leading Asian destination adds novelty and broadens the patterns of trends that can be detected in the global, smaller scale hotel sector.
Pervasive information gathering and data mining for efficient business administration
Authors: Garrigos-Simon Fernando J , Llorente Roberto , Morant Maria , Narangajavana Yeamduan
Published: December 2015

Following a multidisciplinary perspective (that combines the literature from management, information systems, marketing and engineering telecommunications perspectives), the purpose of this article is to create and analyze a conceptual framework and to propose a new methodology that encompasses different techniques for pervasive information gathering in hotels and for identifying clients’ habits. Focusing on the future of hotels, this work presents new technologies for hotels suitable for correlating the customers’ on-site activities with online activities including passive location tracking using Wi-Fi devices’ connectivity, customer satisfaction evaluated via facial or voice recognition using inbuilt cameras/microphones altogether with data mining analysis. Moreover, this article explains how multidisciplinary consumer behavior can be analyzed by data mining to include this information in the vacation marketing approach for efficient business administration.
Travel needs revisited
Authors: Tasci Asli DA , Ko Yong Jae
Published: December 2015

The reasons for human desire to wander away from the normal environment for pleasure purposes have long been the focus of academic attention. Empirical studies revealed many scales for assessing needs in different contexts and for different groups of travelers. The objective of the current study is to develop and validate a comprehensive yet concise Travel Needs Scale (TNS) with a general applicability in different types of travels. The initial pool of items is developed from the literature, followed by a survey design applied on an online research platform. The results of the confirmatory factor analysis support the psychometric property of the scale. The resultant TNS, comprised of self-actualization, social affiliation, arousal, and escape, reflects the fundamental needs of various types of travelers and provides a framework to guide future research. Theoretical and practical implications are discussed.
Examining the moderating role of prior knowledge in the relationship between destination experiences and tourist satisfaction
Authors: Huang Songshan (Sam) , Afsharifar Amin , Veen Robert van der
Published: December 2015

This study investigated the moderating role of tourist prior knowledge in the relationship between major destination experience components (i.e. attraction, infrastructure, restaurants and service performance) and tourist satisfaction. Data were collected from international tourists visiting Shiraz, Iran, via a questionnaire survey. Partial least squares structural equation modelling (PLS-SEM) was applied to analyse the data, and the multi-group comparison approach was adopted to test the moderating role of prior knowledge. Findings reveal that tourist prior knowledge moderated the effects of destination experience components on tourist satisfaction in a differentiated way. The effects of service performance and restaurants on tourist satisfaction were more significantly moderated by tourist prior knowledge than the effects of attraction and infrastructure on tourist satisfaction. This study suggests that destination experiences enabled by human performance are more important in contributing to tourist satisfaction for those tourists with little knowledge about the destination. Destination marketing implications are discussed.
Trading in unicorns: The role of exchange etiquette in managing the online second-hand sale of sentimental babywearing wraps
Authors: Djohari Natalie
Published: December 2015

Since the 1970s, an international market has been growing in the production and sale of fabric specifically woven for ‘babywearing’. These ‘wraps’, a simple piece of cloth for baby carrying, have a long tradition throughout the world but are increasingly marketed to ‘high-end’ collectors as well as ‘modern’ young parents. New releases of limited edition and boutique ranges create competition over highly desirable and often quite unattainable wraps that must be tempted out or awaited in the second-hand forums. The community describes the search for these desperately desired goods as the search for ‘unicorns’. But obtaining one’s unicorn requires others to part with material objects made incommensurable through the intimate, inter-embodied ‘skinship’ practice of wrapping and carrying a child. This article explores how the emotional entanglement of these second-hand goods is negotiated through an emerging exchange etiquette that attempts to protect the illusion that one is trading in incommensurable goods.
Effect of terrorism on demand for tourism in Kenya: A comparative analysis
Authors: Buigut Steven
Published: December 2015

This paper uses dynamic panel model to compare the effect of terrorism on developed and emerging country demand for tourism in Kenya. Quarterly data spanning 2010Q1 to 2013Q4, sourced from the Kenyan National Bureau of Statistics, for 27 developed and 34 emerging countries is used. Intensity of terror attack measured by fatalities significantly reduces tourist arrivals from developed countries but not from emerging countries. A 1% increase in fatality reduces arrivals from developed countries by 0.082%. This translates to 2487 visitors per year, or roughly 155.8 million Kenya shillings lost annually from an increase of one fatality per quarter.
Interaction forms in successful collaborative learning in virtual learning environments
Authors: Vuopala Essi , Hyvönen Pirkko , Järvelä Sanna
Published: December 2015

Despite the numerous studies on social interaction in collaborative learning, little is known about interaction forms in successful computer-supported collaborative learning situations. The purpose of this study was to explore and understand student interaction in successful collaborative learning during a university course which was mediated by two different types of virtual learning environment. Through a qualitative case study, we examined how students interacted with each other while working with collaborative tasks. Results indicate that interaction in collaborative situations was more often group-related than task-related. Group-related interaction concentrated mostly on coordination of group work, such as planning and organising group activities. Task-related interaction was mostly in the form of comments or answers to earlier messages. However, there were differences in the interaction forms according to the learning environment. The results of this study provide teachers, educators and educational coordinators guidelines for how to organise and enhance successful collaborative learning both virtually and face-to-face.
Public Service Broadcasting and Data-Driven Personalization
Authors: Andersson Schwarz Jonas
Published: December 2015

Through an interview-based study of Swedish public service broadcasting (PSB) companies, I explore the ways in which these institutions react to and interact with a set of normative conceptions of a contemporary digital media ecology characterized by social networking and personalization of the media experience. The respondents were engaged in negotiations of how to realistically maintain public values in a commercially configured online milieu. The nature of organizational adaptation within PSB is found to be complex. Several elements of the Nordic PSB model appear to counteract acquiescence to algorithmically aided personalization: its majoritarian heritage, its institutional caution toward data positivism, favoring more interpretive editorial audience knowledge, and the high costs and structural consequences of making individual users uniquely identifiable. These organizational ambitions and obstacles are embodied in recent innovations that act to mimic a personalized delivery, however, doing so without utilizing algorithmically aided prediction and instead favoring manual editorial selection.