bluuebunny/crossref_metadata_2025_split huggingface dataset:
When More Is Less: Field Evidence on Unintended Consequences of Multitasking
Authors: Goes Paulo B. , Ilk Noyan , Lin Mingfeng , Zhao J. Leon 
Published: June 2017

Online customer service chats provide new opportunities for firms to interact with their customers and have become increasingly popular in recent years for firms of all sizes. One reason for their popularity is the ability for customer service agents to multitask (i.e., interact with multiple customers at a time) thereby increasing the system “throughput” and agent productivity. Yet little is known about how multitasking impacts customer satisfaction—the ultimate goal of customer engagements. We address this question using a proprietary data set from an S&P 500 service firm that documents agent multitasking activities (unobservable to customers) in the form of server logs, customer service chat transcripts, and postservice customer surveys. We find that agent multitasking leads to longer in-service delays for customers and lower problem resolution rates. Both lead to lower customer satisfaction, although the impact varies for different customers. Our study is among the first to document the link between multitasking and customer satisfaction, and it has implications for the design of agent time allocation in contact centers and more broadly for how firms can best manage customer relations in new service channels enabled by information technology. The online appendix is available at https://doi.org/10.1287/mnsc.2017.2763 . This paper was accepted by Lorin Hitt, information systems.
Corporate Cash Hoarding: The Role of Just-in-Time Adoption
Authors: Gao Xiaodan 
Published: June 2017

I explore the role of the just-in-time (JIT) inventory system in the increase in cash holdings by U.S. manufacturing firms. I develop a model to illustrate the mechanism through which JIT affects cash and quantify its impact. In the model, both cash and inventory can serve as working capital. As firms switch from the traditional system to JIT, they shift resources from inventory to cash to facilitate transactions with suppliers. On average, this switchover accounts for a 4.1-percentage-point increase in the cash-to-assets ratio, which is approximately 28% of the change observed in the data. Data are available at https://doi.org/10.1287/mnsc.2017.2775 . This paper was accepted by Neng Wang, finance.
Radiation reduction of minimally invasive transforaminal lumbar interbody fusion with localisation system in overweight patients
Authors: Fan G. , Fu Q. , Zhang J. , Zhang H. , Gu X. , Wang C. , Gu G. , Guan X. , Fan Y. , He S. 
Published: June 2017

Aims Minimally invasive transforaminal lumbar interbody fusion (MITLIF) has been well validated in overweight and obese patients who are consequently subject to a higher radiation exposure. This prospective multicentre study aimed to investigate the efficacy of a novel lumbar localisation system for MITLIF in overweight patients. Patients and Methods The initial study group consisted of 175 patients. After excluding 49 patients for various reasons, 126 patients were divided into two groups. Those in Group A were treated using the localisation system while those in Group B were treated by conventional means. The primary outcomes were the effective radiation dosage to the surgeon and the exposure time. Results There were 62 patients in Group A and 64 in Group B. The mean effective dosage was 0.0217 mSv (standard deviation (sd) 0.0079) in Group A and 0.0383 mSv (sd 0.0104) in Group B (p < 0.001). The mean fluoroscopy exposure time was 26.42 seconds (sd 5.91) in Group A and 40.67 seconds (sd 8.18) in Group B (p < 0.001). The operating time was 175.56 minutes (sd 32.23) and 206.08 minutes (sd 30.15) (p < 0.001), respectively. The mean pre-operative localisation time was 4.73 minutes (sd 0.84) in Group A and 7.03 minutes (sd 1.51) in Group B (p < 0.001). The mean screw placement time was 47.37 minutes (sd 10.43) in Group A and 67.86 minutes (sd 14.15) in Group B (p < 0.001). The pedicle screw violation rate was 0.35% (one out of 283) in Group A and 2.79% (eight out of 287) in Group B (p = 0.020). Conclusion The study shows that the localisation system can effectively reduce radiation exposure, exposure time, operating time, pre-operative localisation time, and screw placement time in overweight patients undergoing MITLIF. Cite this article: Bone Joint J 2017;99-B:944–50.
Outcomes after early return to theatre following hip hemiarthroplasty for intracapsular fracture of the femoral neck
Authors: Mamarelis G. , Key S. , Snook J. , Aldam C. 
Published: June 2017

Aims Hip hemiarthroplasty is a standard treatment for intracapsular proximal femoral fractures in the frail elderly. In this study we have explored the implications of early return to theatre, within 30 days, on patient outcome following hip hemiarthroplasty. Patients and Methods We retrospectively reviewed the hospital records of all hip hemiarthroplasties performed in our unit between January 2010 and January 2015. Demographic details, medical backround, details of the primary procedure, complications, subsequent procedures requiring return to theatre, re-admissions, discharge destination and death were collected. Results A total of 705 procedures were included; 428 Austin Moore and 277 Exeter Trauma Stems were used. A total of 34 fractures (in 33 patients) required early return to theatre within 30 days. Age, gender, laterality, time from admission to primary procedure, American Society of Anesthesiologists grade, and implant type were similar for those requiring early return to theatre and those who did not. Early return to theatre was associated with a significantly higher length of stay (mean 33.6 days (7 to 107) versus 18.6 days (0 to 152), p < 0.001), re-admission rate (38.2% versus 8.6%, p < 0.001), and subsequent revision rate (17.6% versus 1.3%, p < 0.001). We found no difference in level of care required on discharge or mortality. Conclusion Proximal femoral fractures are common in the elderly population, with far-reaching medical and economic implications. Factors such as infection or dislocation may require early return to theatre, and this is associated with outcomes which may be both medically and economically detrimental. This illustrates the importance of avoiding early complications to improve longer term outcome. Return to theatre within 30 days is associated with longer length of stay, higher re-admission rate, and higher subsequent revision rate. It may be a useful short-term quality indicator for longer term outcome measures following hip hemiarthroplasty for intracapsular fractures of the proximal femur. Cite this article: Bone Joint J 2017;99-B:958–63.
Risk factors for wear-related failures after hip resurfacing in patients with a low contact patch to rim distance
Authors: Amstutz H. C. , Le Duff M. J. , Bhaurla S. K. 
Published: June 2017

Aims A contact patch to rim (CPR) distance of < 10 mm has been associated with edge-loading and excessive wear. However, not all arthroplasties with a low CPR distance show problems with wear. Therefore, CPR distance may not be the only variable affecting the post-operative metal ion concentrations. Patients and Methods We used multiple logistic regression to determine what variables differed between the patients who had high and low cobalt (CoS) and chromium (CrS) serum ion concentrations within a cohort of patients with low (< 10 mm) CPR distances. A total of 56 patients treated with unilateral hip resurfacing arthroplasty (HRA) had CoS and CrS ion studies performed more than one year after surgery. The mean age of the patients at the time of surgery was 51.7 years (29 to 70), with 38 women (68%) and 18 men (32%). Results It was seen that 47 patients had low ion levels (< 7µg/L) and nine had high ion levels (≥ 7µg/L). We found increased risks of high wear with decreasing CPR distance. Conclusion The use of CPR distance measurements to predict hips at risk for elevated wear is needed for all patients with HRA. We recommend that patients with low CPR distances have at least one serum ion study performed while patients with CPR distance > 10 mm do not need routine ion studies. We believe that patients with low CPR distance and low ions do not need repeat ion studies unless the patient becomes symptomatic or has substantial radiographic changes. Cite this article: Bone Joint J 2017;99-B:865–71.
An unexpected diagnosis of breast malignancy
Authors: Richardson T , Cottier F 
Published: June 2017

Inflammatory breast cancer constitutes 5% of all breast cancer diagnoses. Diagnosis is based on clinical signs including skin changes, erythema and oedema, together with rapid progression and involvement of more than one-third of the affected breast. It is an aggressive tumour with great metastatic potential, metastases being present in 30% of patients at first presentation. Primary non-Hodgkin’s lymphoma of the breast is rare but is well reported. It accounts for 0.5% of all breast malignancies and 1% of all non-Hodgkin’s diagnoses. Prognosis of primary breast lymphoma varies depending on the stage of disease with stage IE having a 5-year survival rate of 78–83% and stage IIE having a 5-year survival rate of 20–57%. We present a rare case of non-Hodgkin’s lymphoma mimicking an inflammatory breast cancer. The aim of this case report is to highlight an unusual presentation of non-Hodgkin’s lymphoma and the diagnostic difficulties that arise.
A Multi-Method Investigation of Pragmatic Development in Individuals With Down Syndrome
Authors: Lee Michelle , Bush Lauren , Martin Gary E. , Barstein Jamie , Maltman Nell , Klusek Jessica , Losh Molly 
Published: June 2017

AbstractThis longitudinal study examined pragmatic language in boys and girls with Down syndrome (DS) at up to three time points, using parent report, standardized and direct assessments. We also explored relationships among theory of mind, executive function, nonverbal mental age, receptive and expressive vocabulary, grammatical complexity, and pragmatic competence. Controlling for cognitive and language abilities, children with DS demonstrated greater difficulty than younger typically developing controls on parent report and standardized assessments, but only girls with DS differed on direct assessments. Further, pragmatic skills of individuals with DS developed at a delayed rate relative to controls. Some sex-specific patterns of pragmatic impairments emerged. Theory of mind and executive function both correlated with pragmatic competence. Clinical and theoretical implications are discussed.
STRESS TESTS FOR VIDEOSTREAMING SERVICES BASED ON RTSP PROTOCOL
Authors: Chanchí Golondrino Gabriel Elías , Urbano Ordoñez Franco Arturo , Campo Muñoz Wilmar Yesid 
Published: June 2017

El videostreaming es una de las tecnologías que actualmente tiene repercusiones importantes en diferentes contextos como la educación, la salud y el sector empresarial; todo lo anterior gracias a las facilidades que esta brinda para el acceso a contenidos multimedia de manera remota, ya sea en vivo o en diferido, permitiendo la comunicación independientemente de la ubicación geográfica. Uno de los protocolos estándar que permite la implementación de esta tecnología es RTSP, sin embargo dado que la mayoría de servidores de aplicaciones y servicios en internet están soportados en peticiones HTTP, es poco el trabajo que se ha realizado en cuanto a la generación de herramientas, para realizar pruebas de estrés sobre servidores de streaming. Este artículo presenta una herramienta de medición de estrés llamada Hermes, desarrollada en el lenguaje Python, la cual permite el cálculo de los tiempos de respuesta en el establecimiento de conexiones RTSP a servidores de streaming, así como la obtención de datos de consumo de memoria RAM y porcentaje de uso de CPU de estos servidores. Hermes fue desplegada dentro de en un entorno de videostreaming, sobre el cual se realizó la evaluación de estrés para el servidor LIVE555, usando para ello invocaciones en segundo plano a los clientes libres VLC y OpenRTSP.
Implantación de un sistema de gestión de seguridad de información bajo la ISO 27001: análisis del riesgo de la información
Authors: Arévalo Ascanio José Gregorio , Bayona Trillos Ramón Armando , Rico Bautista Dewar Willmer 
Published: June 2017

En este artículo se explora la estructura de la actividad empresarial de la ciudad de Ocaña con el propósito de ampliar la información y el conocimiento de las principales variables de la actividad productiva del municipio, su vocación empresarial, desarrollo tecnológico y estructura del tejido productivo. Para ello, se realizó una investigación descriptiva que consistió en identificar la actividad económica en sus diversas manifestaciones y promover la ejecución de prácticas administrativas acordes con referentes nacionales e internacionales.Los resultados permitieron establecer las debilidades empresariales, incluyendo las de la información, que una vez identificadas sirven para diseñar espacios de formación, adquisición de habilidades y prácticas gerenciales en los empresarios acordes con los retos de la competitividad y permanencia en el mercado.A partir de los resultados se recopiló información referente al componente tecnológico de las empresas del tejido productivo de la ciudad, para las cuales se propone la aplicación de herramientas para el análisis de sistemas de información usando la norma ISO 27001:2005, mediante el uso de tecnologías de información más apropiadas para las organizaciones del estudio, que protejan su activo más importante: la información.
Finansowanie oparte na publikacjach – Model norweski
Authors: Sivertsen Gunnar 
Published: June 2017

Model norweski stanowi próbę całościowego ujęcia recenzowanych publikacji naukowych we wszystkich obszarach wiedzy – z uwzględnieniem preferowanych typów publikacji i języków publikacji w naukach humanistycznych – za pomocą jednego ważonego wskaźnika, pozwalającego porównywać efekty badań naukowych wewnątrz różnych instytutów i wydziałów oraz pomiędzy instytucjami badawczymi. W artykule opisano główne składniki Modelu, metodę jego wdrożenia oraz efekty i doświadczenia trzech krajów wykorzystujących go, w których przeprowadzono jego ewaluację: Belgii (Flandrii), Danii i Norwegii. Zakończenie zawiera analizę Modelu z perspektywy nauk humanistycznych.
Punktoza jako strategia w grze parametrycznej w Polsce
Authors: Kulczycki Emanuel 
Published: June 2017

W artykule stosuję pojęcie „gry parametrycznej”, aby opisać strategię pracy akademickiej pojawiającej się w Polsce jako efekt wprowadzenia polityk punktowego nagradzania dorobku naukowego. „Gra parametryczna” oznacza realizowanie badań i publikowanie ich wyników w taki sposób, aby spełniać wymagania danego systemu ewaluacji nauki. W grze tej badacze mogą używać dwóch strategii. Pierwszą jest „impactitis”, w ramach której tylko publikacje w czasopismach z wysokim Impact Factorem są uznawane w danej społeczności akademickiej. Drugą strategią jest „punktoza”. Polega ona na tym, że bardziej opłacalne jest opublikowanie kilku artykułów w czasopiśmie bez Impact Factora niż opublikowanie jednego artykułu w wysoko punktowanym czasopiśmie. Na podstawie polskiego systemu ewaluacji nauki (parametryzacji) pokazuję główne mechanizmy wytwarzania punktozy oraz takie, które mają ograniczać negatywne konsekwencje grania w parametryczną grę. Tekst kończy się dyskusją na temat rozwiązań polskiego systemu oraz rekomendacjami, jak system ten można ulepszyć i jakie lekcje należy wyciągnąć z obecnej sytuacji. Przedstawione konkluzje są istotne zarówno dla badaczy, jak i decydentów z obszaru polityki naukowej z innych krajów.
Biphasic response as a mechanism against mutant takeover in tissue homeostasis circuits
Authors: Karin Omer , Alon Uri 
Published: June 2017

AbstractTissues use feedback circuits in which cells send signals to each other to control their growth and survival. We show that such feedback circuits are inherently unstable to mutants that misread the signal level: Mutants have a growth advantage to take over the tissue, and cannot be eliminated by known cell‐intrinsic mechanisms. To resolve this, we propose that tissues have biphasic responses in which the signal is toxic at both high and low levels, such as glucotoxicity of beta cells, excitotoxicity in neurons, and toxicity of growth factors to T cells. This gives most of these mutants a frequency‐dependent selective disadvantage, which leads to their elimination. However, the biphasic mechanisms create a new unstable fixed point in the feedback circuit beyond which runaway processes can occur, leading to risk of diseases such as diabetes and neurodegenerative disease. Hence, glucotoxicity, which is a dangerous cause of diabetes, may have a protective anti‐mutant effect. Biphasic responses in tissues may provide an evolutionary stable strategy that avoids invasion by commonly occurring mutants, but at the same time cause vulnerability to disease.
Health Services Use by Late Preterm and Term Infants From Infancy to Adulthood: A Meta-analysis
Authors: Isayama Tetsuya , Lewis-Mikhael Anne-Mary , O’Reilly Daria , Beyene Joseph , McDonald Sarah D. 
Published: June 2017

CONTEXT:
Late-preterm infants born at 34 to 36 weeks’ gestation have increased risks of various health problems. Health service utilization (HSU) of late-preterm infants has not been systematically summarized before.

OBJECTIVES:
To summarize the published literature on short- and long-term HSU by late-preterm infants versus term infants from infancy to adulthood after initial discharge from the hospital.

DATA SOURCES:
We searched Medline, Embase, the Cumulative Index to Nursing and Allied Health Literature, and PsycINFO.

STUDY SELECTION:
Cohort and case-control studies that compared HSU (admissions, emergency department visits, etc) between late-preterm infants and term infants were included.

DATA EXTRACTION:
Data extracted included study design, setting, population, HSU, covariates, and effect estimates.

RESULTS:
Fifty-two articles were included (50 cohort and 2 case-control studies). Meta-analyses with random effect models that used the inverse-variance method found that late-preterm infants had higher chances of all-cause admissions than term infants during all the time periods. The magnitude of the differences decreased with age from the neonatal period through adolescence, with adjusted odds ratios from 2.34 (95% confidence intervals 1.19–4.61) to 1.09 (1.05–1.13) and adjusted incidence rate ratios from 2.62 (2.52–2.72) to 1.14 (1.11–1.18). Late-preterm infants had higher rates of various cause-specific HSU than term infants for jaundice, infection, respiratory problems, asthma, and neurologic and/or mental health problems during certain periods, including adulthood.

LIMITATIONS:
Considerable heterogeneity existed and was partially explained by the variations in the adjustment for multiple births and gestational age ranges of the term infants.

CONCLUSIONS:
Late-preterm infants had higher risks for all-cause admissions as well as for various cause-specific HSU during the neonatal period through adolescence.
Situação-Problema: um Método para o Ensino de Economia
Authors: Campetti Pedro Henrique De Morais , De Campos Daniela 
Published: June 2017

O ensino de Economia apresenta desafios no sentido de ser eficaz na ação de gerar aprendizagens significativas aos alunos. Isso ocorre em razão da especificidade dos conteúdos e competências trabalhados em aula e nas diferentes possibilidades que se abrem para a prática docente. Por um lado, há o método tradicional, com a centralidade do professor. Por outro, há uma heterogeneidade de metodologias que podem ser utilizadas e gerar resultados profícuos. Portanto, este artigo tem por objetivo analisar a aplicação de uma metodologia de ensino diferenciada: a abordagem por meio de situação-problema, voltada para o ensino de Economia. Para a revisão bibliográfica, foram utilizadas contribuições teóricas do campo da Educação. Do ponto de vista metodológico, trata-se de uma pesquisa aplicada e exploratória, sendo utilizado o método de estudo de caso. Em relação aos resultados, estes revelam que a proposta pedagógica utilizada contribuiu para uma aprendizagem mais significativa dos alunos.
O trabalho colaborativo no contexto escolar: contribuições do individual ao coletivo mediadas pelo Pibid
Authors: Duarte Arita Mendes , Pinto Carmem Lúcia Lascano , Barreiro Cristhianny Bento 
Published: June 2017

O presente artigo tem por objetivo discorrer a respeito do trabalho colaborativo evidenciado na prática docente de professoras alfabetizadoras participantes de um percurso formativo mediado pelo Programa Institucional de Bolsas de Iniciação à Docência (Pibid), Essa política pública implantada pelo governo federal tem como objetivo qualificar a formação docente inicial e continuada de estudantes das licenciaturas e é direcionada a professores em serviço. A investigação caracteriza-se como uma abordagem qualitativa com opção pelo estudo de caso. Participaram do estudo as duas professoras titulares das turmas de 1º e 2º ano, a diretora da escola e a coordenadora pedagógica dos anos iniciais. Para a coleta de dados, tratados por análise de conteúdo, foram utilizados como instrumentos: observação direta da prática docente e entrevistas semiestruturadas. A análise desses dados aponta para os benefícios do trabalho colaborativo entre professoras e estudantes da escola básica.
Boldogság tényezők a pedagógusok munkájában
Authors: Kun Ágota , Szabó Anett 
Published: June 2017

Háttér és célok
A munkahelyi jóllét és boldogság empirikus kutatása egyre nagyobb teret nyer már hazai viszonylatban is. Jelen kutatás a magyar pedagógusok munka során átélt boldogságának legfőbb dimenziói és jellemzői feltárását tűzte ki célul kvalitatív és kvantitatív módszerrel.

Módszer
A vizsgálat részeként 297 pedagógus „Mikor él át/érez boldogságot a munkája során?” nyílt kérdésre adott válaszai, valamint Lyubomirsky és Lepper (1999) nevével fémjelzett, Szubjektív Boldogság Skálán (Subjective Happiness Scale) kapott eredményei kerültek feldolgozásra.

Eredmények
A szöveges válaszok tartalomelemzése során négy fő dimenzió rajzolódott ki. A pedagógus munka-boldogság élményében a legmarkánsabb meghatározók az eredményesség és siker tényezője, a munkájukra vonatkozó értékelés és visszajelzés, a munkaélményt jelentő tényezők, valamint a társas kapcsolatok. A vizsgált háttérváltozók (pl. a nem, az elégedettség, a munkastressz, az egészségi és családi állapot) közül több is értelmezhető kapcsolatot mutat a Szubjektív Boldogság Skála globális boldogság mutatójával.

Következtetések
Eredményeink ismeretében, különböző, pozitív pszichológiai intervenciós lehetőségeket is számba véve, gyakorlati megfontolásokat teszünk a munkahelyi jóllét és boldogság növelése érdekében. Ezen javaslatok nemcsak specifikusan a pedagógusok, de más munkakörben dolgozók szempontjából is relevánsak lehetnek.