bluuebunny/crossref_metadata_2025 huggingface dataset:
Model of Emerging Technology Adoption (META): Virtual Reality as a Case Study
Authors: Halaweh Mohanad
Published: May 2019

Although technology acceptance and adoption have been intensively investigated using well-established theories called the Technology Acceptance Model (TAM) and Innovation Diffusion Theory (IDT), this paper claims that Emerging Technology (ET) has particular characteristics that differentiate it from the adoption of traditional technology that has been used for a long time. Therefore, it argues that TAM and IDT are not sufficient to investigate the adoption of ET. Investigating the adoption of ET requires additional, unique, non-traditional factors (constructs). Therefore, this paper aims first to conceptually develop a model of ETs adoption (META). To achieve this objective, TAM and IDT will be reviewed. Then, this paper will use the characteristics of ET as the basis for developing the factors that influence the adoption of ET. Secondly, to validate the model, a case study of an ET (i.e. Virtual Reality) will be analysed in-depth to reveal the factors that influence on its adoption by applying META. A discussion of META applications and implications for future research are also provided.
Combination of Complementary Technological Knowledge to Generate “Hard to Imitate” Technologies
Authors: Zhang Feng , Jiang Guohua
Published: May 2019

Valuable technological knowledge attracts more imitations. In light of knowledge-level perspective, this study investigates how firms could generate rare and valuable knowledge that is also hard to imitate. By applying specialised complementary assets concept to the technological portfolio of a firm, we show that core and background technological knowledge from internal and external sources, respectively, are complementarily combined to create new technologies that delay inter-firm knowledge externalities and that generate significant intra-firm knowledge flows simultaneously. The results suggest that the combination of knowledge in certain technological categories would have significant appropriability benefits, allowing firms to generate valuable and hard to imitate technological knowledge. This finding contributes to knowledge management, patent economics, and appropriability literature. Managerial implications for knowledge management are also discussed.
Backfill mining alternatives and strategies for mitigating shallow coal mining hazards in the western mining area of China
Authors: Sun Qiang , Zhang Jixiong , Qi Wenyue , Li Meng
Published: May 2019

This study addresses the major geo-environmental hazards caused by shallow coal mining in China's western eco-environment frangible area. These hazards are related to the high overburden pressure, surface subsidence, soil and water losses, and land desertification, with consequent vegetation and wildlife losses. To mitigate these hazards, three alternative backfill mining methods are proposed, for three typical shallow coal mining conditions, using aeolian sand-based backfilling materials, which are readily available in this area. The main influencing factor is the backfill material compaction ratio. Its effect on aquiclude deformation and water-conducting fracture evolution are assessed by numerical and physical simulation methods. The potential application of the proposed backfill coal mining alternatives is evaluated and discussed in detail. The results obtained are considered to be valuable for developing a strategy for the coordinated exploitation of coal resources and environmental protection in China's western frangible eco-environment area.
Comprehensive Characterization of an Open Source Document Search Engine
Authors: Hadjilambrou Zacharias , Kleanthous Marios , Antoniou Georgia , Portero Antoni , Sazeides Yiannakis
Published: May 2019

This work performs a thorough characterization and analysis of the open source Lucene search library. The article describes in detail the architecture, functionality, and micro-architectural behavior of the search engine, and investigates prominent online document search research issues. In particular, we study how intra-server index partitioning affects the response time and throughput, explore the potential use of low power servers for document search, and examine the sources of performance degradation ands the causes of tail latencies. Some of our main conclusions are the following: (a) intra-server index partitioning can reduce tail latencies but with diminishing benefits as incoming query traffic increases, (b) low power servers given enough partitioning can provide same average and tail response times as conventional high performance servers, (c) index search is a CPU-intensive cache-friendly application, and (d) C-states are the main culprits for performance degradation in document search.
Leveraging Kernel-Incorporated Matrix Factorization for App Recommendation
Authors: Liu Chenyang , Cao Jian , Feng Shanshan
Published: May 2019

The ever-increasing number of smartphone applications (apps) available on different app markets poses a challenge for personalized app recommendation. Conventional collaborative filtering-based recommendation methods suffer from sparse and binary user-app implicit feedback, which results in poor performance in discriminating user-app preferences. In this article, we first propose two
kernel incorporated probabilistic matrix factorization
models, which introduce app-categorical information to constrain the user and app latent features to be similar to their neighbors in the latent space. The two models are solved by
Stochastic Gradient Descent
with a user-oriented negative sampling scheme. To further improve the recommendation performance, we construct pseudo user-app ratings based on user-app usage information, and propose a novel
kernelized non-negative matrix factorization
by incorporating non-negative constraints on latent factors to predict user-app preferences. This model also leverages user--user and app--app similarities with regard to app-categorical information to mine the latent geometric structure in the pseudo-rating space. Adopting the
Karush--Kuhn--Tucker
conditions, a
Multiplicative Updating Rules
based optimization is proposed for model learning, and the convergence is proved by introducing an auxiliary function. The experimental results on a real user-app installation usage dataset show the comparable performance of our models with the state-of-the-art baselines in terms of two ranking-oriented evaluation metrics.
Translations Diversification for Expert Finding
Authors: Dehghan Mahdi , Abin Ahmad Ali
Published: May 2019

Expert finding is the task of retrieving and ranking knowledgeable people in the subject of user’s query. It is a well-studied problem that has attracted the attention of many researchers. The most important challenge in expert finding is to determine the similarity between query words and documents authored by candidate experts. One of the most important challenges in Information Retrieval (IR) community is the issue of vocabulary gap between queries and documents. In this study, a translation model based on words clustering in two query and co-occurrence spaces is proposed to overcome this problem. First, the words that are semantically close, are clustered in a query space and then each cluster in this space are clustered again in a co-occurrence space. Representatives of each cluster in the co-occurrence space are considered as a diverse subset of the parent cluster. By this method, the query translations are expected to be diversified in the query space. Next, a probabilistic model, that is based on the belonging degree of word to cluster and similarity of cluster to query in the query space, is used to consider the problem of vocabulary gap. Finally, the corresponding translations to each query are used in conjunction with a combination model for expert finding. Experiments on Stack Overflow dataset show the effectiveness of the proposed method for expert finding.
Noble Gases: A Record of Earth's Evolution and Mantle Dynamics
Authors: Mukhopadhyay Sujoy , Parai Rita
Published: May 2019

Noble gases have played a key role in our understanding of the origin of Earth's volatiles, mantle structure, and long-term degassing of the mantle. Here we synthesize new insights into these topics gained from high-precision noble gas data. Our analysis reveals new constraints on the origin of the terrestrial atmosphere, the presence of nebular neon but chondritic krypton and xenon in the mantle, and a memory of multiple giant impacts during accretion. Furthermore, the reservoir supplying primordial noble gases to plumes appears to be distinct from the mid-ocean ridge basalt (MORB) reservoir since at least 4.45 Ga. While differences between the MORB mantle and plume mantle cannot be explained solely by recycling of atmospheric volatiles, injection and incorporation of atmospheric-derived noble gases into both mantle reservoirs occurred over Earth history. In the MORB mantle, the atmospheric-derived noble gases are observed to be heterogeneously distributed, reflecting inefficient mixing even within the vigorously convecting MORB mantle. ▪ Primordial noble gases in the atmosphere were largely derived from planetesimals delivered after the Moon-forming giant impact. ▪ Heterogeneities dating back to Earth's accretion are preserved in the present-day mantle. ▪ Mid-ocean ridge basalts and plume xenon isotopic ratios cannot be related by differential degassing or differential incorporation of recycled atmospheric volatiles. ▪ Differences in mid-ocean ridge basalts and plume radiogenic helium, neon, and argon ratios can be explained through the lens of differential long-term degassing.
Droughts, Wildfires, and Forest Carbon Cycling: A Pantropical Synthesis
Authors: Brando Paulo M. , Paolucci Lucas , Ummenhofer Caroline C. , Ordway Elsa M. , Hartmann Henrik , Cattau Megan E. , Rattis Ludmila , Medjibe Vincent , Coe Michael T. , Balch Jennifer
Published: May 2019

Tropical woody plants store ∼230 petagrams of carbon (PgC) in their aboveground living biomass. This review suggests that these stocks are currently growing in primary forests at rates that have decreased in recent decades. Droughts are an important mechanism in reducing forest C uptake and stocks by decreasing photosynthesis, elevating tree mortality, increasing autotrophic respiration, and promoting wildfires. Tropical forests were a C source to the atmosphere during the 2015–2016 El Niño–related drought, with some estimates suggesting that up to 2.3 PgC were released. With continued climate change, the intensity and frequency of droughts and fires will likely increase. It is unclear at what point the impacts of severe, repeated disturbances by drought and fires could exceed tropical forests’ capacity to recover. Although specific threshold conditions beyond which ecosystem properties could lead to alternative stable states are largely unknown, the growing body of scientific evidence points to such threshold conditions becoming more likely as climate and land use change across the tropics. ▪ Droughts have reduced forest carbon uptake and stocks by elevating tree mortality, increasing autotrophic respiration, and promoting wildfires. ▪ Threshold conditions beyond which tropical forests are pushed into alternative stable states are becoming more likely as effects of droughts intensify.
Monitoring patient-ventilator breath contribution in the critically ill during neurally adjusted ventilatory assist: reliability and improved algorithms for bedside use
Authors: Jonkman Annemijn H. , Jansen Diana , Gadgil Suvarna , Keijzer Christiaan , Girbes Armand R. J. , Scheffer Gert-Jan , van der Hoeven Johannes G. , Tuinman Pieter Roel , Spoelstra-de Man Angélique M. E. , Sinderby Christer S. , Heunks Leo M. A.
Published: May 2019

The patient-ventilator breath contribution (PVBC) index estimates the relative contribution of the patient to total tidal volume (Vtinsp) during mechanical ventilation in neurally adjusted ventilator assist mode and has been used to titrate ventilator support. The reliability of this index in ventilated patients is unknown and was investigated in this study. PVBC was calculated by comparing tidal volume (Vtinsp) and diaphragm electrical activity (EAdi) during assisted breaths (Vtinsp/EAdi)assist and during unassisted breaths (Vtinsp/EAdi)no-assist. Vtinsp was normalized to peak EAdi (EAdipeak) using 1) one assisted breath, 2) five consecutive assisted breaths, or 3) five assisted breaths with matching EAdi preceding the unassisted breath (N1PVBC2, X5PVBC2, and [Formula: see text], respectively). In addition, PVBC was calculated by comparing only Vtinsp for breaths with matching EAdi (PVBCβ2). Test-retest reliability of the different PVBC calculation methods was evaluated with the intraclass correlation coefficient (ICC) using five repeated PVBC maneuvers performed with a 1-min interval. In total, 125 PVBC maneuvers were analyzed in 25 patients. ICC [95% confidence interval] values were 0.46 [0.23–0.66], 0.51 [0.33–0.70], and 0.42 [0.14–0.69] for N1PVBC2, X5PVBC2, [Formula: see text], respectively. Complex waveform analyses showed that insufficient EAdi filtering by the ventilator software affects reliability of PVBC calculation. With our new EAdi-matching techniques reliability improved (PVBCβ2 ICC: 0.78 [0.60–0.90]). We conclude that current techniques to calculate PVBC exhibit low reliability and that our newly developed criteria and estimation of PVBC—using Vtinsp of assisted breaths and unassisted breaths with matching EAdi—improves reliability. This may help implementation of PVBC in clinical practice.

NEW & NOTEWORTHY The patient-ventilator breath contribution (PVBC) index estimates the relative contribution of the patient to tidal volume generated by the patient and the mechanical ventilator during mechanical ventilation in neurally adjusted ventilator assist mode. It could be used to titrate ventilator support and thus to limit development of diaphragm dysfunction in intensive care unit patients. Currently available methods for bedside assessment of PVBC are unreliable. Our newly developed criteria and estimation of PVBC largely improve reliability and help to quantify patient contribution to total inspiratory effort.
Heart and musculoskeletal hemodynamic responses to repetitive bouts of quadriceps static stretching
Authors: Venturelli Massimo , Rampichini Susanna , Coratella Giuseppe , Limonta Eloisa , Bisconti Angela Valentina , Cè Emiliano , Esposito Fabio
Published: May 2019

The role of sympathetic and parasympathetic activity in relation to the repetitive exposure to static stretching (SS) on heart and musculoskeletal hemodynamics in stretched and resting muscles is still a matter of debate. The aim of the study was to determine cardiac and musculoskeletal hemodynamics to repetitive bouts of unilateral SS. Sympathetic and parasympathetic activity contribution to the central hemodynamics and local difference in circulation of stretched and resting muscles were also investigated. In eight participants, heart rate (HR), cardiac output (CO), mean arterial pressure (MAP), HR variability (HRV), blood pressure variability (BPV), and blood flow in passively stretched limb (SL) and control (CL, resting limb) were measured during five bouts of unilateral SS (45 s of knee flexion and 15 s of knee extension). SS increased sympathetic (~20%) and decreased parasympathetic activity (~30%) with a prevalence of parasympathetic withdrawal. During SS, HR, CO, and MAP increased by ~18 beats/min, ~0.29 l/min, ~12 mmHg, respectively. Peak blood flow in response to the first stretching maneuver increased significantly (+377 ± 95 ml/min) in the SL and reduced significantly (−57 ± 48 ml/min) in the CL. This between-limb difference in local circulation response to SS disappeared after the second SS bout. These results indicate that heart hemodynamic responses to SS are primarily influenced by the parasympathetic withdrawal rather than by the increase in sympathetic activity. The balance between neural and local factors contributing to blood flow regulation was affected by the level of SS exposure, likely associated with differences in the bioavailability of local vasoactive factors throughout the stretching bouts.

NEW & NOTEWORTHY Repetitive exposure to static stretching (SS) on heart and musculoskeletal hemodynamics in stretched and remote muscles may be influenced by neural and local factors. We documented that SS-induced heart hemodynamic responses are primarily influenced by parasympathetic withdrawal. The balance between neural and local factors contributing to the regulation of musculoskeletal hemodynamics is dependent on SS exposure possibly because of different local vasoactive factor bioavailability during the subsequent stretching bouts.
Secure Communications Based on the Projective Synchronization of Four‐Dimensional Hyperchaotic Systems
Authors: Abdul Rahman Salahuddin , Zribi Mohamed , Smaoui Nejib
Published: May 2019

This paper deals with the projective synchronization (PS) of two identical discrete‐time generalized four‐dimensional (4D) hyperchaotic Henon maps using a master‐slave configuration. A discrete sliding mode controller (DSMC) scheme is proposed to synchronize the master and the slave systems. The performance of the controlled systems is simulated; the simulation results indicate that the proposed controller works well. In addition, a secure communication scheme is proposed based on the developed control scheme. The validity of the proposed scheme is tested by transmitting an image and simulating the results. The simulation results clearly indicate the effectiveness of the proposed secure communication scheme.
Sizing Control and Hardware Implementation of a Hybrid Wind-Solar Power System, Based on an ANN Approach, for Pumping Water
Authors: Zarrad Ons , Hajjaji Mohamed Ali , Jemaa Aymen , Mansouri Mohamed Nejib
Published: May 2019

In our day, solar energy and wind energy are becoming more and more used as renewable sources by various countries for different uses such as in an isolated home. These energies admit a unique limitation related to the characteristic of energy instability. For this, the objective of this manuscript is to command and synchronize the power flow of a hybrid system using two sources of energy (solar and wind). The first contribution of our work is the utilization of an artificial neural network controller to command, at fixed atmospheric conditions, the maximum power point. The second contribution is the optimization of the system respecting real-time constraints to increase a generating system performance. As a matter of fact, the proposed system and the controller are modeled using MATLAB/Simulink and a Xilinx System Generator is utilized for hardware implementation. The simulation results, compared with other works in the literature, present high performance, efficiency, and precision. The suggested system and its control strategy give the opportunity of optimizing the hybrid power system performance, which is utilized in rural pumping or other smart house applications.
Numerical Method of Flexible Pavement considering Moisture and Stress Sensitivity of Subgrade Soils
Authors: Li Jue , Zheng Jianlong , Yao Yongsheng , Zhang Junhui , Peng Junhui
Published: May 2019

Weaknesses of the subgrade structure induce the asphalt surface diseases and shorten the service life of flexible pavement. However, the resilient modulus (Mr) of subgrade soils is difficult to be evaluated directly since the subgrade is hidden and covered by the granular or asphalt layer. This study aimed to establish a numerical approach to predict the dynamic behavior of flexible pavements considering the stress sensitivity and moisture variation of subgrade soils. Firstly, 2D FEM simulations of flexible pavements were performed with half‐sine loadings. A constitutive model of subgrade soils was proposed to incorporate soil suction and octahedral shear stress. It was validated using the laboratory triaxial test data of 3 selected soils. Then, the developed model was programmed by the user‐defined material subroutine (UMAT) in the software ABAQUS. Subsequently, the validity of FEM model was verified by the laboratory tank model. Finally, the effect of moisture contents on the dynamic response of pavement structures was studied by tensile stress and vertical compressive strain. Results show that the surface deflection of the FEM model is similar to that of the actual pavement structure with the R2 of 98.44%. The developed UMAT program is reliable since the distribution of Mr in the FEM model is influenced by the stress and moisture condition of subgrade soils. When the moisture content is increased by 63%, the average Mr of subgrade soils is decreased by 18.7%. Meanwhile, the stiffness softening of subgrade soils increases vertical compressive strain at the top of the subgrade and the tensile stress at the bottom of the surface layer. It is interesting that the developed model can be applied to analyze the fatigue cracking of both subgrade and surface layers in the future.
Effect of Silver Nanoparticles on Tropical Freshwater and Marine Microalgae
Authors: Pham Thanh-Luu
Published: May 2019

The increase in synthesis and application of silver nanoparticles (AgNPs) in the last decade has resulted in contamination of AgNPs in the aquatic environment. The presence of AgNPs in aquatic environments has posed toxic effects to aquatic organisms and ecological damage. In this study, two tropical microalgae species including the freshwater Scenedesmus sp. and the marine diatom Thalassiosira sp. were employed to examine the toxic effects of AgNPs. The toxic effects were determined by analyzing different end points, such as half maximal effective concentration (EC50), algae growth inhibition, algae cell size, chlorophyll-a content, and total lipid accumulation. The results suggested that AgNPs presented different toxicity mechanisms for microalgae and showed to be more toxic in freshwater than in marine environment. The EC50 values of AgNPs after 72 h for the growth inhibition of Scenedesmus sp. and Thalassiosira sp. were 89.92 ± 9.68 and 107.21 ± 7.43 μg/L, respectively. AgNPs at a certain concentration have resulted in change in cell diameter, reduction in chlorophyll-a content, and enhancement of the total lipid production in the tested microalgae. Thus, local species should be involved in the toxic assessment. This research contributes on understanding the toxicity of AgNPs on freshwater and marine environments.
Dysfunction of Poly (ADP-Ribose) Glycohydrolase Induces a Synthetic Lethal Effect in Dual Specificity Phosphatase 22-Deficient Lung Cancer Cells
Authors: Sasaki Yuka , Fujimori Hiroaki , Hozumi Miyuki , Onodera Takae , Nozaki Tadashige , Murakami Yasufumi , Ashizawa Kazuto , Inoue Kengo , Koizumi Fumiaki , Masutani Mitsuko
Published: May 2019

Poly (ADP-ribose) glycohydrolase (PARG) is the main enzyme responsible for catabolism of poly (ADP-ribose) (PAR), synthesized by PARP. PARG dysfunction sensitizes certain cancer cells to alkylating agents and cisplatin by perturbing the DNA damage response. The gene mutations that sensitize cancer cells to PARG dysfunction-induced death remain to be identified. Here, we performed a comprehensive analysis of synthetic lethal genes using inducible PARG knockdown cells and identified dual specificity phosphatase 22 (DUSP22) as a novel synthetic lethal gene related to PARG dysfunction. DUSP22 is considered a tumor suppressor and its mutation has been frequently reported in lung, colon, and other tumors. In the absence of DNA damage, dual depletion of PARG and DUSP22 in HeLa and lung cancer A549 cells reduced survival compared with single-knockdown counterparts. Dual depletion of PARG and DUSP22 increased the apoptotic sub-G1 fraction and upregulated PUMA in lung cancer A549, PC14, and SBC5 cells, and inhibited the PI3K/AKT/mTOR pathway in A549 cells, suggesting that dual depletion of PARG and DUSP22 induced apoptosis by upregulating PUMA and suppressing the PI3K/AKT/mTOR pathway. Consistently, the growth of tumors derived from double knockdown A549 cells was slower compared with those derived from control siRNA-transfected cells. Taken together, these results indicate that DUSP22 deficiency exerts a synthetic lethal effect when combined with PARG dysfunction, suggesting that DUSP22 dysfunction could be a useful biomarker for cancer therapy using PARG inhibitors.

Significance:

This study identified DUSP22 as a novel synthetic lethal gene under the condition of PARG dysfunction and elucidated the mechanism of synthetic lethality in lung cancer cells.
The Pro-Oncogenic Adaptor CIN85 Acts as an Inhibitory Binding Partner of Hypoxia-Inducible Factor Prolyl Hydroxylase 2
Authors: Kozlova Nina , Mennerich Daniela , Samoylenko Anatoly , Dimova Elitsa Y. , Koivunen Peppi , Biterova Ekaterina , Richter Kati , Hassinen Antti , Kellokumpu Sakari , Manninen Aki , Miinalainen Ilkka , Glumoff Virpi , Ruddock Lloyd , Drobot Lyudmyla Borysivna , Kietzmann Thomas
Published: May 2019

The EGFR adaptor protein, CIN85, has been shown to promote breast cancer malignancy and hypoxia-inducible factor (HIF) stability. However, the mechanisms underlying cancer promotion remain ill defined. Here we show that CIN85 is a novel binding partner of the main HIF-prolyl hydroxylase, PHD2, but not of PHD1 or PHD3. Mechanistically, the N-terminal SRC homology 3 domains of CIN85 interacted with the proline-arginine–rich region within the N-terminus of PHD2, thereby inhibiting PHD2 activity and HIF degradation. This activity is essential in vivo, as specific loss of the CIN85–PHD2 interaction in CRISPR/Cas9-edited cells affected growth and migration properties, as well as tumor growth in mice. Overall, we discovered a previously unrecognized tumor growth checkpoint that is regulated by CIN85-PHD2 and uncovered an essential survival function in tumor cells by linking growth factor adaptors with hypoxia signaling.

Significance:

This study provides unprecedented evidence for an oxygen-independent mechanism of PHD2 regulation that has important implications in cancer cell survival.
Disaggregating Hispanic American Cancer Mortality Burden by Detailed Ethnicity
Authors: Zamora Steven M. , Pinheiro Paulo S. , Gomez Scarlett Lin , Hastings Katherine G. , Palaniappan Latha P. , Hu Jiaqi , Thompson Caroline A.
Published: May 2019

Background:

Hispanics are the largest minority population in the United States (18%). They represent a heterogeneous and growing population. Cancer is the leading cause of death among Hispanics, yet few studies have described cancer mortality burden by specific Hispanic group nationwide.

Methods:

Cancer-related deaths from U.S. death certificates for the years 2003–2012 were analyzed for decedents identifying as Mexican, Puerto Rican, Cuban, and Central or South American. We calculated descriptive statistics, including potential years of lives lost (PYLL), age-adjusted rates, standardized mortality ratios, and fitted JoinPoint regression models, to evaluate annual trends by Hispanic group, using non-Hispanic Whites (NHW) as the reference population.

Results:

We identified 287,218 cancer-related deaths among Hispanics and 4,570,559 among NHWs. Mortality trends were heterogeneous across Hispanic groups. Female NHWs and male Puerto Ricans had the greatest rates of adjusted PYLL per 1,000 (NHWs, 19.6; Puerto Ricans, 16.5). Liver cancer was ranked among the top 5 cancer-related deaths for every Hispanic group, but not for NHWs. Stomach cancer mortality was twice as high for most Hispanic groups when compared with NHWs and especially high for Mexicans [male standardized mortality ratio (SMR), 2.07; 95% confidence interval (CI), 2.01–2.13; female SMR, 2.62; 95% CI, 2.53–2.71].

Conclusions:

We observed marked heterogeneity in cancer mortality across Hispanic groups. Several cancers affect Hispanics disproportionately compared with NHWs. Screening programs in Hispanics should be considered for stomach and liver cancer.

Impact:

Disaggregated analysis of Hispanics is needed to fully understand cancer burden among the diverse Hispanic population and is critical for cancer prevention and control efforts.
A viola em construção: a ação da tradição e da contemporaneidade sobre a viola de dez cordas no século XXI
Authors: Almeida Renato Teixeira , Barbeitas Flavio
Published: May 2019

O objetivo desta comunicação é tentar compreender quais os elementos que, atualmente, se fazem presentes e atuantes para a construção da viola caipira, ou viola de dez cordas. Para tal procurou-se entender o processo de formação da tradição caipira do instrumento e como essa tradição se apresenta frente à ação dos movimentos contemporâneos e suas miscigenações, nos dias de hoje. Baseado na dissertação de mestrado defendida em 2013 pelo autor, na qual foram feitas uma avaliação histórica da viola, bem como entrevistas com nomes importantes, além da aplicação de questionário avaliativo com violeiros e amantes da viola pode-se sugerir que estas duas forças não são excludentes, mas antes se combinam para a construção da viola de dez cordas do século XXI.
Viola Caipira: criação e reflexão estética baseadas na livre improvisação, no timbre e no gesto musical
Authors: Serpe Fábio Rodrigo , Yampolschi Roseane
Published: May 2019

O autor desta pesquisa desenvolve um trabalho artístico na área de criação musical a partir de uma aproximação entre a viola caipira, desde seu contexto performático e sócio-cultural, e o universo da música contemporânea, particularmente, por meio de estudos sobre a improvisação, timbre e gesto. Este trabalho tem por finalidade apresentar novas possibilidades sonoras e composicionais para a viola caipira, de modo a ampliar o seu repertório. Desse modo, o autor se vale de uma investigação de elementos característicos do repertório tradicional da viola caipira – tanto do ponto de vista de seus materiais musicais como dos resultados sonoros gestuais mais idiomáticos –, do estudo de processos de escrita e da pesquisa de técnicas estendidas na performance deste instrumento e de outros afins na música atual. Estas atividades serão complementadas com a livre improvisação servindo como reservatório de materiais experimentais a serem desenvolvidos durante a composição. Posteriormente, será elaborado um memorial, com detalhamento das decisões relevantes tomadas durante o processo compositivo, bem como uma reflexão sobre as escolhas estéticas, gestos e técnicas utilizadas.
Carinhoso, de Pixinguinha, para viola de 10 cordas solo: arranjo e análise
Authors: Ferrer Marcus
Published: May 2019

A viola vem se desenvolvendo no Brasil ao longo de cinco séculos e tem participado/ajudado na construção das tradições culturais do país. Além do vasto repertório já consolidado, nosso olhar volta-se para outros ambientes culturais/musicais e procura testar, basicamente por meio de composições, de arranjos e de transcrições, a possibilidade utilização deste instrumento. Neste artigo, apresentaremos uma das linhas/ambientes com os quais temos lidado, como foco de nossa pesquisa com a viola - o Choro, com um arranjo da obra Carinhoso, de Pixinguinha.
The first Ichneumonid fossil from the Early Pleistocene of Madeira Island (Portugal)
Authors: GÓIS-MARQUES CARLOS A. , JESUS JOSÉ , DE SEQUEIRA MIGUEL MENEZES , MADEIRA JOSÉ
Published: May 2019

In oceanic islands, well age-constrained deposits containing arthropod somatofossils (body fossils) are rare. However, when available, these are important for providing empirical and independent minimum ages for molecular phylogenetic dating and complementary data on taxonomy, evolution and palaeobiogeography information of the biological groups found as fossils. This is especially important for taxa that speciated within oceanic islands, many becoming single island endemics (SIE). Recently, associated with a 1.3 Ma (Calabrian) fluvial and lacustrine sedimentary deposit from Porto da Cruz in Madeira Island (Fig. 1), a wing, putatively identified as Hymenoptera, was found. Here we describe this wing fossil as belonging to Ichneumonidae, a group with ca. 30% of SIE in Madeira Island. Moreover, this is the first somatofossil of ichneumonid parasitic wasps found in Madeira Island and in Macaronesian islands (i.e. Azores, Madeira, Canaries and Cabo Verde).
New records and new species of mites from Cuba, with description of a new genus of Laelapidae (Acari: Mesostigmata)
Authors: JOHARCHI OMID , HALLIDAY BRUCE , TOLSTIKOV ANDREI V. , TRACH VIACHESLAV A.
Published: May 2019

This paper presents a new genus, two new species, and several new records of mites associated with insects and soil in Cuba. A new monotypic genus of Laelapidae, Acantholaelaps gen. nov., is described to accommodate a new species, A. strategus sp. nov., on the basis of adult female and male specimens collected on Strategus sarpedon (Burmeister) (Coleoptera: Scarabaeidae) and Strategus surinamensis hirtus Sternberg (Coleoptera: Scarabaeidae). The other species recorded were Macrocheles merdarius (Berlese) (Macrochelidae), Asca quinquesetosa Wharton (Ascidae), Gaeolaelaps cubaensis sp. nov. (Laelapidae) and Pseudoparasitus missouriensis (Ewing) (Laelapidae).
On some new and old soft scale insects (Hemiptera: Coccomorpha: Coccidae) from Africa, with description of a new Coccus species and introduction of a new genus
Authors: ŁAGOWSKA BOŻENA , HODGSON CHRIS J.
Published: May 2019

A new species of soft scale (Hemiptera: Coccomorpha; Cocccidae) from South Africa, Coccus giliomeei Łagowska & Hodgson sp. n., collected on Gymnosporia buxifolia (L.) Szyszyl, is described and illustrated. Also, Coccus rhodesiensis (Hall) is recorded for the first time from South Africa and is redescribed and illustrated based on the adult females of the type series and fresh South African specimens. An updated key to the species of Coccus and similar species known from Africa is included. Based on this latter study, (i) Marsipococcus proteae (Brain) and M. durbanensis (Brain) are considered not to be congeneric with Marsipococcus marsupialis (Green), the type species of Marsipococcus Cockerell & Bueker, and are placed in a new genus Proteacoccus Łagowska & Hodgson, gen. n. with Lecanium proteae Brain as the type species; (ii) it is considered that Coccus asiaticus Lindinger is clearly not a junior synonym of Parasaissetia nigra (Nietner) and is accepted as a full species, rev. stat., and (iii) Neoplatylecanium adersi (Newstead) is considered to be non-conspecific with N. cinnamomi Takahashi, the type species of Neoplatylecanium Takahashi, and is transferred to Maacoccus Tao & Wong, as Maacoccus adersi (Newstead), comb. n.
A taxonomic study on Themus (Telephorops) davidis species-group (Coleoptera, Cantharidae), with description of a new species from China
Authors: YANG YUXIA , ZONG LE , YANG XINGKE , LIU HAOYU
Published: May 2019

Themus (Telephorops) davidis species-group is redefined and we present a catalogue, identification key and distribution map for this group. Some previously known species are redescribed and we provide new illustrations of female internal genitalia, abdominal sternite VIII and/or aedeagus. Further, we report new distribution data. A new species, Themus (Telephorops) hainanus sp. nov. from China (Hainan) is described, and Themus (Telephorops) birmanicus Wittmer, 1983 is recorded from China for the first time.
Salivary Clear Cell Carcinoma Clinicopathologic Characteristics and Outcomes: A Population-Based Analysis
Authors: Sharbel Daniel D. , Unsal Aykut A. , Groves Michael W. , Albergotti William G. , Byrd J. Kenneth
Published: May 2019

Background:

Salivary clear cell carcinoma is an uncommon, low-grade malignancy for which limited data describing predictive clinicopathologic factors and treatment outcomes exist because of rarity.

Methods:

The authors queried the Surveillance, Epidemiology, and End Results database from 1982 to 2014. Multivariate Cox and Kaplan-Meier analyses were performed to determine disease-specific survival (DSS) and predictive clinicopathologic factors.

Results:

One hundred ninety-eight patients with salivary clear cell carcinoma were included. Overall incidence was 0.011 per 100 000 individuals, with no significant annual percentage change across years (−0.93%, P = .632). Five-, 10-, and 20-year DSS rates were 81.3% (n = 117), 69.6% (n = 94), and 55.3% (n = 68), respectively. Men (hazard ratio, 4.74; P = .0087) and patients with regional (hazard ratio, 5.59; P = .018) or distant (hazard ratio, 8.9; P = .01) metastases carried a worse prognosis. Five-year DSS was greater in patients with localized disease (96.36%, P < .0001) than those with regional or distant metastases. Treatment with surgery alone had better 10-year DSS (86.3%) compared with treatment with combination radiation and surgery (57.6%) or radiation monotherapy (18.75%, P < .0001).

Conclusions:

Salivary clear cell carcinoma carries an overall good prognosis. Patients with localized disease and those treated with surgery alone have more favorable prognoses. Male patients and those with regional or distant metastatic disease at time of presentation carry a worse prognosis.

Level of Evidence:

N/A
Everyday technologies and public space participation among people with and without dementia
Authors: Gaber Sophie N. , Nygård Louise , Brorsson Anna , Kottorp Anders , Malinowsky Camilla
Published: May 2019

Background.

Occupational therapists support everyday technology use; however, it is necessary to consider the challenges that people with dementia encounter with everyday technologies when participating in various places within public space.

Purpose.

The purpose of the study was to explore stability and change in participation in places visited within public space in relation to the relevance of everyday technologies used within public space.

Method.

People with dementia ( n = 35) and people with no known cognitive impairment ( n = 34) were interviewed using the Participation in Activities and Places Outside Home Questionnaire and the Everyday Technology Use Questionnaire. Data analysis used modern and classical test theory.

Findings.

Both samples participated in places within public space; however, participation and relevance of everyday technologies were significantly lower for the dementia group.

Implications.

To enable participation, occupational therapists need to be aware of challenges that technologies and places within public space present to people with dementia.
‘There is a crack in everything’: An ethnographic study of pragmatic resistance in a manufacturing organization
Authors: McCabe Darren , Ciuk Sylwia , Gilbert Margaret
Published: May 2019

Why is resistance a pervasive feature of organizations? We seek to add to the established ways of understanding resistance by arguing that it may emerge owing to the rationality and irrationality, order and disorder that imbues organizations. We explore how such conditions create ambivalent situations that can generate resistance that is ambivalent itself as it can both facilitate and hinder the operation of organizations. Drawing on ethnographic research conducted in a manufacturing organization, we introduce the concept of pragmatic resistance as a means to grasp the everyday resistance that emerges through and reflects cracks in the rational model of organizations. Rather than being anti-work, we demonstrate how pragmatic resistance is bound up with organizational disorder/irrationality, competing work demands and the prioritization of what is interpreted as ‘real work’. Overall, the concept of pragmatic resistance indicates that resistance may be far more pervasive and organizations more fragile and vulnerable to disruption than is often assumed to be the case.
From job crafting to home crafting: A daily diary study among six European countries
Authors: Demerouti Evangelia , Hewett Rebecca , Haun Verena , De Gieter Sara , Rodríguez-Sánchez Alma , Skakon Janne
Published: May 2019

The actions that individuals take to proactively craft their jobs are important to help create more meaningful and personally enriching work experiences. But do these proactive behaviors have implications beyond working life? Inspired by the suggestion that individuals aim for a meaningful life we examine whether on days when individuals craft their jobs, they are more likely to craft non-work activities. It also seems likely that characteristics of the home environment moderate these cross-domain relationships. We suggest that crafting crosses domains particularly when individuals gain resources through high autonomy and high workload at home. We partly supported our model through a daily diary study, in which 139 service sector employees from six European countries (Belgium, Denmark, Germany, Netherlands, Spain, UK) reported their experiences twice a day for five consecutive workdays. Home autonomy and home workload strengthened the positive relationship between seeking resources at work and at home. Moreover, home autonomy strengthened the positive association between seeking challenges at work and at home, and the negative relation between reducing demands at work and at home. These findings suggest that the beneficial implications of job crafting transcend life boundaries thereby providing advice for how individuals can experience greater meaning in their lives.
Studying delamination in composite laminates using shell elements and a strain-rate-dependent micro-mechanical model
Authors: Medikonda Sandeep , Tabiei Ala
Published: May 2019

The effectiveness of studying inter-laminar delamination in laminated composites with the help of thickness-stretch shell elements which utilize a 3-D material model sub-routine as compared to the traditional plane-stress shell elements has been investigated using a non-linear finite element solver (LS-DYNA®). A strain-rate-dependent micro-mechanical material model using ply-level progressive failure criteria has been used to simulate the initiation and propagation of delamination. A methodology of assigning physical significance to the choice of damage parameters has been presented. The numerical delamination growth has been qualitatively analyzed against the experimental C-scan images for multiple impact events on different composite plates.
Coeliac crisis mimicking nephrotic syndrome in a post-partum patient
Authors: Helvacı Özant , Yıldız Seyma , Korucu Berfu , Derici Ulver , Arinsoy Turgay
Published: May 2019

Background

Coeliac crisis is a life-threatening presentation of coeliac disease. Severe diarrhoea, weight loss, electrolyte imbalances and malnutrition are prominent features. Although mainly a disease of childhood, it can on the rare occasion be diagnosed in adults.

Case presentation

A 25-year-old female with severe generalised oedema, lower extremity weakness, hypokalemia and profound hypoalbuminemia was referred with an initial diagnosis of nephrotic syndrome. Three months previously she had given birth to a healthy child following an uneventful pregnancy. She did not have proteinuria. She had a history of diarrhoea with gluten-containing food since childhood but lacked a formal diagnosis of coeliac disease. A duodenal biopsy confirmed the suspected diagnosis. Coeliac crisis was diagnosed with life-threatening multisystem involvement. Introduction of a gluten-free diet abolished all disease symptoms and ameliorated laboratory parameters at six months’ follow-up.

Conclusion

Coeliac crisis is a rare, yet dangerous presentation of coeliac disease in adults. As this case suggests, it can present with generalised oedema and hypoalbuminemia mimicking nephrotic syndrome. Rapid diagnosis is the key to successful treatment.
Kisses of Death in the Psychology Faculty Hiring Process
Authors: Boysen Guy A. , Morton Jordan , Nieves Tatiana
Published: May 2019

Competition for full-time psychology faculty positions is intense, and some behaviors and types of information could lead to the rejection of even highly qualified candidates; the current research explored these so-called kisses of death in the hiring process. Qualitative analysis of faculty reports of kisses of death in Study 1 ( N = 155) produced seven categories: lack of collegiality, questionable qualifications, lack of professional polish, poor preparation, lack of fit, poorly constructed materials, and lack of enthusiasm. Study 2 ( N = 297) explored the severity of kisses of death. Ratings of the severity of lack of collegiality, professionalism, preparation, and enthusiasm were similar across baccalaureate, master’s, and doctoral institutions, but teaching- and research-related kisses of death showed significant differences. The results suggest that, in addition to building basic qualifications, aspiring faculty should be aware of the skills and strategies that will allow them to avoid kisses of death in the hiring process.
The Impact of Upper Airway Stimulation on Swallowing Function
Authors: Huntley Colin , Vasconcellos Adam , Mullen Michael , Chou David W. , Geosits Haley , Doghramji Karl , Boon Maurits
Published: May 2019

Objective:

To evaluate the impact of upper airway stimulation therapy (UAS) on swallowing function in patients with obstructive sleep apnea.

Study Design:

Prospective cohort study.

Setting:

Academic medical center.

Participants and Outcome Measures:

We recorded demographic, preoperative polysomnogram (PSG), operative, and postoperative PSG data. We assessed the patients swallowing function using the Eating Assessment Tool (EAT-10) dysphagia questionnaire. This was administered both pre- and postoperatively. The postoperative EAT-10 survey was administered at least 3 months after UAS implantation.

Results:

During the study period, 27 patients underwent UAS implantation, completed the pre- and postoperative EAT-10 questionnaire, met inclusion/exclusion criteria, and were included in the study. The cohort consisted of 16 men and 11 women with a mean age of 63.63 years. The mean preoperative BMI, Epworth Sleepiness Scale (ESS), and Apnea Hypopnea Index (AHI) were 29.37, 10.33, and 34.90, respectively. The mean postoperative ESS and AHI were 5.25 and 7.59, respectively. These were both significantly lower than the preoperative values ( P = .026 and P < .001). The mean pre- and postoperative EAT-10 scores were 0.37 and 0.22, respectively ( P = .461).

Conclusion:

Our data suggest that UAS likely does not lead to postoperative dysphagia.
Development consensus in the Internet context: penetration, freedom, and participation in 38 countries
Authors: Lu Jia , Luo Chen
Published: May 2019

The decline of public consensus is often linked to the rise of the Internet. Conceptualizing the Internet as a context, this paper explores its impacts on public consensus on development. The data of the World Values Survey were used for multilevel analyses with 58,926 respondents in 38 countries. It reported three counterbalances. First, Internet penetration weakens public consensus on development, but promotes the individual use of the Internet, which strengthens public consensus on development. Second, Internet freedom and Internet participation contribute to a robust online democracy, which buffers the informational impact of Internet penetration. Third, public consensus on development is nurtured in a context where Internet freedom serves as an instrument to protect an open, free public sphere, but is fragmented by a country’s overall ideological orientation towards freedom.