bluuebunny/crossref_metadata_2025 huggingface dataset:
Vivências de si no interior do cotidiano: o caso de uma crônica jornalística brasileira
Authors: Moraes Carla Roselma Athayde
Published: December 2018

Neste trabalho, buscamos delinear, no gênero discursivo-textual crônica jornalística, a forma como se manifesta, linguística e discursivamente, um de seus grandes componentes, o discurso introspectivo, dentro de sua grande temática, que é o cotidiano das pessoas nas cidades. Para atingir o nosso intento, estabeleceremos algumas reflexões teóricas de pensadores comprometidos com as relações sociais entre os homens pela via da linguagem, do discurso e tentaremos aplicar e demonstrar a pertinência dessas reflexões num breve estudo de uma crônica do escritor Carlos Heitor Cony.
Um olhar discursivo sobre o processo de subjetivação do indígena em dispositivo didático
Authors: Moreira Icléia Caires , Guerra Vânia Maria Lescano
Published: December 2018

A partir de um olhar discursivo-desconstrutivo sobre o Guia Didático “Cineastas Indígenas para Jovens e Crianças”, este artigo problematiza os efeitos de sentido de in-exclusão dos sujeitos indígenas das etnias Wjãpi, Ikpeng, Panará, Ashaninka, Mbya-guarani e Kisêdjê, que emergem desse texto produzido pela OnG “Vídeos nas Aldeias” e publicizado no ciberespaço. Pautamo-nos, transdisciplinarmente, na Análise do Discurso de origem francesa (PÊCHEUX, 1988), na arqueogenealogia foucaultiana (2014) e no pós-colonialismo (CASTRO-GÓMES, 2005; BHABHA, 2013). Nossa hipótese é a de que a representação identitária desses indígenas ocorre via discurso da sociedade hegemônica (branco), como um processo de subjetivação/identificação dos indígenas. Reflexões iniciais apontam que o discurso subjetiva esses sujeitos (re)legando-lhes ao entre-lugar da in/exclusão e da construção estereotipada de suas identidades na contemporaneidade.
Supervisor Workplace Gossip and Employee Job Performance
Authors: Dlamani Phakamani , Zhou Iris , Kwamboka Juniter
Published: December 2018

This paper examined the role of supervisor gossip on subordinate job performance. The paper hypothesized that supervisor’s negative and positive gossip influence employee job engagement which in subsequently affects employee job performance. Dyadic research design was used to collect data from a sample of 228 employees and supervisors from Kwa Zulu Natal Government Municipality, South Africa. The employees completed the questionnaire items on supervisor gossip and job engagement, while their supervisors completed the questionnaire items on employee job performance. Data collection was done in three waves.  The study established that positive superior gossip positively and significantly influenced employee job engagement, which positively improved employee job performance; while negative superior gossip had a positive, but insignificant effect on employee job engagement.  The study was limited by the multicultural nature of the municipality as well as the causality issues and common method biases associated with research design. Having managed to utilize Social Exchange Theory (SET) in disentangling the supervisor-subordinate reciprocal communication web, the study proposes that supervisors should inculcate effective strategies of utilizing both positive and negative gossip in the workplace so as to increase positive employee outcomes. Negative gossip will cause tension, stress and mistrust among employees, while positive gossip will lead to creation of workplace antagonism and competition. This study attempted to assess the implication of supervisor gossip on employee job engagement and performance in the public service sector, whose employees are characterized with high job security as compared to their peers in the private sector.
A COMPLEX CASE OF DIFFERENTIAL DIAGNOSIS OF PULMONARY TUBERCULOSIS AND A NEUROENDOCRINE TUMOR
Authors: Karpina N. L. , Lepekha L. N. , Amansakhedov R. B. , Gordeeva O. M. , Dudchenko A. V. , Ergeshov A. E.
Published: December 2018

Pathomorphosis of tuberculosis and other lung diseases that have a similar clinical radiological and morphological picture leads to considerable difficulties and mistakes in the differential diagnosis of pulmonary processes. In particular, there are difficulties in the differential diagnosis of neuroendocrine lung tumors (NET) and pulmonary tuberculosis.

A clinical case of timely diagnosis of a neuroendocrine tumor in a young female patient without clinical symptoms typical for NETs has been described. The main manifestations revealed by chest CT scanning were single focal consolidations. The diagnosis was confirmed by histological studies of surgery samples.
Two-Step Contractions of Inverted Repeat Region and Psai Gene Duplication from the Plastome of Croton Tiglium (Euphorbiaceae)
Authors: Jo Sangjin , Kim Ki-Joong
Published: December 2018

Croton L. (Euphorbiaceae) is a very specious genus and consists of about 1,250 species, mainly distributed in tropical Asia and China. The first complete plastome sequence from the genus, Croton tiglium, is reported in this study (NCBI acc. No. MH394334). The plastome is 150,021 bp in length. The lengths of LSC and SSC are 111,654 bp and 18,167 bp, respectively. However, the length of the IR region is only 10,100 bp and includes only four rrn and four trn genes, and a small part of the ycf1 gene. We propose two-step IR contractions to explain this unique IR region of the C. tiglium plastome. First, the IR contracted from rps19-rpl2 to ycf2-trnL-CAA on the LSC/IRb boundary. Second, the IR contracted from ycf2-trnL-CAA to rrn16-trnV-GAC on the LSC/IRa boundary. In addition, duplicated copies of psaI genes were discovered in the C. tiglium plastome. Both copies were located side by side between accD and ycf4 genes, but one copy was pseudogenized because of a five-basepair (TAGCT) insertion in the middle of the gene following frameshift mutation. The plastome contains 112 genes, of which 78 are protein-coding genes, 30 are tRNA genes, and four are rRNA genes. Sixteen genes contain one intron and two genes have two introns. The infA gene is lost. Twelve large repeats were detected in the plastome. All large repeats are located in the LSC region. Also, 272 simple sequence repeats (SSRs) were identified. The penta-SSRs accounted for 45% of total SSRs, followed by mono- (32%), di- (12%), tetra (6%) and tri-SSRs (5%). Most of them were distributed in the large single copy (LSC) region (85%). In addition, 76% of the SSRs were located in the intergenic spacer (IGS). Phylogenetic analysis suggested that C. tiglium is a sister group of Jatropha curcas with 100% bootstrap support. Seven Euphorbiaceae species formed one clade with 100% bootstrap support.
Smart Process Optimization and Adaptive Execution with Semantic Services in Cloud Manufacturing ‡
Authors: Mazzola Luca , Waibel Philipp , Kaphanke Patrick , Klusch Matthias
Published: December 2018

A new requirement for the manufacturing companies in Industry 4.0 is to be flexible with respect to changes in demands, requiring them to react rapidly and efficiently on the production capacities. Together with the trend to use Service-Oriented Architectures (SOA), this requirement induces a need for agile collaboration among supply chain partners, but also between different divisions or branches of the same company. In order to address this collaboration challenge, we~propose a novel pragmatic approach for the process analysis, implementation and execution. This~is achieved through sets of semantic annotations of business process models encoded into BPMN 2.0 extensions. Building blocks for such manufacturing processes are the individual available services, which are also semantically annotated according to the Everything-as-a-Service (XaaS) principles and stored into a common marketplace. The optimization of such manufacturing processes combines pattern-based semantic composition of services with their non-functional aspects. This is achieved by means of Quality-of-Service (QoS)-based Constraint Optimization Problem (COP) solving, resulting in an automatic implementation of service-based manufacturing processes. The produced solution is mapped back to the BPMN 2.0 standard formalism by means of the introduced extension elements, fully detailing the enactable optimal process service plan produced. This approach allows enacting a process instance, using just-in-time service leasing, allocation of resources and dynamic replanning in the case of failures. This proposition provides the best compromise between external visibility, control and flexibility. In this way, it provides an optimal approach for business process models' implementation, with a full service-oriented taste, by implementing user-defined QoS metrics, just-in-time execution and basic dynamic repairing capabilities. This paper presents the described approach and the technical architecture and depicts one initial industrial application in the manufacturing domain of aluminum forging for bicycle hull body forming, where the advantages stemming from the main capabilities of this approach are sketched.
Explaining and Measuring Social-Ecological Pathways: The Case of Global Changes and Water Security
Authors: Bolognesi Thomas , Gerlak Andrea K. , Giuliani Gregory
Published: December 2018

The Social-Ecological Systems (SES) framework serves as a valuable framework to explore and understand social and ecological interactions, and pathways in water governance. Yet, it lacks a robust understanding of change. We argue an analytical and methodological approach to engaging global changes in SES is critical to strengthening the scope and relevance of the SES framework. Relying on SES and resilience thinking, we propose an institutional and cognitive model of change that institutions and natural resources systems co-evolve to provide a dynamic understanding of SES that stands on three causal mechanisms: institutional complexity trap, rigidity trap, and learning processes. We illustrate how Data Cube technology could overcome current limitations and offer reliable avenues to test hypothesis about the dynamics of social-ecological systems and water security by offering to combine spatial and time data with no major technical requirements for users.
Deep Reinforcement Learning for Soft Robotic Applications: Brief Overview with Impending Challenges
Authors: Bhagat Sarthak , Banerjee Hritwick , Ren Hongliang
Published: December 2018

The increasing trend of studying the innate softness of robotic structures and amalgamating it with the benefits of the extensive developments in the field of embodied intelligence has led to sprouting of a relatively new yet extremely rewarding sphere of technology. The fusion of current deep reinforcement algorithms with physical advantages of a soft bio-inspired structure certainly directs us to a fruitful prospect of designing completely self-sufficient agents that are capable of learning from observations collected from their environment to achieve a task they have been assigned. For soft robotics structure possessing countless degrees of freedom, it is often not easy (something not even possible) to formulate mathematical constraints necessary for training a deep reinforcement learning (DRL) agent for the task in hand, hence, we resolve to imitation learning techniques due to ease of manually performing such tasks like manipulation that could be comfortably mimicked by our agent. Deploying current imitation learning algorithms on soft robotic systems have been observed to provide satisfactory results but there are still challenges in doing so. This review article thus posits an overview of various such algorithms along with instances of them being applied to real world scenarios and yielding state-of-the-art results followed by brief descriptions on various pristine branches of DRL research that may be centers of future research in this field of interest.
Characterization of Carotenoid and Carotenoid Esters of Astringent Persimmon Tissues (Diospyros kaki Thunb. var. Rojo Brillante). Effects of Thermal and High Pressure Non-Thermal Processing
Authors: Cano M. Pilar , Gómez-Maqueo Andrea , Welti-Chanes Jorge , García-Cayuela Tomás
Published: December 2018

Carotenoid and carotenoid esters profiles of peel, pulp and whole fruit tissues of astringent persimmon (Diospyrus kaki Thunb., var. Rojo Brillante) have been characterized in detail and quantified for the first time. Carotenoids were determined by HPLC-PDA-MS/MS (APCI+), using a reverse phase C30 column. A total of 38 carotenoids were identified and quantified, corresponding to 21 free carotenoids (13 xanthophylls and 8 hydrocarbon carotenes) and a total of 17 carotenoid esters. The qualitative profiles are very similar among tissues, differing only in the carotenoids concentration. The most important identified free xanthophylls were (all-E)-β-cryptoxanthin, (all-E)-antheraxanthin, (all-E)-lutein, (all-E)-zeaxanthin and (all-E)-violaxanthin . Hydrocarbon carotenoids found were (all-E)-β-carotene, (all-E)-α-carotene, (9Z)-β-carotene, (13Z)-β-carotene, (9Z)-α-carotene, and lycopene. The most abundant carotenoid esters were (all-E)-lutein-3-O-palmitate, (all-E)-zeaxanthin myristate, (all-E)-zeaxanthin palmitate and (all-E)-cryptoxanthin laurate. Processing by high pressures produced no regular effect on persimmon carotenoids and pasteurization affected negatively the content of all carotenoids from all studied persimmon tissues. This work will contribute to the development of scientific research about the bioaccessibity and bioavailabity of each individual free or esterified persimmon carotenoids in order to a better understanding of the carotenoid compounds impact in human health.
 On the Performance of Garch Family Models in the Presence of Additive Outliers
Authors: Adenomon Monday Osagie , Emenogu Ngozi G. , Obinna Nweze Nwaze
Published: December 2018

It is a common practice to detect outliers in a financial time series in order to avoid the adverse effect of additive outliers. This paper investigated the performance of GARCH family models (sGARCH; gjrGARCH; iGARCH; TGARCH and NGARCH) in the presence of different sizes of outliers (small, medium and large) for different time series lengths (250, 500, 750, 1000, 1250 and 1500)  using root mean square error (RMSE) and mean absolute error (MAE) to adjudge the models. In a simulation iteration of 1000 times in R environment using rugarch package, results revealed that for small size of outliers, irrespective of the length of time series, iGARCH dominated, for medium size of outliers, it was sGARCH and gjrGARCH that dominated irrespective of time series length, while for large size of outliers, irrespective of time series length, gjrGARCH dominated. The study further leveled that in the presence of additive outliers on time series analysis, both RMSE and MAE increased as the time series length increased.
Spatial Variability of Soil Properties under Different Land Use in the Dang District of Nepal
Authors: Panday Dinesh , Ojha Roshan Babu , Chalise Devraj , Das Saurav , Twanabasu Bikesh
Published: December 2018

A study was carried out in the eastern part of Dang district in Nepal to assess the variability of selected soil properties due to different land use and map their spatial distribution. Considering three land use types (agriculture, agroforestry, and grassland), a total of 120 samples were collected from surface soil (0 to 15 cm depth) in May 2015 and analyzed for soil fertility parameters: pH, organic matter (OM), nitrogen (N), phosphorus (P), potassium (K), boron (B), and zinc (Zn). Results revealed that the average value of soil pH significantly (P<0.05) varied from 7.05 in agroforestry to 7.53 in agriculture land use. Soil OM and N contents were medium in range in all land use with slight variation, the highest average OM and N found in grassland (2.87% and 0.14% respectively), followed by agriculture (2.64% and 0.13% respectively), and agroforestry (2.45% and 0.12% respectively). Further, the results showed significant variation for P among agroforestry (18.99 kg ha-1) and grassland (8.49 kg ha-1) while the K content was the highest for grassland (144 mg kg-1) and lowest for agriculture (120 mg kg-1). Micronutrients- B was low (0.28 to 0.35 mg kg-1) and Zn was very low (0.14 mg kg-1) in all land use. There is a need to add appropriate fertilizer N, P, B, and Zn to the soil in order to increase the fertility status under different land use. Spatial variability maps for soil chemical properties can be used by farmers and local planners to make effective soil management strategies.
MiR-125b-2 Knockout in Testis Are Associated with Targeting to PAP Gene, Mitochondrial Copy Number and Impaired Sperm Quality
Authors: Li Longlong , Zhu Yanling , Sun Jiajie , Chen Ting , Luo Junyi , Shu Gang , Wang Songbo , Zhu Xiaotong , Jiang Qingyan , Zhang Yongliang , Xi Qianyun
Published: December 2018

microRNAs can cause male infertility by impacting sperm quality and impaired spermatogenesis. Since the miR-125 family plays an important role in regulating embryo development, but the function of miR-125b-2 in male reproduction remains unknown. In this study, we prepared a model of miR-125b knockout (KO) mice. Among the KO mice, the progeny test showed that litter sizes decreased significantly and the rate of non-parous females increased significantly (p<0.05). At the same time, the testosterone concentration increased significantly (p<0.01), with the remarkable decrease for estradiol (p<0.05). Moreover, sperm count decreased obviously (p<0.05) and the percentage of abnormal sperms increased significantly (p<0.01). Testicular transcriptome sequencing demonstrated that there were 173 up-regulated genes, including Papolb (PAP), and 151 down-regulated genes in KO mice compared with wild type (WT). KEGG and GO analysis showed many of these genes were involved in sperm mitochondrial metabolism and other cellular biological processes. Meanwhile, the sperm mitochondria DNA (mtDNA) copy number was increased significantly (p<0.01) in KO mice, but the integrity of mtDNA and nuclear DNA (nDNA) had no change. In the top 10 up-regulated genes, as a testis specific expressing gene, PAP can affect the process of spermatogenesis. Western blotting and Luciferase Assay validated that PAP was the target of miR-125b-5p. Intriguingly, we also found that both miR-125b and PAP were only highly expressed in germ cells (GC) instead of Leydig cells (LC) and Sertoli cells (SC), and miR-125b-5p could target PAP to regulate TM3 cell secretion of testosterone (p<0.05). Our study firstly demonstrated that miR-125b-2 could regulate testosterone secretion by directly targeting PAP and increase sperm mtDNA copy number to affect semen quality. The study indicated that miR-125b-2 had a positive influence on the reproductive performance of animal and could be a potential therapeutic target for male infertility.
Phase Angle Associated with Over-Hydration in Healthy Chinese
Authors: Chai Yuanmin , Jing Li , Xiuli Sun , Zhenkun Lei , Lirong Zhang , Guocun Hou
Published: December 2018

Background A body composition monitor (BCM) has a role not only in determining over-hydration (OH) but also as an aid to nutritional assessment. For dialysis patient-specific clinical applications of BCM, it is necessary to clarify the relationship between body composition parameters and OH in healthy Chinese individuals. Methods This cross-sectional study involved 314 healthy individuals with a mean age of 45.7±13.1 years. BCM measurements were performed while the subjects were fasting. Results The mean OH level was 0.379±0.81 L. Lean tissue index (LTI) and Lean tissue mass (LTM) were significantly higher in males (p<0.001), while fat tissue index (FTI) was significantly higher in females (p<0.001). In univariate correlation analysis, FTI, Fat, and ATM had a negative correlation with OH in females and all subjects (p<0.05), while LTM and BCM had a positive correlation in all subjects (p<0.05). There was a significant negative correlation between phase angle (PhA) and OH in males, females, and all subjects (r=-0.634, p<0.001; r=-0.666, p<0.001; r=-0.484, p<0.001, respectively). In multivariate linear regression analysis, PhA (b=-1.266, p<0.001), LTM (b=0.987, p<0.001), age (b=-0.307, p<0.001) were independent predictors of OH. Conclusions  This study demonstrated that age, LTM and especially PhA, had important roles in predicting OH in healthy Chinese individuals. In the future, PhA may aid in clinical assessment by helping to titrate dry weight among hemodialysis patients with malnutrition.
A Reversible Protonic Ceramic Cell with Symmetrically Designed Pr2NiO4+δ-Based Electrodes: Fabrication and Electrochemical Features
Authors: Tarutin Artem , Lyagaeva Julia , Farlenkov Andrey , Plaksin Sergey , Vdovin Gennady , Demin Anatoly , Medvedev Dmitry
Published: December 2018

Reversible protonic ceramic cells (rPCCs) combine two different operation regimes, fuel and electrolysis modes, which allow reversible chemical-to-electrical energy conversion at reduced temperatures with high efficiency and performance. Here we present novel technological and materials science approaches, enabling a rPCC with symmetrical functional electrodes to be prepared using a single sintering step. The response of the cell fabricated on the basis of P–N–BCZD|BCZD|PBN–BCZD (where BCZD = BaCe0.5Zr0.3Dy0.2O3–δ, PBN = Pr1.9Ba0.1NiO4+δ, P = Pr2O3, N = Ni) is studied at different temperatures and water vapor partial pressures by means of volt-ampere measurements, electrochemical impedance spectroscopy and distribution of relaxation times analyses. The obtained results demonstrate that symmetrical electrodes exhibit classical mixed-ionic/electronic conducting behavior with no hydration capability at 750 °C; therefore, increasing the pH2O values in both reducing and oxidizing atmospheres leads to some deterioration of their electrochemical activity. At the same time, the electrolytic properties of the BCZD membrane are improved, positively affecting the rPCC’s efficiency. The electrolysis mode of the rPCC is found to be more efficient than the fuel cell mode under highly humidified atmospheres, since its performance is determined by the ohmic resistance, which decreases under respectively less humid conditions.
Laboratory Surrogate Markers of Residual HIV Replication among Distinct Groups of Individuals under Antiretroviral Therapy
Authors: Giron Leila , Tenore Simone , Janini Mario , Sucupira Cecilia , Diaz Ricardo
Published: December 2018

Background: The presence of HIV residual replication markers was investigated among distinct subgroups of individuals on antiretroviral treatment (ART). Methods: One hundred sixteen patients were distributed into 5 treatment groups: first-line suppressive ART with a non-nucleoside analog reverse-transcriptase inhibitor (NNRTI) (n = 26), first-line suppressive ART with boosted protease inhibitors (PI-r) (n = 25), suppressive salvage therapy using PI-r (n = 27), suppressive salvage therapy with PI-r and raltegravir (n = 22) and virologic failure (n = 16). Episomal and total DNA quantitation was evaluated. HIV antibody and LPS quantitation was performed. Results: Episomal DNA was positive in 26% to 38% of individuals under suppressive ART, and it was higher among ART virologic failure group (p = 0.04). HIV proviral load was higher among patients with detectable episomal DNA (p = 0.01). Individuals receiving initial PI-r treatment presented lower HIV antibody (p = 0.027) and LPS (p = 0.029) levels than individuals receiving NNRTI. There was a negative correlation between episomal DNA quantitation and the duration of suppressive ART (p = 0.04), CD4+ T-cell count (p = 0.08), and CD8+ T-cell count (p = 0.07). Conclusions: Residual HIV replication has been inferred among individuals under suppressive ART according to episomal DNA detection. Residual replication may decrease with longer periods of suppressive ART and higher levels of CD4+ and CD8+ T cells. The relationship between episomal DNA and total DNA suggests there is a replenishment of the proviral reservoir. Lower antibody and LPS levels among patients with initial PI-r ART suggest these regimens may more effectively suppress HIV, more effectively decreasing HIV antigenic component.
Influence of Different Instrument Carrying Systems on the Kinematics of the Spine of Saxophonists
Authors: Piatek Stephanie , Hartmann Jürgen , Günther Petra , Adolf Daniela , Seidel Egbert J
Published: December 2018

AIMS: Back strain is a common musculoskeletal complaint affecting musicians, which may be related to unsuitable playing positions causing fatigue and muscle tension. In this study, three saxophone-carrying systems (neck-strap, shoulder-strap, and Saxholder) were examined for their effects
on spinal column kinematics. METHODS: The influence of saxophone-carrying systems was investigated in 14 physically healthy alto saxophonists using ultrasound topometry. Additional tests were performed on 1 subject to examine the influence of the different weights of alto, tenor, and baritone
saxophones with the three different carrying systems. RESULTS: The clearest difference between two systems (shoulder-strap vs Saxholder) was found in the angle at which the player’s head bows forward while playing (3.35°; 95% CI 0.44, 6.26; p=0.0272). The use of the Saxholder resulted
in a physiologically favorable axial position of the head. The head posture to ankle distance showed that the shoulder-strap and Saxholder, compared to the neck-strap, allowed a sagittal straightening and therefore advantageous axially balanced body position, although the differences were
not statistically significant. The Saxholder also enabled a stabilization in the frontal section of the shoulders. In additional tests on 1 subject, the coefficient of variation showed that the instruments’ weights had a larger influence on the physiologically favorable balanced body
position than the different carrying systems. CONCLUSION: This pilot study was able to show that the technique of sonometric examination (Zebris) is an effective way to investigate the influence of instrument-carrying systems on the kinematics of the spine. The Saxholder may be physiologically
advantageous, but further research with a larger sample is needed to verify the findings.
Indian railway track analysis for displacement and vibration pattern estimation
Authors: Mohanta M. , Setu Gyan , Ranjan V. , Srivastava J. P. , Sarkar P. K.
Published: December 2018

This paper presents the dynamic response of the Indian Railway track. Two track models are considered for the dynamic response in terms of vertical displacement and acceleration at different wheel speeds, keeping the moving point load at constant magnitude. The rail is treated as a beam either on viscoelastic foundation or on the discrete elastic support system. The governing equation is implemented in finite element analysis using ANSYS 14.0. For the validation of result from system equation are compared with those available in published literature and the maximum deviation for displacement at the midpoint of rail is found to be within 5 %. Different wheel speed generates variation in displacement and acceleration of the rail track. The study can be viewed as the foundation for the comparison of FEA based simulation of rail track to specify its dynamic response useful to provide better safety and comfort to commuters.
An investigation and study of the effect of configuration of the layers on the acoustic characteristics of nonwoven panels
Authors: Mirjalili Seyed Abbas
Published: December 2018

To eliminate or reduce the sound in the buildings, sound insulators are used. In designing the buildings two points should be considered. The absorption and transfer of the sound are as the key points in this connection. Therefore, we should the materials in the buildings which are able to meet our needs to reduce sound pollution. These materials would absorb the sound and reduce it getting into the building. These materials are known as acoustic materials. The nonwovens are one of the most important acoustic materials. This paper reports the effect of different configurations of layers placed in the panels on their NAC.
Numerical analysis of vibration-isolating effect of vibration-isolating slot under buried pipe subjected to millisecond blasting
Authors: Ji Chong , Gao Fuyin , Li Xinghua , Yu Yang , Cheng Liangyu
Published: December 2018

Research on vibration-isolating effects of vibration-isolating slot on buried pipe can be done by numerical method, without being disturbed by external environmental factors. It has measured data without relatively high experiment cost and analyzed the influence of some key parameters according to the results of numerical simulation. The results show that the vibration speed of the pipeline with vibration-isolating slot tends to have a larger decrease than those without vibration-isolating slot. What’s more, the homogeneous explosive charge is discrepant in different working conditions, but the vibration-isolating ratio is similar in the vibration-isolating slot with same structure parameter. The millisecond blasting is hardly affected by total explosive charge. But the blasting seismic intensity is influenced by explosive charge in each stage directly.
Numerical simulation on fracture mechanics behavior of high-pressure gas pipeline
Authors: Gao Fuyin , Ji Chong , Yu Yang , Cheng Liangyu , Liu Ying
Published: December 2018

The numerical simulation could help to understand the fracture mechanics behavior of high-pressure gas pipeline. The calculation results show that the internal high pressure of gas provides a driving force for crack propagation and tube wall deformation when the pipeline cracks and expands. Therefore, the rapid crack propagation tends to occur when the steel pipe is driven by high-pressure gas. In the process of steel pipe crack extension, immense internal high-pressure gas spewed from rupture and expand rapidly, compressing the air to form a series of compression wave which propagate rapidly and superpose together to form a shock wave eventually. Because the explosive wave of the pipe rupture has a high directivity, the energy distribution of gas is not uniform during the releasing process. What’s more, in pipe blasting, the longer distance, the more the surface vibration velocity decreases. In the vicinity of explosion source, the decreasing trend of the peak vibration velocity is significant. The vertical vibration velocity at the same point is larger than the longitudinal and tangential vibration speed.
Deviation analysis of rotational inertia measurement based on torsion bar method
Authors: Zhang Xin Ming , Wang De Min , Li Jun Ye , Shang Chun Min , Xiong Jia Xin , Xie Hong Cai
Published: December 2018

The test of moment of inertia has a wide range of applications in aerospace, vehicle engineering, precision machinery, motors and other fields, moment of inertia directly affects the reliability and performance of components or equipment, it is very essential to test the moment of inertia. By analyzing the principle of moment of inertia test, we could come to the conclusion that the theoretical value, the inertia of the disk, the period of the torsion swing of the standard body and the period of the empty disk of the moment of inertia and the moment of inertia of the standard body. By analyzing the measurement error, position error and damping during the test, we could reach the following conclusion that the test accuracy of the moment of inertia can reach 0.1 %.
A new method calculating load balance of sliding bearing by using neural network PID algorithm
Authors: Wei Wei , Guo Wenyong , Han Jianggui , Wu Xinyue
Published: December 2018

Aiming at low efficiency of existing sliding bearing load balance calculation, a new method that based on neural network proportional-integral-derivative (PID) algorithm is proposed for the first time, in which a compound control algorithm combining neural network and PID algorithm is applied. In this new method, the load error is taken as the input of the system, and the eccentricity of the bearing is used as the input of the controller, and the output of the system is the oil film force of the bearing. Comparing with traditional method, calculation results show that: the number of iterations calculated by neural network PID algorithm is less than traditional one and has higher efficiency and stronger adaptability under different loads.
Dynamic responses of non-ballast track structures subjected to high-speed train loads at the welded rail joint
Authors: Ouyang Jun , Wang Peng , Liu Zhixin
Published: December 2018

This paper presents a numerical study on the dynamic responses of the non-ballast track structures under the high-speed train load that is excited by the rail irregularity at the welded rail joint. In this study, a multi-body dynamics model with 10 degrees of freedom is built to model a high-speed vehicle and a finite element model is established to simulate the non-ballast track. A mathematical model is also given to characterize the geometry of the local rail irregularity at the welded rail joint. By coupling the high-speed vehicle model and the track model and taking the mathematical model of the welded rail joint as an input, the dynamic responses of the non-ballast track structures under a rail vehicle running at a high speed are simulated and discussed in this paper. The wheel/rail force and the rail and slab vibration acceleration are investigated to demonstrate the significant dynamic effects on the track structures due to the welded rail joint.
The vibration health risk assessment on operators of different capacity dumpers at opencast mine in India
Authors: Kaviraj R. , Kumaraswamidhas L. A.
Published: December 2018

In a labour intensive sector, some of the factors in the work environment which impact the health of vehicle operators include: Whole-Body Vibration (WBV) and Hand-Arm Vibration (HAV). The vibrations transferred from the dumpers are harmful to the operators; hence a study was carried out to measure the vibration from dumpers and its effect on operators in Indian opencast mines. Dumper is a vehicle designed to transport bulk material and used extensively in the construction and mining industries. For the measurement, dumpers with the different capacities were selected from the opencast mines. Vibration measurements were carried out in accordance with ISO 5349-1 for the measurement of HAV and ISO 2631-1 for the measurement of WBV. The obtained WBV exposure result shows that the problem of musculoskeletal disorder was significantly higher with respect to VDV(8) (69 %) in the exposed population as compared to A(8) r.m.s. acceleration (46 %). Moreover different capacity dumper vehicle hand transmitted vibration through steering wheel, A(8) r.m.s. acceleration observed in the range of 1.91 m/s2-4.28 m/s2. As per EU DIRECTIVE 2002/44/EC, specified Exposure Action Value (EAV) 71 % measured A(8) value falls within EAV limit. However, despite of the result operator experience problem of hand arm vibration syndrome. Hence there is a need of ergonometric deign enhancement on dumpers vehicle’s seat and steering wheel.
Vibration performances of MRE embedded sandwich beam: experimental study
Authors: Nayak Biswajit , Das Raj Kishor , Gautam Satyam Shivam
Published: December 2018

In this paper, magnetorheological elastomer (MRE) is fabricated with carbonyl iron particle mixed with silicon rubber as the matrix. Sandwiched beam is fabricated from the MRE sandwiched between two aluminum layers. Forced vibrations of the MRE cored sandwiched beam have been studied. An experimental set up is fabricated to investigate the vibration responses of MRE cored sandwich beam with and without magnetic field. The obtained experimental results reveal that the natural frequencies and damping ratios of the MRE cored sandwiched beams are significantly influenced by MRE and magnetic field. The stiffness and damping properties of the beam change due to the change in rheological properties of the MRE under the magnetic field.
The study on magnetism and solid coupling vibration and its electromagnetic force characteristics in stator system of electrical machine
Authors: Bai-zhou Li , Jian-xin Han , Xiaohua Tan , Qiu Li
Published: December 2018

The air-gap electromagnetic force is not the unique excitation which excites magnetism and solid coupling vibration on stator system of asynchronous machine. Besides, there should be a ponderomotive force as an internal electromagnetic excitation in stator core. Therefore, the magnetism and solid coupling vibration equation with both of the forces was obtained for the electromagnetically excited vibration on stator system of electrical machine. Based on Maxwell equations and the electromagnetic constitutive relation, the expressions of the electromagnetic field and force were derived by solving the eddy equation and the boundary conditions. With numerical calculation, the influences of geometric parameters on the electromagnetic field and forces were analyzed. The electromagnetic excitations of magnetism and solid coupling vibration on stator system were improved by the analysis of ponderomotive force in the stator core. Furthermore, the conclusions provide a theoretical basis for the electromagnetic design of asynchronous machine.
Numerical study of shear thickening fluid with distinct particles dispersed in carrier fluid
Authors: Chauhan Vimal , Kumar Ashish , Bhalla Neelanchali Asija , Danish Mohammad , Ranjan Vinayak
Published: December 2018

The Shear Thickening Fluid (STF) is a non- Newtonian fluid which comes under dilatant material, STF undergoes phase transition from a low to high viscosity when shear stress is applied on it. In this paper modelling and simulation tools are used to study the STF fluid interaction when subjected to applied shear stress. The Eulerian description used for the fluid flow and the model considered the Lagrangian description of the rigid particles. The numerical analysis inspects important guideline such as acceleration of the flow, particle dispersion and the base of Non-Newtonian fluid. The fluid particles interrelation of STF showed that the shape, arrangement, volume concentration, and size of the particles had a vital effect on the behavior of STF. By adding sand particles in non-Newtonian fluids and applying high shear strain rates showed improvement in the shear thickening effects.
Modelling and simulation of aerodynamic performance of Vortex generators for hatch back type cars
Authors: Yadav Aanchal , Rawal Pooja , Mishra R. K.
Published: December 2018

A considerable amount is being invested by the vehicle developers in reducing the power needed for propulsion. The vehicle is optimized such to reduce the aerodynamic drag as the drag force is the leading resistance to the motion of vehicle. The flow separation at the rear end of the vehicle is one of the major causes of this drag. This paper investigates the effect of the delta shaped aerodynamic devices, known as vortex generators, installed at the roof of a hatchback type car to delay the flow separation. Mostly vortex generators are used in aircrafts and faster road vehicles with a notch at rear like the sedans. This experiment, unlike the previous researches, investigates and compares the aerodynamic drag and lift of the hatch back vehicle with and without Vortex Generator. Here it is represented that the improvement in aerodynamic drag force reduction, although of very minimal amount, can be achieved by using VGs on hatch back type cars.
Estimation of wear rate in dual phase steel on the basis of the load sharing between constituent phases
Authors: Tyagi Rajnesh , Ranjan Vinayak
Published: December 2018

Model has been for proposed for estimating the wear rate in dual phase (DP) steel for the run-in and the steady state of wear based on estimated load sharing between the constituent phases i.e., ferrite and martensite. The model has been checked by conducting pin-on-disc sliding wear tests on DP steel, Armco (pure) iron and fully martensitic steel (FMS) samples at normal loads of 14.7, 19.6, 24.5, 29.4 and 34.3 N and at a fixed sliding velocity of 1.15 m/s. Armco iron and FMS simulate the constituent phases in DP steel i.e., ferrite and martensite. The wear rates predicted by the proposed model have been found to match well with the experimentally observed wear rates in the regime of lower loads for the steels containing relatively lower volume fraction of martensite. However, wear rates have increasingly larger difference at higher loads. The difference in the estimated and the observed wear rates has been attributed to the flow of the softer phase of ferrite over the hard martensite islands and its relatively higher rate of wear.
Evaluation of the accuracy of two simple methods for microscopic activated sludge analysis
Authors: Sobczyk Mateusz , Pajdak-Stós Agnieszka , Fiałkowska Edyta , Kocerba-Soroka Wioleta , Starzycka-Giża Joanna , Fyda Janusz
Published: December 2018

Biological microscopic analysis is a popular method employed in wastewater treatment plants worldwide for evaluating activated sludge condition. However, many operators still have reservations regarding its reliability. In this study, we evaluated and compared two methods of microscopic sludge investigation: the sludge index (SI) and the Eikelboom–van Buijsen method (EB). We investigated 79 activated sludge samples from nine treatment plants located in southern Poland over a 1-year period. For each sample, sludge volume index values were calculated and compared with the results of evaluation made on the basis of microscopic analysis. Additionally, the effluent quality was analysed in 45 of 79 cases, including investigation of suspended solids, biochemical oxygen demand, chemical oxygen demand, total nitrogen and total phosphorous. The sign test and Wilcoxon matched pairs test showed that a significant difference existed between the two investigated methods. General conclusions from both methods do not provide reliable information concerning nitrogen and phosphorus removal. The EB method had a tendency to be more conservative in its general conclusions than the SI method. Both are highly reliable for estimating activated sludge quality and solid separation properties.
PERCEPÇÃO DOS ENFERMEIROS QUANTO À ASSISTÊNCIA DE ENFERMAGEM NO PROCESSO TRANSFUSIONAL
Authors: Forster Fernanda , Câmara Arilene Lohn , Moraes Cladis Loren Kiefer , Honório Maria Terezinha , De Mattia Daiana , Lazzari Daniele Delacanal
Published: December 2018

Objetivo: conhecer a percepção dos enfermeiros quanto à assistência de enfermagem no processo transfusional. Metodologia: pesquisa qualitativa, exploratória e descritiva, desenvolvida em um hospital geral de grande porte, com a participação de onze enfermeiros. Para interpretação dos dados, utilizou-se a análise de conteúdo. Resultados: emergiram três categorias: o papel do enfermeiro no processo transfusional; assistência de enfermagem na transfusão sanguínea e suas reações; facilidades e dificuldades do enfermeiro no processo transfusional. Conclusão: observou-se que os enfermeiros percebem a importância de sua atuação no processo transfusional, relatam procedimentos indispensáveis à execução do mesmo, a fim de desempenhar com segurança todas as suas atribuições.Descritores: Enfermagem; Transfusão Sanguínea; Assistência de Enfermagem.Perception of nurses regarding nursing care in the transfusion processObjective: to know the perception of nurses regarding nursing care in the transfusion process. Methodology: qualitative, exploratory and descriptive research, developed in a large general hospital, with the participation of eleven nurses. For the interpretation of the data, the content analysis was used. Results: three categories emerged: the role of nurses in the transfusion pro-cess; nursing care in blood transfusion and their reactions; facilities and difficulties in the transfusion process. Conclusion: it was observed that nurses perceive the importance of their performance in the transfusion process, report procedures indispensable to the execution of the same, in order to safely perform all their duties.Descriptors: Nursing; Blood Transfusion; Nursing Care.Percepción de los enfermeros en cuanto a la asistencia de enfermería en el proceso transfusionalObjetivo: conocer la percepción de los enfermeros en cuanto a la asistencia de enfermería en el proceso transfusional. Metodología: investigación cualitativa, exploratoria y descriptiva, desarrollada en un hospital general de gran porte, con la participación de once enfermeros. Para la interpretación de los datos, se utilizó el análisis de contenido. Resultados: surgieron tres categorías: el papel del enfermero en el proceso transfusional; asistencia de enfermería en la transfusión sanguínea y sus reacciones; las facilidades y dificultades del enfermero en el proceso transfusional. Conclusión: se observó que los enfermeros perciben la importancia de su actuación en el proceso transfusional, relatan procedimientos indispensables para la ejecución del mismo, a fin de desempeñar con seguridad todas sus atribuciones.Descriptores: Enfermería; Transfusión Sanguínea; Asistencia de Enfermería.
PROGRAMA DE VOLTA PARA CASA 15 ANOS DE LIBERDADE
Authors: De Humerez Dorisdaia Carvalho
Published: December 2018

A hegemonia das estratégias manicomiais foi sempre questionada em seus aspectos éticos, jurídicos, econômicos, políticos e sociais e a transformação da instituicionalização das pessoas com transtornos mentais se tornou realidade com a reforma psiquiátrica.
Ulisses no carro do sol
Authors: Alves Daniel Vecchio
Published: December 2018

Neste artigo, a epopeia homérica será a fonte escolhida para demonstrar um conjunto de saberes estabelecido anteriormente aos naturalistas jônicos. Em nossa hipótese de leitura, a épica de Homero já apresenta um inicial posicionamento naturalista, a começar pelo fato de suas obras constituírem, a partir da experiência de morte, um elogio à própria vida. E para demonstrar esse jogo de antíteses entre as duas experiências, veremos que, na épica homérica, a presença do relato de viagem tem o propósito de registrar o real exclusivamente apreendido pelos sentidos humanos, mesmo nas cenas mais subjetivas que envolvem lugares infernais e seres lendários. Não afirmaremos tal característica a ponto de transformarmos Homero num empírico, mas trata-se de uma primeira alternativa frente o passado maravilhoso evocado pelos aedos da tradição.
Oxazole-Based Compounds As Anticancer Agents
Authors: Chiacchio Maria A. , Lanza Giuseppe , Chiacchio Ugo , Giofrè Salvatore V. , Romeo Roberto , Iannazzo Daniela , Legnani Laura
Published: December 2018

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Heterocyclic compounds represent a significant target for anti-cancer research and drug discovery,
due to their structural and chemical diversity. Oxazoles, with oxygen and nitrogen atoms present
in the core structure, enable various types of interactions with different enzymes and receptors,
favoring the discovery of new drugs. Aim of this review is to describe the most recent reports on the
use of oxazole-based compounds in anticancer research, with reference to the newly discovered
iso/oxazole-based drugs, to their synthesis and to the evaluation of the most biologically active derivatives.
The corresponding dehydrogenated derivatives, i.e. iso/oxazolines and iso/oxazolidines, are also
reported.