bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of ICT: conceptual comparative analysis of consumer behavior in Europe and Asia
Authors: Al Majzoub Khaled , Davidavičienė Vida
Published: May 2019

Today’s society is becoming the information and communication technology societies, where ICT is responsible for the creation, distribution, and manipulation of information in every aspect of society (Xiang, Magnini, & Fesenmaier, 2015). The following article will present a comparative analysis of one aspect of consumer changes caused by ICT, which is e-commerce between Europe and Asia, using Hofstede’s culture dimensions (Power distance, individualism, masculinity and uncertainty avoidance).

Purpose – to provide a comparative analysis of consumer behavior changes caused by ICT between Europe and Asia.

Research methodology – a synthesis of review of the literature.

Findings – provide insight into the difference in consumer behavior changes caused by ICT, between Europe and Asia and provide the basis for future researches.

Research limitations – future research should include empirical research and study of other solution and other factors that affect consumer behavior.

Practical implications – the practical implication of the article provide a framework for organizations to take into consideration, the difference in consumer behavior between countries when it is targeting their markets.

Originality/Value – no comparative.
Photometry of Active Centaurs: Colors of Dormant Active Centaur Nuclei
Authors: Wong Ian , Mishra Aakash , Brown Michael E.
Published: May 2019

We present multiband photometric observations of nine Centaurs. Five of the targets are known active Centaurs (167P/CINEOS, 174P/Echeclus, P/2008 CL94, P/2011 S1, and C/2012 Q1), and the other four are inactive Centaurs belonging to the redder of the two known color subpopulations (83982 Crantor, 121725 Aphidas, 250112 2002 KY14, and 281371 2008 FC76). We measure the optical colors of eight targets and carry out a search for cometary activity. In addition to the four inactive Centaurs, three of the five active Centaurs showed no signs of activity at the time of observation, yielding the first published color measurements of the bare nuclei of 167P and P/2008 CL94 without possible coma contamination. Activity was detected on P/2011 S1 and C/2012 Q1, yielding relatively high estimated mass loss rates of 140 ± 20 and 250 ± 40 kg s−1, respectively. The colors of the dormant nuclei are consistent with the previously published colors, indicating that any effect of non-geometric scattering from Centaur dust or blanketing debris on the measured colors is minimal. The results of our observations are discussed in the context of the cause of Centaur activity and the color distributions of active and inactive Centaurs. We suggest that the relative paucity of red Centaurs with low-perihelion orbits may not be directly due to the blanketing of the surface by unweathered particulates, but could instead be a result of the higher levels of thermal processing on low-perihelion Centaurs in general.
The Dependence of Convective Core Overshooting on Stellar Mass: Reality Check and Additional Evidence
Authors: Claret Antonio , Torres Guillermo
Published: May 2019

Overshooting from the convective cores of stars more massive than about 1.2 M
☉ has a profound impact on their subsequent evolution. And yet, the formulation of the overshooting mechanism in current stellar evolution models has a free parameter (

in the diffusive approximation) that remains poorly constrained by observations, affecting the determination of astrophysically important quantities such as stellar ages. In an earlier series of papers, we assembled a sample of 37 well-measured detached eclipsing binaries to calibrate the dependence of

on stellar mass, showing that it increases sharply up to a mass of roughly 2 M
☉, and remains constant thereafter out to at least 4.4 M
☉. Recent claims have challenged the utility of eclipsing binaries for this purpose, on the basis that the uncertainties in

from the model fits are typically too large to be useful, casting doubt on a dependence of overshooting on mass. Here we reexamine those claims and show them to be too pessimistic, mainly because they did not account for all available constraints—both observational and theoretical—in assessing the true uncertainties. We also take the opportunity to add semiempirical

determinations for 13 additional binaries to our previous sample, and to update the values for 9 others. All are consistent with and strengthen our previous conclusions, supporting a dependence of

on mass that is now based on estimates for a total of 50 binary systems (100 stars).
ALMA Reveals Potential Evidence for Spiral Arms, Bars, and Rings in High-redshift Submillimeter Galaxies
Authors: Hodge J. A. , Smail I. , Walter F. , Cunha E. da , Swinbank A. M. , Rybak M. , Venemans B. , Brandt W. N. , Rivera G. Calistro , Chapman S. C. , Chen Chian-Chou , Cox P. , Dannerbauer H. , Decarli R. , Greve T. R. , Knudsen K. K. , Menten K. M. , Schinnerer E. , Simpson J. M. , Werf P. van der , Wardlow J. L. , Weiss A.
Published: May 2019

We present subkiloparsec-scale mapping of the 870 μm ALMA continuum emission in six luminous (L
IR ∼ 5 × 1012
L
⊙) submillimeter galaxies (SMGs) from the ALESS survey of the Extended Chandra Deep Field South. Our high-fidelity 0.″07-resolution imaging (∼500 pc) reveals robust evidence for structures with deconvolved sizes of ≲0.5–1 kpc embedded within (dominant) exponential dust disks. The large-scale morphologies of the structures within some of the galaxies show clear curvature and/or clump-like structures bracketing elongated nuclear emission, suggestive of bars, star-forming rings, and spiral arms. In this interpretation, the ratio of the “ring” and “bar” radii (1.9 ± 0.3) agrees with that measured for such features in local galaxies. These potential spiral/ring/bar structures would be consistent with the idea of tidal disturbances, with their detailed properties implying flat inner rotation curves and Toomre-unstable disks (Q < 1). The inferred one-dimensional velocity dispersions (σ
r ≲ 70–160 km s−1) are marginally consistent with the limits implied if the sizes of the largest structures are comparable to the Jeans length. We create maps of the star formation rate density (ΣSFR) on ∼500 pc scales and show that the SMGs are able to sustain a given (galaxy-averaged) ΣSFR over much larger physical scales than local (ultra)luminous infrared galaxies. However, on 500 pc scales, they do not exceed the Eddington limit set by radiation pressure on dust. If confirmed by kinematics, the potential presence of nonaxisymmetric structures would provide a means for net angular momentum loss and efficient star formation, helping to explain the very high star formation rates measured in SMGs.
First record of Platyceps rhodorachis (Jan in de Filippi, 1865) from the Alay Mountains, southern Kyrgyzstan
Authors: Jablonski Daniel , Bragin Andrei
Published: May 2019

We report recent observations ofPlatycepsrhodorachis(Jan in de Filippi, 1865) from Kyrgyzstan and the first species record from the Alay Mountains. It represents an important range extension in the Central Asiatic distribution of the species.
Scènes de meurtre
Authors: Kohon Gregorio , Apfelbaum Laurence , Schmidt Virginie
Published: May 2019

On présente le cas d'une femme incapable d'avoir des relations proches. Les limites imposées par le cadre psychanalytique vont devenir rapidement source de ressentiment. Et l'on va voir se déplier une multiplicité de scènes triangulaires spécifiques qui illustrent les déformations complexes et troublantes de la scène primitive, une scène primitive envisagée comme l'arène de scénarios sadomasochistes. La patiente vivait sous l'emprise d'une compulsion à reproduire la structure d'un trauma originel : une relation symbiotique narcissique à l'imago d'une mère omnipotente, qui fut éprouvée de manière extrême, soit en tant que bon objet idéalisé, soit en tant qu'objet profondément mauvais, endommagé et persécuteur.
Tipificación en Gutierrezia (Asteraceae, Astereae)
Authors: Ratto F. , Schiavinato D. J. , Bartoli A.
Published: May 2019

Durante el transcurso de la revisión de las especies sudamericanas de Gutierrezia, hemos podido hallar nombres que requieren tipificación. Luego del análisis de los protologos y especímenes de herbario, hemos designado ocho lectótipos y un neótipo para nueve nombres del género Gutierrezia. Además, se asignó la categoría de hólotipo a un especimen. Se provee una discusión detallada para cada nombre.
Exploring Information Technology and Total Quality Management Implementation by Food and Drink Manufacturing Enterprises
Authors: Zioupou Sofia , Manos Basil , Andreopoulou Zacharoula , Tzimitra-Kalogianni Irini
Published: May 2019

The purpose of this study was to examine the implementation of Total Quality Management (TQM) as a business strategy in the Greek food and drink industry, along with the examination of the Information Technology (IT) adoption in the field. A research project was carried out in the sector companies based in Greece, using the questionnaire method. Findings showed a strong relation between IT implementation and impact of IT on TQM. Company size also seemed to affect TQM implementation, and the majority of IT implementation constructs, while company performance was not significant in terms of net profit margin and value added per employee.
A Novel Meta-Information Management System for SaaS
Authors: Mandal Amit Kr , Sarkar Aniban
Published: May 2019

Cloud hosts numerous services with various underlying business logic and data stores. In this multifaceted and distributed environment locating or updating SaaS services is a crucial task. Researchers proposed various mechanism for this purpose, which involves accessing or altering the meta-information of the services, its underlying business logics. Thus, management of meta-information is crucial for SaaS services. It demands efficient categorization and cataloguing mechanism by preserving semantic-relationships among interrelated services, business processes and data sources. This article proposes a flexible and scalable meta-information management system for SaaS, capable of maintaining dependencies among various SaaS resources. It is useful towards identification of interrelated business processes, services and data sources and facilitates incremental update of meta-information. The proposed system is implemented using Hadoop and a series of experiments have been carried out, which shows that it can efficiently scale and effectively categorize and catalogue different SaaS resources.
Multi-Objective Genetic Algorithm for Tasks Allocation in Cloud Computing
Authors: Harrath Youssef , Bahlool Rashed
Published: May 2019

The problem of allocating real-time tasks to cloud computing resources minimizing the makespan is defined as a NP-hard problem. This work studies the same problem with two realistic multi-objective criteria; the makespan and the total cost of execution and communication between tasks. A mathematical model including objective functions and constraints is proposed. In addition, a theoretical lower bound for the makespan which served later as a baseline to benchmark the experimental results is theoretically determined and proven. To solve the studied problem, a multi-objective genetic algorithm is proposed in which new crossover and mutation operators are proposed. Pareto-optimal solutions are retrieved using the genetic algorithm. The experimental results show that genetic algorithm provides efficient solutions in term of makespan for different-size problem instances with reference to the lower bound. Moreover, the proposed genetic algorithm produces many Pareto optimal solutions that dominate the solution given by greedy algorithm for both criteria.
Design and Construction the RF Ion Source for Compact Accelerator with 30 keV Energy
Authors: Janpong Keratiya
Published: May 2019

In constructing the low energy accelerator for plant modification the most important part is the ion source. In the conventional cold cathodes and hot filament ion source methods the filament continuously burns out over time, has a shorter lifespan and requires venting of the ion source to atmosphere. Henceforth the Radio frequency (RF) antenna ion source or “non-thermionic ion source” with 13.6 MHz was used in the accelerator as well as it being easy to generate varie the plasma souce and stability. This ion source can produce a particle beam of about ~30 to 40 mA current. The ion particle was extracted by the first zero voltage extraction rod electrode method focusing the ion beam of 0-30 kV with the second rod electrode after which the third rod electrode has zero voltage. In calculating and designing this system via the Simion8.0 Program, the result showed that the Ar+ ion beam with 30 keV can be focused with 1 cm diameter beam at the distance of 10 cm of the drift space.
Analysis of Stress Distribution for Powder Compression Molding by Finite Element Method
Authors: Chartpuk Prakorb , Chaimahapuk Chaiwat
Published: May 2019

The ultrasonic mold was designed for the ceramic powder compression. CAD and CAE were used in the design to analyze the mold strength and its natural frequency. The study of stress distribution and compression in upper and lower punch, mold body and waveguide comparison of stresses was analyzed by FEA experiments under maximum compression at 50,000 N to validate the results of both methods and the mold natural frequency. The difference between FEA and experimental analysis was 3-7%, acceptable. The redesign results in a cylindrical mold body with the outer diameter of 80 mm, the height of 100 mm, and the upper punch of 125 mm in length. The six sides are 26 mm of the high waveguide with 100 mm height. The internal and external diameters are 80 and 110 mm, respectively. The mold has been redesigned and can support the maximum compression force of 1,500 kN. with the bearing steel, AISI 52100, obtainable hardness 65 HRC, the stress concentration occurs at the neck of the upper punch using the ultrasonic at 12.00 to 12.45 kHz.
Multiple Reflections Modeling for Multi-Layered Optical Structures
Authors: Pechprasarn Suejit , Albutt Naphat
Published: May 2019

Fresnel equations and transfer matrix approach are usually employed to solve for exact solution to Maxwell’s equations for multi-layered optical structures. In this paper, we demonstrate that the Fresnel equations and transfer matrix approach can be expanded using Geometric series. This geometric series give an insight to how the light is trapped and behaves in multi-layered optical structures. It also allows us to calculate multiple reflections and count the number of round-trip inside the structure. One main issue in optical calculation is that layers are usually treated as an infinitely large layer. This is, of course, not practical in term of device fabrication. We also demonstrate how this simple geometric calculation will enable us to calculate a smallest practical size that can accommodate a required optical resonant effect.
Uses of Coconut Residue from Coconut Oil with Extracted Curcuma longa Production for Juvenile Red Claw Crayfish Feeding
Authors: Penprapai Norasing , Ratanamusik Amporn , Jankeaw Jakapech , Pradubkan Thanawat , Penprapai Pensri
Published: May 2019

Coconut protein residue from production of coconut oil with extracted Curcuma longa has high antioxidant as curcuminoids, and high protein which are needed for growth performance and survival rate of Juvenile red claw crayfish (Cherax quadricarinatus). The objective of this work was to study the effects of coconut protein residue from production of coconut oil with extracted Curcuma longa in feed to growth performance and survival rate of Juvenile red claw crayfish. The experiment was carried out using plastic bucket systems with three treatment conditions: T1 used pellet (control); T2 used cream protein from virgin coconut oil (VCO); T3 used cream protein from coconut oil with extracted Curcuma longa (COC), respectively. Feed with cream protein from COC and VCO has significant effect on weight gain and feed conversion ratio (FCR) of Juvenile red claw crayfish when compared to Juvenile red claw crayfish in the control diet. FCR in the control group was significantly (p<0.05) higher than those of the treated groups. Weight gain was highest in the T3. Survival rate of every treatment was 100%. The result indicated that the cream protein from COC with high protein and high antioxidant is a potential additive in the Juvenile red claw crayfish diet.
Newly Established Method for Analyzing the Natural Ethylene Indicators Dissolved in Water Immersed Plant Using Acidified Potassium Manganate
Authors: Chayaprasert Wilailack , Sompornpailin Kanokporn
Published: May 2019

Ethylene is a plant growth regulator (PGR) that mainly influences on growth and development of plant and their agricultural productivity. Ethylene producing from plant tissue is a physiological indicator which refers to the maturity, senescence, or stress of plants. Therefore, a monitoring level of ethylene in plant tissue is necessary for research and commercial processes. Current method measuring gaseous ethylene is costly and take a long time. This research established a new method to quantify ethylene gas in water immersed plant by using an oxidation reaction between oxidizing agent (KMnO4) and alkene functional group of ethylene under acidic solutions. Then, the leftover KMnO4 in solution was quantitatively evaluated by spectrophotometry method. An absorbance at the wavelength 525 nm were compared to the standard curve. The purple intensity of KMnO4 inversely relates to the concentration of ethylene. Water immersions of leaf and flower samples which have different in dissolved ethylene were analyzed under this method. The result showed the difference in ethylene emission between plant varieties (normal tobacco and less-ethylene emission tobacco), plant organs (leaf and flowers) and also organ senescent levels. The result indicates that the concentration of ethylene in water is concordant with the physiology of tobacco leaf and flower. Therefore, the ethylene level in water immersed plant sample can be estimated by this established method.
Amperometric Biosensors Using Different Alcohol Oxidases
Authors: Tipmanee Manatsapon , Thanachasai Saipin
Published: May 2019

Amperometric biosensors were fabricated by immobilizing alcohol oxidases (AOX) from two different sources onto glutaraldehyde (GA)-activated supports. Alcohol oxidases fromHansenulasp. and fromPichia pastoriswere employed for immobilization. The biosensor with AOX fromHansenulasp. showed a linear response to ethanol in the concentration range of 0.1-0.6 mM with a sensitivity of 88.534 µA mM-1cm-2and a detection limit of 0.1 mM (S/N=3). In comparison, the biosensor with AOX fromP. pastorisshowed a linear response from 0.1-0.5 mM ethanol with a sensitivity of 76.886 µA mM-1cm-2and a detection limit of 0.1 mM. The study of stability of biosensors revealed that after 90 measurements, the biosensor with AOX fromHansenulasp. retained 97% of its original current response whereas the current response of the biosensor with AOX fromP. pastorisdecreased to 81% of its initial value. The biosensor with AOX fromHansenulasp. demonstrated slightly higher sensitivity and stability than the biosensor with AOX fromP. pastoris.
Thymic Development of a Unique Bone Marrow–Resident Innate-like T Cell Subset with a Potent Innate Immune Function
Authors: Yamamoto Ryusuke , Xu Yan , Ikeda Satoshi , Sumida Kentaro , Tanaka Hiroki , Hozumi Katsuto , Takaori-Kondo Akifumi , Minato Nagahiro
Published: May 2019

Mainstream CD8+ and CD4+ T cells of αβ lineage are developed in the thymus through TCR-mediated selection in the context of MHC class I and MHC class II in association with self-peptides, respectively. In addition, minor αβT cells bearing invariant TCRs, NKT cells, and mucosal-associated invariant T cells are selected via MHC-like molecules, CD1d, and MR1 complexed with nonpeptide Ags, respectively, parts of which express neither CD4 nor CD8. In this study, we indicate that bone marrow (BM), but barely other lymphoid tissues, harbors CD4/CD8 double-negative αβT cells with an apparently diverse TCR repertoire at considerable proportions in healthy adult mice. The BM-resident double-negative αβT (BMDNT) cells are developed in the thymus in a Notch and IL-7–dependent manner but independently of known restriction elements, including MHC class I, MHC class II, CD1d, and MR1. These cells are sustained in BM throughout the adult stage with “homeostatic” proliferation via IL-1β derived from normal myeloid cells dominating the BM environment. Although BMDNT cells secrete a unique set of cytokines, including IL-17, GM-CSF, IL-3, and CCL chemokines on TCR stimulation, these T cells also express a series of NK receptors and exhibit a potent NK-like cytotoxic activity. Furthermore, BMDNT cells show robustly accelerated proliferation and activation following systemic administration of TLR ligands likely through the enhanced production of IL-1β by myeloid cells in situ. Our results suggest that αβT lineage cells that are developed in the thymus by default of TCR-mediated selection are maintained and differentiated to innate-like T cells in BM and may play a role in innate immunity in the hematopoietic environment.
A preliminary study on the potential of front face fluorescence spectroscopy for Italian mono-cultivar extra virgin olive oil discrimination
Authors: Al Riza Dimas Firmanda , Kondo Naoshi , Catalano Pasquale , Giametta Ferruccio
Published: May 2019

Front-face fluorescence method has been used to obtain fluorescence excitation emission matrix (EEM) characteristic of various Italian monocultivar extra virgin olive oil (EVOO), Mixed EVOO, and lower grade virgin olive oil. Specific region of EEM has been explored using principle component analysis. It was found that EEM region of excitation 250-400 and emission 280-620 nm could be used to discriminate each sample type of different cultivar, mixed sample, and virgin olive oil sample. The important fluorescence peaks for the discrimination belong to unique combination of tocopherols, tocotrienols, phenolic compounds, oxidation products, and vitamin E. These results show that frontface fluorescence EEM spectroscopy has a potential to be used for monocultivar EVOO discrimination.
Lymphedema and nutrition: A review
Authors: Cavezzi Attilio , Urso Simone Ugo , Ambrosini Lorenzo , Croci Sonia , Campana Fausto , Mosti Giovanni
Published: May 2019

Nutrition is considered a basic component in the management of any vascular disease. Lymphedema is characterised by an increase of interstitial fluid due to a lymphatic system morphological and/or functional alteration. Therapeutic management of lymphedema includes a multi-faceted approach based on compression and physiotherapy mainly. Weight control and antiinflammatory and anti-edema diet are two additional necessary components of the holistic therapy in presence of primary or secondary limb lymphedema. This narrative review provides the available information derived from the scientific literature on nutrition in lymphedema, which anyway lacks robust evidence. Additional information and speculations are provided on the role of food, diet, nutraceuticals and fasting on the basic processes at the root of the chronic progressive degeneration of tissue lymph stasis, i.e. weight excess, inflammation, edema, fibroadiposis. More targeted and randomized studies are needed in order to assess and standardise the obvious, so far neglected, role of nutrition in lymphedema patients.
Doctor, is there a drug that could stengthen my veins?
Authors: Cogo Alberto
Published: May 2019

Not available
Thoracic dorsal dermal sinus with secondarily infected intramedullary dermoid cyst
Authors: Patwari Sriram , Reddy Bhavana , Kapanigowda Manoj , Ramesha Sujith , Chadaga Harsha
Published: May 2019

Dorsal dermal sinus (DDS) is an uncommon type of occult spinal dysraphism most often located in the lumbar region. Patients present either due to secondary infection or compression of neural structures by an associated dermoid or epidermoid cyst. We report a rare case of 2-year-old child who presented with progressive paraparesis with magnetic resonance imaging of spine showing a thoracic DDS with an infected intramedullary dermoid cyst. Partial excision of the dermoid cyst and resection of the sinus opening was done with partial clinical improvement postsurgery.
“Contralateral dry eye in hemifacial spasm:” A new clinical sign
Authors: Gosal Jaskaran , Das Kuntal , Khatri Deepak , Attri Gagandeep , Jaiswal Awadhesh
Published: May 2019

Hemifacial spasm (HFS) is a benign condition characterized by unilateral, involuntary, paroxysmal clonic and tonic contractions of the facial muscles. This condition usually results from a focal demyelination at the root entry zone of the 7th cranial nerve secondary to a vascular loop compression, and hence, it responds to microvascular decompression (MVD) surgery, similar to trigeminal neuralgia. Herein, we report an interesting clinical finding of a contralateral dry eye in the case of HFS, which has not been described previously and discuss the possible underlying mechanisms. A 53-year-old man presented with a 6-month history of involuntary twitching movements of the left hemiface that persisted during sleep, consistent with the diagnosis of HFS. The patient's attempts to voluntarily control the troublesome involuntary left-sided eye blinking led to the development of dryness and reddening of the right eye. Corneal reflex, both direct and consensual, was intact bilaterally, and an ophthalmological examination ruled out the diagnosis of conjunctivitis. The patient underwent MVD of the facial nerve. To our surprise and validating our supposition, his contralateral conjunctival hyperemia and dry eye resolved within a day of surgery, along with complete resolution of the HFS. HFS can lead to the contralateral dry eye from the voluntary suppression of ocular blinking which resolves following MVD. We demonstrate this finding for the first time and believe its recognition may be of value in the patient management.
Reliability of ABC/2 method in measuring of infarct volume in magnetic resonance diffusion-weighted image
Authors: Sananmuang Thiparom , Dejsiripongsa Thanya , Keandoungchun Jesada , Apirakkan Mungkorn
Published: May 2019

Aims: Manual planimetry is the current method defining infarct volume on magnetic resonance (MR) diffusion-weighted image. ABC/2 method is an ellipsoid geometric formula with advantage estimation of intraparenchymal hemorrhage volume. Our study aimed to find the reliability and reproducibility of ABC/2 method compared to manual planimetric segmentation method. Settings and Design: This was a cross-sectional analytical study with retrospective and prospective data collection. Subjects and Methods: A total of 109 patients with acute ischemic stroke and underwent MR images at Ramathibodi Hospital were retrospectively reviewed. Relationship between manual planimetric segmentation and ABC/2 methods (nonadjusted ABC/2 method and adjusted ABC*/2 method) was determined using Wilcoxon signed-rank test, linear regression analysis, and Bland–Altman plot. Subgroup analysis by location, onset, shape, and size of infarct volume was performed. Interobserver reliability was established using intraclass correlation coefficient and Bland–Altman plot. Statistical Analysis Used: Wilcoxon signed-rank test, linear regression analysis, and Bland–Altman plot were used for statistical analysis. Results: Infarct volume measured with nonadjusted ABC/2 method (23.56, 48.81, 4.25, 0.11, 318.94) (mean, standard deviation, median, minimum, maximum) and adjusted ABC*/2 method (13.37, 28.3, 2.08, 0.06, 170.10) was smaller than manual planimetric method (28.50, 58.64, 5.56, 0.27, 335.49) (P < 0.001). Linear regression's slope confirmed underestimation of volume infarct. In round-to-ellipsoid shape and white matter group, the differences found between nonadjusted ABC/2 and manual planimetric methods are not statistically significant. Conclusions: ABC/2 method is a simple, rapid, and reproducible method with an excellent positive correlation of both adjusted and nonadjusted ABC/2 methods to manual planimetric segmentation method but tendency to underestimated infarct volume. High interobserver reliability and good agreement between two observers have been established. The utilization of nonadjusted ABC/2 method should be used with caution due to its tendency to underestimate the infarct volume.
Mean value results and $\Omega$-results for the hyperbolic lattice point problem in conjugacy classes
Authors: Chatzakos Dimitrios
Published: May 2019

For

\Gamma

a cofinite Fuchsian group, we study the lattice point problem in conjugacy classes on the Riemann surface

\Gamma\backslash\mathbb H

. Let

\mathcal{H}

be a hyperbolic conjugacy class in

\Gamma

and

\ell

the

\mathcal{H}

-invariant closed geodesic on the surface. The main asymptotic for the counting function of the orbit

\mathcal{H} \cdot z

inside a circle of radius

t

centered at

z

grows like

c_{\mathcal{H}} e^{t/2}

. This problem is also related with counting distances of the orbit of

z

from the geodesic

\ell

. For

X \sim e^{t/2}

we study mean value and

\Omega

-results for the error term

e(\mathcal{H}, X ;z)

of the counting function. We prove that a normalized version of the error

e(\mathcal{H}, X ;z)

has finite mean value in the parameter

t

. Further, we prove that if

\Gamma

is cocompact then

\begin{align*} \int_{\ell} e(\mathcal{H}, X;z)\, d s(z) = \Omega \big( X^{1/2} \log \log \log X \big). \end{align*}

For

\Gamma = {\hbox{PSL}_2( {\mathbb Z})}

we prove the same

\Omega

-result, using a subconvexity bound for the Epstein zeta function associated to an indefinite quadratic form in two variables. We also study pointwise

\Omega_{\pm}

-results for the error term. Our results extend the work of Phillips and Rudnick for the classical lattice problem to the conjugacy class problem.
The compliance of South Africa's patents compulsory licensing regime to the TRIPs Agreement
Authors: Forere Malebakeng Agnes
Published: May 2019

In South Africa, patents compulsory licences can be issued under the Patents Act or Competition Act although the latter is not explicit. Whereas there has not been a single compulsory licence issued through the Patents Act, there is however a growing interest to obtain compulsory licences of drugs using the competition law regime. Focusing specifically on the standard of compensation, the objectives of this paper are two-fold: first, it seeks to determine why there is a growing interest in resorting to the competition route as opposed to the Patents Act. Secondly, the paper aims to determine the extent to which the South African compulsory licensing regime complies with the TRIPs Agreement. It is found herein that the standard of compensation under patents law is higher than that found in the competition law cases. Further, it is found however that compulsory licences issued through the competition law do not take into account the procedural safeguards that are found in the Patents Act as well as the TRIPs Agreement; as such, they undoubtedly infringe the rights of the patentees. The article recommends that the South African Competition Act should be reviewed with a view to aligning its compulsory licensing scheme with that of the Patents Act and the TRIPs Agreement, thereby establishing a nexus between competition law and patents law. This paper comes at an opportune moment in which South Africa and China are urging other WTO members to share their national experiences on the use of competition law to ensure access to health, and it shall therefore shed some light on how South Africa does it and the obstacles therein.
Examining Teachers’ Roles in Online Learning
Authors: Huang Qiang
Published: May 2019

Online learning has been used in the literature to cover diverse learning contexts ranging from blended learning, distance learning, virtual learning and web-enhanced learning. Many aspects of online learning have become the focuses of research and teacher roles are one of them. The present study, therefore, intends to examine how 153 university students perceived the roles of their teachers in online learning of a blended English course by using a 27-item and 5-Likert-scale questionnaire (the STRI). Results of statistical analyses showed that the Cronbach’s Alpha value of the entire questionnaire was .955 and those of the three sub-roles were all above .891, indicating that both the questionnaire and the three factors of sub-roles were reliable and valid. Further analyses revealed that the three sub-roles of teachers, i.e., the cognitive role, the affective role and the managerial role, were significantly different from each other. Among them, the means of the managerial role was significantly higher than that of the cognitive role while the means of the affective role was the lowest. Results of descriptive statistics also revealed that keeping a record of students’ learning in the managerial role was quite notable for students. The findings suggest that the roles of teachers in online learning as a whole were reduced. However, the managerial role was more notable than the other two roles and the affective role was the least impactful in the online learning context in this study. The researcher believes that these findings may offer some insights to classroom implications and provide the basis for future studies of comparing teacher roles across different educational contexts.
A trajetória de Chien Shiung Wu e a sua contribuição à Física
Authors: Maia Filho Angevaldo Menezes , Silva Indianara Lima
Published: May 2019

O campo gênero e ciência tem contribuído para a construção de novas histórias, agora, de mulheres cientistas, novos olhares para a prática científica e novas reflexões para uma ciência mais representativa. Com o intuito de contribuir para mais histórias de mulheres nas ciências, discutiremos a trajetória da física experimental sino-estadunidense Chien Shiung Wu e a sua contribuição à física a partir da análise de literatura primária e secundária. Wu é considerada uma das mais importantes cientistas do século XX, desenvolvendo técnicas e experimentos que foram extremamente importantes para a física moderna, e, ainda assim, é pouco explorada pela literatura de história das ciências. Ao analisar a sua trajetória, percebemos que Wu enfrentou dificuldades e obstáculos de ordens distintas: segregação hierárquica e institucional, e discriminação de raça e gênero. Por fim, acreditamos que escrever histórias de mulheres cientistas possa contribuir para uma ciência mais representativa, e, consequentemente, para romper com a visão androcêntrica do fazer científico.
A topografia da sala de aula online: reflexões a partir de uma experiência de pesquisa-formação com professores de ciências
Authors: Santos Enadieliton Dos , Silva Ivanderson Pereira da
Published: May 2019

A disciplina “Temas de física na pesquisa-formação de professores” foi ofertada na modalidade online, no segundo semestre de 2017, nos Programas de Pós-graduação (PPG) em Educação em Ciências e em Ensino de Física da Universidade Federal do Rio Grande. Além dos alunos desses PPG, participaram dessa disciplina, alunos e professores dos cursos de Física Licenciatura da Universidade Federal do Pampa e da Universidade Federal de Alagoas (UFAL), bem como alunos do PPG em Ensino de Ciências e Matemática da UFAL. Tal experiência reuniu 18 sujeitos que compuseram grupos e exploraram temas de Física na perspectiva da pesquisa-formação. Dado o perfil dos sujeitos e da proposta de construção de uma sala de aula interativa, emergiu o seguinte problema de pesquisa: Qual a topografia da sala de aula construída a partir das interações online no contexto da pesquisa-formação? Trata-se de uma investigação qualitativa, classificada como um estudo de interação por meio de dados escritos. Como recurso de análise, foi realizado o mapeamento das interações dos sujeitos. Dentre os módulos que compuseram esta disciplina, foi analisado apenas o módulo 5 intitulado “O cordel no ensino de Física”. A escolha se justificou pelo fato deste conter o fórum com o maior número de interações. Nesse movimento de pesquisa, analisamos seu desenho didático, material didático, a docência online e da topografia da sala de aula constituída a partir das interações dos sujeitos. Como resultados constatamos que apesar das intervenções que ocuparam a posição discente indicarem majoritariamente uma comunicação todos-todos, do desenho didático estar apoiado na flexibilidade e na interatividade do ciberespaço, bem como do material didático ter sido produzido de forma dialógica, multimidiática e hipertextual, as intervenções dos sujeitos que ocuparam a posição docente acabaram por centralizar as interações, resultando numa topografia intermediária entre a sala de aula tradicional e a sala de aula interativa.
ENEM, prática docente e metodologias ativas: uma equação que não fecha
Authors: Silva Erick Dos Santos
Published: May 2019

A partir de uma revisão literária duodecenal, em periódicos dedicados explicitamente ao ensino de física, observamos que a relação entre ENEM e prática docente não é investigada. Discussões sobre a possibilidade do ENEM estar contribuindo para a promoção de posturas mais tradicionais em sala de aula são fortemente evitadas nesses últimos 20 anos. Nessa perspectiva, o exame estaria em grande conflito com as ideias estruturantes das metodologias de aprendizagem ativa. O trabalho apresenta os detalhes da revisão implementada, propondo que os possíveis mecanismos de influência do referido exame, nas atividades de sala de aula, sejam trazidos para o centro das discussões sobre ensino de física.
Rev. investig. Logop. 9(1) 2019: 67-79 67 Efecto inmediato de la terapia de tracto vocal semiocluido en los parámetros acústicos en personas transexuales entre 13 a 24 años
Authors: Sandoval Zúñiga María Soledad , Fuenzalida C. Rodrigo , Pérez Z. Tanya , Torres Ch. Francisco
Published: May 2019

El presente estudio tiene como propósito describir el efecto inmediato de la terapia de tracto vocal semiocluido (TVSO) sobre los parámetros acústicos de personas transexuales entre 13 a 24 años. Es un estudio de tipo cuantitativo, con un diseño preexperimental con pre y post prueba, cuya dimensión de temporalidad es trasnversal y cuyo alcance es descriptivo. La muestra está constituida por 8 personas transexuales de 13 a 24 años de la comuna de Chillán, Chile, que no han recibido ningún tratamiento que pueda modificar sus características vocales. El instrumento utilizado para medir los parámetros acústicos es el programa de análisis acústico de la voz PRAAT (Boersma y Weenink, 2018). Los resultados indican que aunque los valores de los parámetros acústicos disminuyeron sólo existe un efecto inmediato en los parámetros acústicos Jitter Local y Jitter Rap, ya que muestra diferencias significativas antes y después de la terapia TVSO. De acuerdo a la perturbación de la frecuencia fundamendal, la voz de las participantes se hizo más grave y la relación armónico ruido se acercó al valor de normalidad luego de la terapia. Finalmente, se concluye que la terapia de TVSO tiene efecto inmediato en el parámetro acústico Jitter, en personas que transitan de sexo femenino a masculino de 13 a 24 años y puede considerarse un alternativa viable y complementaria en el proceso de masculinización de la voz.
Effects of Public Expenditure Management Practices on Service Delivery in the Public Sector: The Case of District Assemblies in Ghana
Authors: Scott George Kojo
Published: May 2019

This research analysed how the public expenditure management as practiced in the District Assemblies of Ghana affect service delivery. The research adopted a mixed-method research approach where qualitative and quantitative data were gathered using questionnaires, interviews, focus group discussions and document analysis. Multistage sampling was used to pick the respondents for the questionnaires, key interview informants and the participants in the focus group discussions. Thirty four out of 170 district assemblies which existed by 2008 were sampled. Participants in the study included 612 District Assembly (DA) officials, 1020 citizens, 28 national/regional officials and 20 participants in focus group discussions. Quantitative data, measured by using scaled-items, were analysed using descriptive statistics and regression while qualitative data were examined thematically. The study established that expenditure management practices had positive significant influence on service delivery. The study recommends that, the DAs should prioritize expenditures to key service delivery areas such as; those that enhance poverty reduction, improve on Human Capital index and strengthen Innovations practices. DAs should strengthen electronic, automation and appropriate technologies for better expenditure management and service delivery. There should be laws to ensure stiffer penalties and enforcement of sanctions on those involved in malpractices in public expenditure management practices, while persistent efforts are made to implement recommendations of Auditor General’s reports on DAs expenditures management practices.
MODELO DA POLIMERIZAÇÃO DA HEMOGLOBINA
Authors: Lacortt Marcelo , Dominguez Sandy Sánchez , Garcia Adolfo Fernández , Lopes Leide Maria Leão , Nascimento Rainey Ferreira do , Montalvam Zequias Ribeiro , Chaveco Antonio Iván Ruiz
Published: May 2019

No presente trabalho se faz um estudo da situação que se apresenta no Brasil com relação à sicklemia, indicando-se aqueles grupos de pessoas, principalmente por rasas, para os quais é mais comum essa doença. Introduz-se um sistema de equações diferenciais que simula o processo de formação de polímeros no sangue, e se estudam diferentes casos que se derivam do modelo geral apresentado. O sistema é simplificado em correspondência ao caso, se faz um estudo qualitativo do sistema de equações simplificado e se dão conclusões com relação ao comportamento futuro da doença e das condições em que estarão os pacientes em um tempo posterior.

Palavras chave: Polimerização. Modelo. Hemoglobina. Paciente.
APLICAÇÕES DA METODOLOGIA PARA ANÁLISE E IDENTIFICAÇÃO DE MINERAIS DO LABORATÓRIO DE ANÁLISE E IDENTIFICAÇÃO DE MATERIAS DO CT-PEDRAS/UPF
Authors: Becker Jr Rudimar Cavalini , Zibetti Thomas Felipe , E Lima Ipar Carlos Edmundo De Abreu , Vilasbôas Fernanda Da Silva
Published: May 2019

O presente trabalho tem como objetivo analisar de maneira prática a metodologia para análise e identificação de gemas no Laboratório de Análise de Materiais Gemológicos (LAMG) e Laboratório de Análise e Identificação de Materiais (LAIM) do Centro Tecnológico de Pedras, Gemas e Joias (CTPedras). O centro tecnológico apresenta equipamentos que permitem analisar gemas lapidadas e não-lapidadas de maneira não destrutiva, identificando características e propriedades físicas desses minerais (densidade, isotropia, refração, pleocroísmo, curvas de crescimento e inclusões, clivagem, qualidade de lapidação, composição química, entre outros). Para e seguinte estudo de caso, foram selecionadas de maneira aleatória e conforme disponibilidade, gemas apresentadas de maneira bruta e lapidada. Foram realizados os ensaios, e as propriedades físicas e características identificadas para cada material foram comparados com os valores indicados pela literatura técnica acerca do assunto, realizando a identificação de cada material. Também ficou claro a importância dos laboratórios do CT Pedras nesse contexto e a afirmação da metodologia utilizada para análise e identificação de gemas.
ANÁLISE DA HOMOGENEIDADE DE AMOSTRAS BIOCIMENTADAS ATRAVÉS DE MICROTOMOGRAFIA A RAIO-X
Authors: Gehlen Ânderson Dalbosco , Donato Maciel
Published: May 2019

A busca por métodos sustentáveis de reforços em solos, proporcionou um estudo sobre a técnica de biocimentação, em solo arenoso. De acordo com estudos recentes sobre a biocimentação, há muito a ser estudado sobre a homogeneidade (MONTOYA et al., 2012), e em alguns estudos como o de (CHENG E CORD-RUWISCH, 2012) relatam a ocorrência de cimentação a certas profundidades, no entanto não apresentam dados da distribuição porosa na estrutura. Através destas considerações, esta pesquisa buscou analisar a homogeneidade de solo biocimentado, com areia de Osório/RS, construindo parâmetros para retratar a biocimentação no microtomógrafo a raio-x, modelo InspeXio SMX-90CT, da marca Shimadzu. Por ser um equipamento de analise não destrutiva, tornando sua análise de maior interesse para pesquisas que pretendem contribuir com estudo da técnica biocimentante. Obtendo com estas varreduras a distribuição da homogeneidade na estrutura biocimentada. Comparando os volumes de vazios com os laudos obtidos no microtomógrafo a raio-x, do solo composto por areia de Osório/RS, sem adição de agentes bioestimulante.
Os indígenas na enxada: processos produtivos e de controle social na Colônia Militar de Caseros – 1858-1878
Authors: Tedesco João Carlos
Published: May 2019

O artigo analisa a presença e a importância dos indígenas na Colônia Militar de Caseros, entre 1858-1878. A referida colônia foi instituída no norte da Província do Rio Grande do Sul com a intenção de controlar o território para viabilizar a economia pastoril, a apropriação privada e econômica da terra, o extrativismo da erva mate, abrir estradas que ligassem com a região das missões e o centro do país, bem como garantir passagem dos tropeiros e viabilizar a produção agrícola. Para isso, havia necessidade de controlar, aldear e envolver os indígenas no empreendimento. Nesse sentido, a produção agrícola, a abertura de estradas e a extração de erva mate teriam a presença dos indígenas. Porém, houve resistências e muitos conflitos nessa tentativa. O texto nos auxilia na compreensão histórica das atuais demandas indígenas pela terra na região norte do estado.
Notícias de falsos vendavais: o golpe do Estado Novo de 1937 e o discurso de junho de 1940 nos jornais estadunidenses
Authors: Tomé de Souza Lins Lindercy Francisco
Published: May 2019

Analisar como a repercussão de dois episódios da política brasileira (o golpe de 10 de novembro de 1937 e o discurso de Getúlio Vargas de 11 de junho de 1940), por parte dos principais jornais estadunidenses, afetou a imagem do país nos EUA. Ademais, serão analisadas as medidas adotadas pelo governo brasileiro para contornar os problemas desencadeados à imagem do país pela imprensa estrangeira nos casos citados.
Novos desafios da educação a distância: programação e uso de Chatbots
Authors: Vieira Barros Daniela Melaré , Guerreiro Aníbal Martins
Published: May 2019

A evolução tecnológica, particularmente a Inteligência Artificial, tem contribuído significativamente para mudanças relevantes em quase todas as dimensões da nossa sociedade, nomeadamente na educação e, consequentemente, no Ensino à Distância. Tais mudanças exigem transformações significativas, especialmente no processo de ensino-aprendizagem, de forma a minimizar a incapacidade de os Tutores Virtuais responderem na totalidade às solicitações de suporte por parte dos alunos e, por isso, a necessidade enorme de potenciar as tecnologias existentes, com o objetivo de minorar essa dificuldade. Este artigo tem como objetivo compreender os novos desafios da Educação à Distância (EaD) no ensino superior online, nomeadamente a programação e uso de Chatbots, bem como as razões e causas para sua operacionalidade. A metodologia utilizada foi baseada no método dedutivo, resultante do processo de pesquisa bibliográfica e documental, em consonância com a investigação de doutoramento em curso sobre a temática dos tutores virtuais. Como resultados, a literatura especializada tem destacado a enorme vantagem do uso de chatbots (assistentes virtuais) na EaD no ensino superior online, devido aos enormes benefícios para os intervenientes diretos do processo de ensino-aprendizagem, ou seja: a instituição, os tutores e os alunos.
Revolução digital e educação: e agora?
Authors: D’Arienzo Maria Augusta
Published: May 2019

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