bluuebunny/crossref_metadata_2025 huggingface dataset:
La actividad del disc jockey en Colombia: Características y tendencias
Authors: Betancur Carlos
Published: August 2016

de una actividad consistente en reproducir la música en eventos sociales, fiestas, discotecas y en la radio, llevada a cabo por personas conocidas en todo el mundo como disc jockeys (DJ's). El estudio contó con la participación de cincuenta de estos profesionales de diferentes regiones de Colombia, a quienes se les suministró una encuesta electrónica que indagaba acerca de los géneros musicales, los formatos de uso actual, las percepciones y sus posturas frente al ejercicio profesional. Finalmente, se postula una línea de investigación en el campo de la psicoacústica, cuyo fin es abordar un fenómeno que todavía no es objeto de los desarrollos tecnológicos.
Lo más humano de la filosofía: La filosofía como modo de vida en las Cartas a Lucilio, de Séneca
Authors: Yepes Muñoz Wilfer Alexis
Published: August 2016

Este artículo, orientado en las Cartas a Lucilio, de Séneca, pretende reivindicar la filosofía como modo de vida. La propuesta senequista se actualiza en un panorama de crisis que desfigura ese colamus humanitatem –cultivo de la humanidad–. La existencia es auténtica en cuanto avizora en el hombre una dualidad como doble oportunidad de humanización: el cuerpo como señal de un alma que exige la virtud, la templanza y la valentía ante una lógica del consumo que elude nuestra indigencia vital
Preoperative Periarticular Knee Bone Mineral Density in Osteoarthritic Patients Undergoing TKA
Authors: Ishii Yoshinori , Noguchi Hideo , Sato Junko , Todoroki Koji , Ezawa Nobukazu , Toyabe Shin-ichi
Published: August 2016

Background:

Preoperative periarticular bone quality is affected by joint loading. The purpose of this study was to determine the periarticular bone mineral density of the knee joint of patients undergoing total knee arthroplasty, and whether the location of the load-bearing axis correlates with the measured bone mineral density.

Materials and Methods:

The bone mineral densities of the medial and lateral femoral condyles and the medial and lateral tibial condyles were analyzed in consecutive 116 osteoarthritic patients (130 knees) by dual energy x-ray absorptiometry.

Results:

The median bone mineral density values in the condyles were 1.138 in femoral medial, 0.767 in femoral lateral, 1.056 in tibial medial, and 0.714 in tibial lateral. The medial condyles showed significantly higher bone mineral densities than the lateral condyles in both the femur and tibia. In addition, the femoral medial showed significantly higher bone mineral density levels than the tibial medial, and the femoral lateral condyle had higher bone mineral density levels than the tibial lateral. The bone mineral density Medial/Lateral ratio was significantly negatively correlated with the location (tibial medial edge 0%, lateral edge 100%) of the load-bearing axis in the femur and tibia.

Conclusion:

Preoperative bone mineral density values may provide against the changes in bone mineral density after total knee arthroplasty by reflecting the correlation with joint loading axis. These results help explain why total knee arthroplasty has such good long-term clinical outcomes with a low frequency of component loosening and periarticular fractures despite a high degree of postoperative bone loss.
Anticonvulsant Activities of 4-benzylidene-6-(4-methyl-phenyl)-4,5-dihydropyridazin-(2H)-ones and 4-benzylidene-6-(4-chloro-phenyl)-4,5-dihydropyridazin-(2H)-ones
Authors: Asif Mohammad , Singh Anita
Published: August 2016

Background:

Two series of 4-benzylidene-6-(4-methyl-phenyl)-4,5-dihydropyridazin-(2H)-one compounds (3a-e) and 4-benzylidene-6-(4-chloro-phenyl)-4,5-dihydropyridazin-(2H)-ones (3f-j) were synthesized and evaluated as anticonvulsant agents.

Methods:

Synthesized compounds (3a-3j) were tested against maximum electro shock (MES) and Isoniazid (INH) induced convulsion methods for anticonvulsant activities and neurotoxicity.

Results:

In MES induced convulsions, result found that the compounds 3e and 3j exhibited highest anticonvulsant activities. In INH induced convulsions, result was indicated that all the compounds exhibited good anticonvulsant activities., whereas compounds 3d and 3j showed maximum activity. Methyl derivatives were more active than chloro derivatives. Phenytoin sodium (25mg/kg) and sodium vaproate (50mg/kg) were used as reference drugs. All these synthesized pyridazinone compounds (3a-j) did not exhibit any neurotoxicity up to 100 mg/kg dose levels.

Conclusion:

All compounds showed good anticonvulsant activities against both MES and INH induced convulsion models. Many such explorations are anticipated in the near future.
Effects of Acupuncture at the Left Weizhong Acupoint on Heart Rate Variability in Thirty Post-Stroke Patients—Results from a Transcontinental Teleacupuncture Study
Authors: Pang Bo , Zhang Qi , Cheng Guang-Yu , Cheng Wei-Ping , Litscher Daniela , Wang Lu , Sheng Zemin , Gaischek Ingrid , Sun Zhong-Ren , Litscher Gerhard
Published: August 2016

(1) Background: Within this study, we assessed the effects of acupuncture on heart rate variability (HRV) in Chinese post-stroke patients. (2) Methods: In 30 Chinese post-stroke patients (14 f, 16 m; mean age ± SD 64.3 ± 3.8 years; range 40 – 80 years) electrocardiographic signals before, during and after acupuncture at the left Weizhong acupoint (BL40) were recorded in Harbin and analyzed in Graz using teleacupuncture via internet. HRV data were analyzed in the time and frequency domain and a protocol from Austria was sent to the team in China immediately after the treatment and recording session. (3) Results: The standard deviation of normal to normal (SDNN) and total power of HRV (TP) didn’t change significantly during and after acupuncture (P>0.05), whereas high frequency (HF) decreased significantly during and after acupuncture (P<0.01), and low frequency (LF) increased significantly after acupuncture (P<0.05). Therefore, there was a marked increase in balance between sympathetic and parasympathetic activity (LF/HF HRV ratio) during and after treatment. (4) Conclusions: This study shows that HRV could be a useful parameter for quantifying regulatory effects of acupuncture on the autonomic nervous system. Together, our findings showed that acupuncture of the Weizhong point on the left side of the patients after cerebral infarction has no obvious influence on the heart rate and total HRV, but has an inhibitory effect on the vagus and excitatory effect on the sympathetic nerve.
Evaluation of the Agile Manifesto within Business Strategies
Authors: Kompalla Andreas , Kopia Jan
Published: August 2016

Every institution, company or single person needs a guideline aligning specific actions, processes and assets to an overall target. Recent research shows that guidelines of enterprises within the manufacturing branch or more specific within the automotive industry are almost identical. But new and emerging competitors force the traditional industry to adapt its business strategy and especially to increase flexibility. The internal and external changes within the manufacturing environment support this trend. The lead times are constantly shrinking and an increasing variety in customer demands has to be handled via new platforms and models. In conclusion, enterprises within the automotive industry need to increase agility and flexibility in order to stay competitive.

Within IT-project management, agility has been a focus since the end of the 1990s. Beneath that the automotive industry has applied several principles on the core value chain, logistics and production. But on the highest strategic level of an enterprise these principles have not been analyzed yet. This research paper is evaluating case studies in order to derive core agile aspects as well as principles. Based on that business strategies within the automotive branch are broken down and compared with these principles.

The result is that most of the agile aspects are not yet considered on the highest strategic business levels although they could increase the performance of enterprises within the automotive branch. But they need to be adapted to the specific characteristics.
Investigations on Erosion and Corrosion Behavior of High-Velocity Oxy-Fuel Sprayed WC-Cr3C2-Ni Coatings on AISI 1018 Steel
Authors: Ravichandran M. , Saravanan S. , Balasubramaniyan V.
Published: August 2016

WC-Cr3C2-Ni thermal spray coatings was applied on the surface of low carbon steel (AISI 1018) using high-velocity oxy-fuel (HVOF) process. The base metal, coating powder and coated materials were analyzed using scanning electron microscope. Water-jet erosion test (WJET) was used to test the mass loss of the samples with different process parameters such as impingement angle, water jet velocity, erodent discharge, and stand-off distance. As results lower mass loss was observed for the selected process parameters. Pitting corrosion test reveals that better corrosion resistance can be achieved for the low carbon steels by WC-Cr3C2-Ni powder coating.
Vergleich tribologischer Laboranalysen mit praktischen Ergebnissen aus Umform- und Zerspanprozessen am Beispiel von schwefelhaltigen Kühlschmierstoffen
Authors: Huesmann-Cordes A. G. , Meyer D. , Wagner A. , Brinksmeier E.
Published: August 2016

Kurzfassung

Die Beurteilung der Leistungsfähigkeit von nichtwassermischbaren Kühlschmierstoffen erfolgt im Labor mittels gängiger tribologischer Methoden, wie unter anderem mit dem Verschleißtest nach Brugger oder dem Tapping-Torque-Test. Die Ergebnisse können bislang nicht eindeutig auf Fertigungsprozesse speziell im Bereich Umformen und geometrisch bestimmter Zerspanung, wie Bohren und Reiben, übertragen werden. Das ist damit zu begründen, dass Fertigungsverfahren sich grundlegend in ihren Prozessgrößen von Laborbeanspruchungen unterscheiden. Zusätzlich spielen auch die Werkstoffe, Werkzeuge und Umweltfaktoren eine entscheidende Rolle. Die hier vorgestellten Untersuchungen zeigen, dass eine Übertragung der im Labor ermittelten Leistungsfähigkeit von Kühlschmierstoffen auf bestimmte Verfahren wie z. B. das Gewindeformen bedingt möglich ist, wenn der identische Werkstoff (100Cr6) verwendet wird. Beim Reiben konnte bezüglich der Additivpaarung Polysulfid und überbasischem Natriumsulfonat nachgewiesen werden, dass die Prozesstemperatur und -kräfte von der verwendeten Zusammensetzung abhängig sind, sodass ein steigender Anteil an Polysulfid 40 im Kühlschmierstoff das Reiben begünstigt.
Handling Intrahousehold Correlations in Modeling Travel: Comparison of Hierarchical Models and Marginal Models
Authors: Cools Mario , Moons Elke
Published: August 2016

In this study, the necessity for treating intrahousehold correlation was investigated by analyzing two travel behavior indexes, travel time and travel distance, for three important travel motivations (commuting, shopping, and leisure). Data stemming from the 2010 Belgian National Household Travel Survey were used in the analysis. Two model approaches that accommodated intrahousehold correlation were compared, namely, the generalized linear mixed model (GLMM) and the generalized estimating equation (GEE) model. Both model approaches showed that high levels of intrahousehold correlation were present, and therefore the use of models that took into account intrahousehold correlation was strongly recommended. Results indicated that this requirement was the most urgent for noncommuting trips. Moreover, the results showed that the GLMM and the GEE model yielded comparable estimates in the case of normally distributed data. Furthermore, evidence was provided that the more the estimates of the intrahousehold correlation provided by the two approaches differed, the less the homogeneity of the parameters was ensured. In this regard, if one has to choose between the GLMM and the GEE model, the negative consequences of choosing an inappropriate covariance model in the case of GLMM especially favor the selection of the GEE model. Further research is needed to compare the two approaches in the context of nonnormally distributed travel behavior data.
Evaluation of the Metropolitan Transportation Commission’s Climate Initiatives Program
Authors: Ang-Olson Jeffrey , Hom Stefanie , Vogler Ursula , Choe James
Published: August 2016

The Metropolitan Transportation Commission (MTC), the metropolitan planning organization for the San Francisco Bay Area, California, launched the Climate Initiatives Program in 2010 as part of the region’s commitment to reduce greenhouse gas (GHG) emissions from transportation sources. Most of the Climate Initiatives Program funding was allocated to local governments or used by MTC for innovative pilot projects to test the ability to reduce GHG emissions. The results of a comprehensive evaluation of the program are reported. The evaluation covers 16 projects that received a total of $33 million in funding in five project categories: transportation demand management (TDM), safe routes to school, bicycle projects, electric vehicle projects, and other project types. This evaluation differs from many previous studies in that it is based on observed transportation activity before and after each project, with data collected through user surveys and other methods. The evaluation found that projects varied widely in their ability to reduce GHG emissions and in their cost-effectiveness. The largest emission reductions came from a multifaceted TDM program in San Mateo County. The most cost-effective project applied cold in-place recycling to pavement resurfacing in the city of Napa. The evaluation provides valuable information as MTC and its partners seek to fund activities that can help achieve the region’s GHG emission reduction goals.
Aggregate Energy Consumption Model for Electrical Vehicles at Signalized Intersections
Authors: Wu Xinkai , Valera Pedro , Morton Jesse E.
Published: August 2016

Development of an energy-efficient signal control system that minimizes the total electricity usage of all electrical vehicles (EVs) running through intersections has been considered one of the most effective approaches for addressing the EV energy-efficiency problem when EVs gain significant market penetration. The critical first step in developing such a system is to derive an aggregate energy consumption function, which can serve as an objective function for energy-based signal optimization. The research described here addresses this challenge by deriving an aggregate energy consumption model (AECM) for EVs at an intersection. The proposed AECM was developed by integrating an individual EV’s energy consumption model with a simplified car-following model; this described the trajectory of each EV by assuming that its driving maneuvers could be simplified into four phases: cruising, decelerating, idling, and accelerating. The proposed model has been evaluated by using detailed vehicle trajectory data provided by the Next Generation Simulation program. The evaluation results indicated consistency between the energy consumption estimated by the proposed AECM and the disaggregated individual EV’s energy consumption model. The proposed aggregate energy consumption function is expected to be used for searching for an optimal signal control strategy that could minimize total energy consumption at a signalized intersection.
From war to development: Women leading the nation
Authors: Gbowee Leymah
Published: August 2016

Currently we live in very turbulent times. It cannot be more turbulent than last Friday (4 December 2015). The school of my six-year old was having a program, and we decided to go. I had gotten dressed, and I was looking forward to a night out in New York with my husband. Even though it was school related, children were not allowed to attend. And then, I turned on the news and the San Bernardino shooting was unfolding. I sat down to look, and as I was sitting there, I told myself that I did not want to go out again. How long can we watch the news and watch mass killings? How long can we see these things? But what brought it home for me was when my six-year old walked through the door, looked at my husband and me intensely and, watching the news, asked a question that I would never have imagined a six-year old would ask. She looked at the television, looked at us and asked, “Is it ISIL again”?
Women and development in Vietnam: Caught between social tradition and economic globalization
Authors: Thu Hong Khuat
Published: August 2016

Background: In many ways, Vietnam can be considered a representative case in global development debates. It has been presented as a relative success story in many global development discussions since the country has moved into the middle-income category. Moreover, it statistically met many of the indicators included in the Millennium Development Goals, especially the reduction of poverty and, above all, extreme poverty.
Along the Folds: Sea and Spar and Portals Between
Authors: Moulthrop Stuart , Schumaker Justin
Published: August 2016

This article employs the concept of the fold, in part as developed by Deleuze out of Leibniz, as an approach to its own attempt at folding together the discourses of literature and game study. On the game side we consider Portal 2 (2011), and from the literary area, the generative mega-poem ‘Sea and Spar Between’ (2010). Though formally disparate, both texts employ a unit operation of folding, applying to virtual space in the game and to verbal space in the systemic poem. We inquire into how the structure of implication in both cases leads to an irruption of the technological sublime, an encounter with spaces and magnitudes that escape both human and computational reckoning. Drawing on Myers's concept of ‘anti-ness’ as a feature of play, we conclude that further discussion of games and literature, the main concern of cybertextual studies, requires more complex structure than symmetry or zero-sum relations.
Watching Textual Screens Then and Now: Text Movies, Electronic Literature, and the Continuum of Countertextual Practice
Authors: Wingate Steven
Published: August 2016

Contemporary works of electronic literature that focus on the use of moving text are aesthetically related to the text movies that arose in the experimental film community, particularly in the 1960s, and both share much in common with concrete and visual poetry. Though criticism has traditionally placed a barrier between works of electronic literature and cinematic text movies on the basis of their perceived medium (cinema characterised by emulsion and electronic literature characterised by computer code), textual screen works originating from both media utilise similar techniques in the presentation and manipulation of text. Interactivity is potentially a differentiator between electronic literature and cinema, but this distinction is negated by the fact that not all works of electronic literature are interactive (that is, they do not require an interactor in order to function). The increasing digitisation and, to a lesser extent, interactivity of cinema also argues against placing a gap between electronic literature and cinematic works that utilise the textual screen. Text movies, visual poetry, and other digital works featuring moving text can be seen as belonging to the same family; they are united by the aesthetic experience of perceiving them, which derives from a dynamic tension between the act of reading and the act of watching. Taken together, they form a continuum of countertextual practice that involves the destabilisation of reading and the displacement of literary significance away from traditional means of sense-making and towards the use of text-as-objects that do not always achieve the status of language.
Will Love Tear Us Apart: Adapting the Lyrical to the Ludic
Authors: Calleja Gordon
Published: August 2016

This paper gives an insight into the design process of a game adaptation of Joy Division's Love Will Tear Us Apart (1980). It outlines the challenges faced in attempting to reconcile the diverging qualities of lyrical poetry and digital games. In so doing, the paper examines the design decisions made in every segment of the game with a particular focus on the tension between the core concerns of the lyrical work being adapted and established tenets of game design.
C Stocks in Forest Floor and Mineral Soil of Two Mediterranean Beech Forests
Authors: De Marco Anna , Fioretto Antonietta , Giordano Maria , Innangi Michele , Menta Cristina , Papa Stefania , Virzo De Santo Amalia
Published: August 2016

This study focuses on two Mediterranean beech forests located in northern and southern Italy and therefore subjected to different environmental conditions. The research goal was to understand C storage in the forest floor and mineral soil and the major determinants. Relative to the northern forest (NF), the southern forest (SF) was found to produce higher amounts of litterfall (4.3 vs. 2.5 Mg·ha−1) and to store less C in the forest floor (~8 vs. ~12 Mg·ha−1) but more C in the mineral soil (~148 vs. ~72 Mg·ha−1). Newly-shed litter of NF had lower P (0.4 vs. 0.6 mg·g−1) but higher N concentration (13 vs. 10 mg·g−1) than SF. Despite its lower Mn concentration (0.06 vs. 0.18 mg·g−1), SF litter produces a Mn-richer humus (0.32 vs. 0.16 mg·g−1) that is less stable. The data suggest that decomposition in the NF forest floor is limited by the shorter growing season (178 days vs. 238 days) and the higher N concentrations in newly shed litter and forest floor. Differences in C stock in the mineral soil reflect differences in ecosystem productivity and long-term organic-matter accumulation. The vertical gradient of soluble and microbial fractions in the soil profile of SF was consistent with a faster turnover of organic matter in the forest floor and greater C accumulation in mineral soil relative to NF. With reference to regional-scale estimates from Italian National Forest Inventory data, the C stock in the mineral soil and the basal area of Italian beech forests were found to be significantly related, whereas C stock in the forest floor and C stock in the mineral soil were not.
Optimization of Injection Molding Parameters for HDPE/TiO2 Nanocomposites Fabrication with Multiple Performance Characteristics Using the Taguchi Method and Grey Relational Analysis
Authors: Pervez Hifsa , Mozumder Mohammad , Mourad Abdel-Hamid
Published: August 2016

The current study presents an investigation on the optimization of injection molding parameters of HDPE/TiO2 nanocomposites using grey relational analysis with the Taguchi method. Four control factors, including filler concentration (i.e., TiO2), barrel temperature, residence time and holding time, were chosen at three different levels of each. Mechanical properties, such as yield strength, Young’s modulus and elongation, were selected as the performance targets. Nine experimental runs were carried out based on the Taguchi L9 orthogonal array, and the data were processed according to the grey relational steps. The optimal process parameters were found based on the average responses of the grey relational grades, and the ideal operating conditions were found to be a filler concentration of 5 wt % TiO2, a barrel temperature of 225 °C, a residence time of 30 min and a holding time of 20 s. Moreover, analysis of variance (ANOVA) has also been applied to identify the most significant factor, and the percentage of TiO2 nanoparticles was found to have the most significant effect on the properties of the HDPE/TiO2 nanocomposites fabricated through the injection molding process.
Neuroprotective Effects of Methyl 3,4-Dihydroxybenzoate against TBHP-Induced Oxidative Damage in SH-SY5Y Cells
Authors: Cai Liang , Wang Li-Fang , Pan Jun-Ping , Mi Xiang-Nan , Zhang Zheng , Geng Hai-Ju , Wang Jia-Hui , Hu Song-Hui , Zhang Wei , Gao Qin , Wu Wu-Tian , Luo Huan-Min
Published: August 2016

This study investigated the neuroprotective effects of methyl 3,4-dihydroxybenzoate (MDHB) against t-butyl hydroperoxide (TBHP) induced oxidative damage in SH-SY5Y (human neuroblastoma cells) and the underlying mechanisms. SH-SY5Y were cultured in DMEM + 10% FBS for 24 h and pretreated with different concentrations of MDHB or N-acetyl-l-cysteine (NAC) for 4 h prior to the addition of 40 μM TBHP for 24 h. Cell viability was analyzed using the methylthiazolyltetrazolium (MTT) and lactate dehydrogenase (LDH) assays. An annexin V-FITC assay was used to detect cell apoptosis rates. The 2′,7′-dichlorofluorescin diacetate (DCFH-DA) assay was used to determine intracellular ROS levels. The activities of antioxidative enzymes (GSH-Px and SOD) were measured using commercially available kits. The oxidative DNA damage marker 8-OHdG was detected using ELISA. Western blotting was used to determine the expression of Bcl-2, Bax, caspase 3, p-Akt and Akt proteins in treated SH-SY5Y cells. Our results showed that MDHB is an effective neuroprotective compound that can mitigate oxidative stress and inhibit apoptosis in SH-SY5Y cells.
Heavy Metal Contamination in the Surface Layer of Bottom Sediments in a Flow-Through Lake: A Case Study of Lake Symsar in Northern Poland
Authors: Kuriata-Potasznik Angela , Szymczyk Sławomir , Skwierawski Andrzej , Glińska-Lewczuk Katarzyna , Cymes Ireneusz
Published: August 2016

River-lake systems most often behave as hydrographic units, which undergo complex interactions, especially in the contact zone. One such interaction pertains to the role of a river in the dispersal of trace elements carried into and out of a lake. In this study, we aimed to assess the impact of rivers on the accumulation of heavy metals in bottom sediments of natural lakes comprised in postglacial river-lake systems. The results showed that a river flowing through a lake is a key factor responsible for the input of the majority of available fraction of heavy metals (Zn, Mn, Cd and Ni) into the water body and for their accumulation along the flow of river water in the lake. The origin of other accumulated elements were the linear and point sources in catchments. In turn, the Pb content was associated with the location of roads in the direct catchment, while the sediment structure (especially size of fraction and density) could have affected the accumulation of Cr and Zn, which indicated correlations between these metals and fine fraction. Our results suggest that lakes act as filters and contribute to the self-purification of water that flows through them. As a result, the content of most metals in lake sediments showed a decrease by approx. 75% between the upstream (inflow) and downstream (outflow) sections. The increased content of two metals only, such as chromium and cadmium (higher by 2.0 and 2.5 times, respectively, after passing through the lake), was due to the correlation of the metals with fine sand. Both the content and distribution pattern of heavy metals in lake sediments are indicative of the natural response of aquatic ecosystems to environmental stressors, such as pollutant import with river water or climate change. The complex elements creating the water ecosystem of each lake can counteract stress by temporarily removing pollutants such as toxic metals form circulation and depositing them mostly around the delta.
CONSTRAINING THE MOVEMENT OF THE SPIRAL FEATURES AND THE LOCATIONS OF PLANETARY BODIES WITHIN THE AB AUR SYSTEM
Authors: Lomax Jamie R. , Wisniewski John P. , Grady Carol A. , McElwain Michael W. , Hashimoto Jun , Kudo Tomoyuki , Kusakabe Nobuhiko , Okamoto Yoshiko K. , Fukagawa Misato , Abe Lyu , Brandner Wolfgang , Brandt Timothy D. , Carson Joseph C. , Currie Thayne M , Egner Sebastian , Feldt Markus , Goto Miwa , Guyon Olivier , Hayano Yutaka , Hayashi Masahiko , Hayashi Saeko S. , Henning Thomas , Hodapp Klaus W. , Inoue Akio , Ishii Miki , Iye Masanori , Janson Markus , Kandori Ryo , Knapp Gillian R. , Kuzuhara Masayuki , Kwon Jungmi , Matsuo Taro , Mayama Satoshi , Miyama Shoken , Momose Munetake , Morino Jun-Ichi , Moro-Martin Amaya , Nishimura Tetsuo , Pyo Tae-Soo , Schneider Glenn H , Serabyn Eugene , Sitko Michael L. , Suenaga Takuya , Suto Hiroshi , Suzuki Ryuji , Takahashi Yasuhiro H. , Takami Michihiro , Takato Naruhisa , Terada Hiroshi , Thalmann Christian , Tomono Daigo , Turner Edwin L. , Watanabe Makoto , Yamada Toru , Takami Hideki , Usuda Tomonori , Tamura Motohide
Published: August 2016

We present a new analysis of multi-epoch, H-band, scattered light images of the AB Aur system. We use a Monte Carlo radiative transfer code to simultaneously model the system’s spectral energy distribution (SED) and H-band polarized intensity (PI) imagery. We find that a disk-dominated model, as opposed to one that is envelope-dominated, can plausibly reproduce AB Aur’s SED and near-IR imagery. This is consistent with previous modeling attempts presented in the literature and supports the idea that at least a subset of AB Aur’s spirals originate within the disk. In light of this, we also analyzed the movement of spiral structures in multi-epoch H-band total light and PI imagery of the disk. We detect no significant rotation or change in spatial location of the spiral structures in these data, which span a 5.8-year baseline. If such structures are caused by disk–planet interactions, the lack of observed rotation constrains the location of the orbit of planetary perturbers to be >47 au.
RELATIONSHIP BETWEEN CHROMOSPHERIC EVAPORATION AND MAGNETIC FIELD TOPOLOGY IN AN M-CLASS SOLAR FLARE
Authors: Sadykov Viacheslav M , Kosovichev Alexander G , Sharykin Ivan N , Zimovets Ivan V , Dominguez Santiago Vargas
Published: August 2016

Chromospheric evaporation is observed as Doppler blueshift during solar flares. It plays a key role in the dynamics and energetics of solar flares; however, its mechanism is still unknown. In this paper, we present a detailed analysis of spatially resolved multi-wavelength observations of chromospheric evaporation during an M 1.0-class solar flare (SOL2014-06-12T21:12) using data from NASA’s Interface Region Imaging Spectrograph and HMI/SDO (the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory), and high-resolution observations from VIS/NST (the Visible Imaging Spectrometer at the New Solar Telescope). The results show that the averaged over the flare region Fe xxi blueshift of the hot (107 K) evaporating plasma is delayed relative to the C ii redshift of the relatively cold (104 K) chromospheric plasma by about one minute. The spatial distribution of the delays is not uniform across the region and can be as long as two minutes in several zones. Using vector magnetograms from HMI, we reconstruct the magnetic field topology and the quasi-separatrix layer, and find that the blueshift delay regions as well as the Hα flare ribbons are connected to the region of the magnetic polarity inversion line (PIL) and an expanding flux rope via a system of low-lying loop arcades with a height of ≲4.5 Mm. As a result, the chromospheric evaporation may be driven by the energy release in the vicinity of PIL, and has the observed properties due to a local magnetic field topology.
IMPACT OF COSMIC VARIANCE ON THE GALAXY–HALO CONNECTION FOR Lyα EMITTERS
Authors: Mejía-Restrepo Julián E. , Forero-Romero Jaime E.
Published: August 2016

In this paper we study the impact of cosmic variance and observational uncertainties in constraining the mass and occupation fraction,

, of dark matter (DM) halos hosting Lyα-emitting galaxies (LAEs) at high redshift. To this end, we construct mock catalogs from an N-body simulation to match the typical size of observed fields at z = 3.1 (

). In our model a DM halo with mass in the range

can only host one detectable LAE at most. We proceed to explore the parameter space determined by

,

, and

with a Markov Chain Monte Carlo algorithm using the angular correlation function and the LAEs’ number density as observational constraints. We find that the preferred minimum and maximum masses in our model span a wide range

,

followed by a wide range in the occupation fraction

. As a consequence, the median mass, M
50, of all the consistent models has a large uncertainty

. However, we find that the same individual models have a relatively tight

scatter around the median mass

dex. We are also able to show that

is uniquely determined by

, regardless of

. We argue that upcoming large surveys covering at least 25 deg2 should be able to put tighter constraints on

and

through the LAE number density distribution width constructed over several fields of ∼1 deg2.
EXACT RELATIVISTIC NEWTONIAN REPRESENTATION OF GRAVITATIONAL STATIC SPACETIME GEOMETRIES
Authors: Ghosh Shubhrangshu , Sarkar Tamal , Bhadra Arunava
Published: August 2016

We construct a self-consistent relativistic Newtonian analogue corresponding to gravitational static spherical symmetric spacetime geometries, starting directly from a generalized scalar relativistic gravitational action in a Newtonian framework, which gives geodesic equations of motion identical to those of the parent metric. Consequently, the derived velocity-dependent relativistic scalar potential, which is a relativistic generalization of the Newtonian gravitational potential, exactly reproduces the relativistic gravitational features corresponding to any static spherical symmetric spacetime geometry in its entirety, including all the experimentally tested gravitational effects in the weak field up to the present. This relativistic analogous potential is expected to be quite useful in studying a wide range of astrophysical phenomena, especially in strong field gravity.
Hyperacuity Exam Screens for Choroidal Neovascularization in Age-Related Macular Degeneration on a Mobile Device
Authors: Chen Jessica S. , Adelman Ron A.
Published: August 2016

BACKGROUND AND OBJECTIVE:

Timely treatment of age-related macular degeneration (AMD) is integral in improving outcomes. To catch choroidal neovascularization as soon as possible, patients should monitor vision at home. The objective of this study is to explore the Hyperacuity App (HAC) as a screen for progression of disease in AMD.

PATIENTS AND METHODS:

A cross-sectional, single-center study was performed with 33 subjects. Consent was obtained and patient information was protected in accordance with the protocol approved by the Yale Human Research Protection Program. A masked retinal subspecialist then graded the spectral-domain optical coherence tomography (SD-OCT) taken the same day to determine which patients required treatment. Further data about the patient were obtained through chart review.

RESULTS:

The HAC was shown to have 92.3% sensitivity and 61.5% specificity in distinguishing between patients who required treatment and those who did not require treatment.

CONCLUSION:

The HAC is a potential screen for choroidal neovascularization in AMD.

[
Ophthalmic Surg Lasers Imaging Retina
. 2016;47:708–715.]
En Face Spectral-Domain Optical Coherence Tomography for the Diagnosis and Evaluation of Polypoidal Choroidal Vasculopathy
Authors: Kokame Gregg T. , Shantha Jessica G. , Hirai Kelsi , Ayabe Julia
Published: August 2016

BACKGROUND AND OBJECTIVE:

To evaluate the diagnostic capability of en face spectral-domain optical coherence tomography (SD-OCT) in patients with polypoidal choroidal vasculopathy (PCV) diagnosed by indocyanine green angiography (ICGA).

PATIENTS AND METHODS:

A retrospective, consecutive case series of 100 eyes diagnosed with PCV by ICGA were imaged with en face SD-OCT. Evaluation of the PCV complex on en face SD-OCT was performed on the ability to diagnose PCV by the characteristic configuration of the PCV complex and the extent and size of the PCV lesion.

RESULTS:

The PCV complex was better visualized on ICGA in 45 eyes, on en face SD-OCT in 44 eyes, and equally well in 11 eyes. The extent of the PCV complex was larger on en face SD-OCT in 65 eyes, larger on ICGA in 23 eyes, and equal in size in 12 eyes.

CONCLUSION:

En face SD-OCT images the characteristic findings of PCV and provides a noninvasive way to diagnose and treat PCV when ICGA is not available.

[
Ophthalmic Surg Lasers Imaging Retina.
2016;47:737–744.]
Assistive Device for Efficient Intravitreal Injections
Authors: Ullrich Franziska , Michels Stephan , Lehmann Daniel , Pieters Roel S. , Becker Matthias , Nelson Bradley J.
Published: August 2016

Intravitreal therapy is the most common treatment for many chronic ophthalmic diseases, such as age-related macular degeneration. Due to the increasing worldwide demand for intravitreal injections, there exists a need to render this medical procedure more time- and cost-efficient while increasing patient safety. The authors propose a medical assistive device that injects medication intravitreally. Compared to the manual intravitreal injection procedure, an automated device has the potential to increase safety for patients, decrease procedure times, allow for integrated data storage and documentation, and reduce costs for medical staff and expensive operating rooms. This work demonstrates the development of an assistive injection system that is coarsely positioned over the patient's head by the human operator, followed by automatic fine positioning and intravitreal injection through the pars plana. Several safety features, such as continuous eye tracking and iris recognition, have been implemented. The functioning system is demonstrated through ex vivo experiments with porcine eyes.

[
Ophthalmic Surg Lasers Imaging Retina
. 2016;47:752–762.]
Hemorrhagic Occlusive Retinal Vasculitis After First Eye Cataract Surgery Without Subsequent Second Eye Involvement
Authors: Balducci Nicole , Savini Giacomo , Barboni Piero , Ducoli Pietro , Ciardella Antonio
Published: August 2016

A case of monocular postoperative hemorrhagic occlusive retinal vasculitis (HORV) after uncomplicated bilateral cataract surgery is described. HORV is a severe syndrome that leads to painless visual loss after uncomplicated cataract surgery. The same surgical procedure was adopted in both eyes except for the use of intracameral vancomycin, which was injected only in the eye that developed HORV. Diffuse retinal ischemia with vascular sheathing and intraretinal hemorrhages were detected during the fourth postoperative day. Despite treatment, the patient developed severe neovascular glaucoma. This case supports the causative role of vancomycin in the pathogenesis of HORV and suggests avoiding it for chemoprophylaxis.

[
Ophthalmic Surg Lasers Imaging Retina
. 2016;47:764–766.]
Adaptive Optics Imaging in Laser Pointer Maculopathy
Authors: Sheyman Alan T. , Nesper Peter L. , Fawzi Amani A. , Jampol Lee M.
Published: August 2016

The authors report multimodal imaging including adaptive optics scanning laser ophthalmoscopy (AOSLO) (Apaeros retinal image system AOSLO prototype; Boston Micromachines Corporation, Boston, MA) in a case of previously diagnosed unilateral acute idiopathic maculopathy (UAIM) that demonstrated features of laser pointer maculopathy. The authors also show the adaptive optics images of a laser pointer maculopathy case previously reported. A 15-year-old girl was referred for the evaluation of a maculopathy suspected to be UAIM. The authors reviewed the patient's history and obtained fluorescein angiography, autofluorescence, optical coherence tomography, infrared reflectance, and AOSLO. The time course of disease and clinical examination did not fit with UAIM, but the linear pattern of lesions was suspicious for self-inflicted laser pointer injury. This was confirmed on subsequent questioning of the patient. The presence of linear lesions in the macula that are best highlighted with multimodal imaging techniques should alert the physician to the possibility of laser pointer injury. AOSLO further characterizes photoreceptor damage in this condition.

[
Ophthalmic Surg Lasers Imaging Retina
. 2016;47:782–785.]
“No es una crisis, es que ya no te quiero". Humor y protesta en el movimiento 15M
Authors: Romanos Eduardo
Published: August 2016

Este artículo explora la relación entre humor y protesta a través del estudio de la utilización estratégica del humor en el movimiento 15M en Madrid en 2011. El análisis de diversas plataformas (carteles, performances, documentos internos y comunicación en internet) sirve para evaluar el potencial subversivo del humor en relación con la comunicación de reivindicaciones, la organización interna del movimiento, el reclutamiento de activistas y la construcción de identidad colectiva. A nivel teórico, el artículo subraya las ventajas de combinar un enfoque expresivo con otro que entienda el humor como una acción instrumental de los participantes. Los resultados muestran cómo los activistas fueron en buena medida conscientes de una serie de beneficios asociados a la utilización del humor que iban más allá de la propia acción de divertirse y, en consecuencia, organizaron diversas iniciativas con el objetivo de alcanzar esos beneficios.
Trophic ecology of Loricariichthys melanocheilus Reis & Pereira, 2000 (Siluriformes: Loricariidae) in Ibicuí river, southern Brazil
Authors: Zardo Éverton Luís , Behr Everton Rodolfo
Published: August 2016

Aiming to characterize aspects of the trophic ecology of Loricariichthys melanocheilus in the Ibicuí river, bimonthly samples were taken in lotic and lentic ecosystems. Fish were caught and fixed in 10% formalin and dissected for stomach content analysis. Items were identified to the lowest taxonomic level possible. Stomach fullness (SF), repletion index (RI) and intestinal quotient (IQ) were estimated. Diet was assessed by the frequency of occurrence and the volumetric method, combined to obtain a Alimentary index. Feeding activity was analyzed with mean values of SF, RI and vacuity index (VI), which represents the percentage of empty stomachs. These parameters were compared seasonally, spatially, and according to the circadian rhythm. The main items in the trophic spectrum of L. melanocheilus were detritus, sediment, plant organic matter, nematodes, micro crustaceans (Copepoda, Cladocera) and insects (Diptera, Trichoptera, Ephemeroptera and Odonata). No environmental or seasonal variations were found for the consumed items. Feeding activity showed seasonal and environmental variations according to RI but did not significantly change according to SF. The IQ was 1.51, and showed seasonal variations, indicating changes in the diet.
Mild-acid hydrolysis of a native polysulfated fraction from Acanthophora muscoides generates sulfated oligosaccharides displaying in vitro thrombin generation inhibition
Authors: Rodrigues José Ariévilo Gurgel , Queiroz Ismael Nilo Lino de , Quinderé Ana Luíza Gomes , Benevides Norma Maria Barros , Tovar Ana Maria Freire , Mourão Paulo Antônio De Souza
Published: August 2016

A. muscoides (Rhodophyta) has three polysulfated fractions (-1, -2 and Am-3). Am-2 displayed anti-inflammation and serpin-independent anticoagulation effects; however, no effect of oligomers on thrombin-generation (TG) has been demonstrated. This study employed mild-acid hydrolysis to obtain low-molecular-size derivatives from Am-2 and compared in vitro inhibitory effects between intact Am-2 and its hydrolysates on a TG assay. The polysaccharidic extract was fractionated by DEAE-cellulose that revealed Am-2 eluted with 0.75-M NaCl containing sulfate (23%), hexoses (51%) and absence of proteins, and indicating, by one-dimension nuclear magnetic resonance, structure of galactan similar to that of the extract. The depolymerization with HCl (0.02 or 0.04-M, 60°C) for different times progressively reduced the charge density and the molecular-size of Am-2 based on electrophoresis in agarose and polyacrylamide gels, respectively, where at higher acid concentration and critical time up to 5h yielded fragment of  ̴ 14-kDa similar to that of unfractionated heparin (UHEP). Regarding the TG assay, intact Am-2 inhibited concentration-dependent intrinsic pathway, whereas its hydrolysates abolished it like UHEP, except the analog fragment (92.87% inhibition), when in 60-fold diluted human plasma using chromogenic method in a continuous system. The results reveal an alternative approach for the production of oligosaccharides from A. muscoides with TG inhibition.
Conhecimentos dos docentes do 1º ciclo do ensino básico sobre o transtorno do déficit de atenção com hiperatividade
Authors: Cruz Eduardo Chaves , Brito Cecilia Mendes Espinho
Published: August 2016

O Transtorno do Déficit de Atenção com Hiperatividade (TDAH) é um transtorno neurocomportamental que se caracteriza por padrões persistentes e níveis inadequados de desatenção e/ou hiperatividade-impulsividade. É o transtorno mais frequente em idade escolar, pelo que se torna pertinente que o professor saiba intervir adequadamente, recorrendo a estratégias educativas e comportamentais apropriadas, tendo em vista o sucesso acadêmico e a integração social. Atualmente, o TDAH é provavelmente o transtorno da infância mais estudado e com o qual os docentes do 1.º Ciclo mais se debatem no seu quotidiano. Neste estudo, com o objetivo de identificar os conhecimentos que os docentes do 1.º Ciclo do Ensino Básico possuem sobre esse transtorno e qual a influência da experiência profissional na avaliação que eles fazem do seu conhecimento, elaborou-se e aplicou-se um questionário a uma amostra de duzentos e cinquenta docentes. Os resultados obtidos evidenciam que, na generalidade, os docentes, apesar de já terem trabalhado com crianças com TDAH, consideram o seu conhecimento satisfatório, revelando a necessidade de uma maior formação nesta área.
Do global ao local: a implantação das políticas de responsabilização docente, gestão gerencial e avaliação por resultados
Authors: Santos Fabiano Antonio dos
Published: August 2016

Este artigo analisa os impactos da internacionalização das políticas educacionais sobre os professores, diretores e equipe pedagógica de uma escola municipal de Curitiba. Este fenômeno está relacionado à intensificação da produção e adoção de termos/conceitos amplamente difundidos e aceitos pela maioria dos sujeitos que atuam naquela escola. As novas estratégias para a elaboração das políticas deste século visam tornar a escola local privilegiado para a produção do consenso. Nesta etapa das políticas, fica evidente que o atendimento às demandas necessárias ao desenvolvimento capitalista guia a formulação das políticas educativas, minando as possibilidades de enfrentar os problemas da escola a partir do mais urgente. Por meio de pesquisa empírica, que contou com procedimentos de observação participante, entrevistas semiestruturadas e análise de documentos, foi possível analisar a implementação do Plano de Desenvolvimento da Escola (PDE-Escola) e sua relação com os aspectos mais gerais da internacionalização das políticas educacionais. O PDE-Escola recomenda estratégias às escolas que as levam a se responsabilizar pelos resultados obtidos nas avaliações de desempenho, a desenvolver práticas de gestão gerencialista, a não realizar discussões ampliadas com o grupo de professores pela falta de tempo necessário para tal atividade.
Artes do fazer e usos do saber no império romano: ‘lendo’ os mosaicos de Antioquia
Authors: Silva Gilvan Ventura da
Published: August 2016

Neste artigo, pretendemos desenvolver algumas reflexões acerca do mosaico romano como techné ou ars, ou seja, como uma técnica de decoração de interiores que comportava um alto nível de especialização. Uma vez estabelecidos, em linhas gerais, os procedimentos empregados na confecção dos mosaicos, buscaremos, em seguida, demonstrar como determinada técnica, uma maneira particular de manipulação de materiais rústicos dominada por indivíduos semiletrados cuja memória praticamente se perdeu, é mobilizada com a finalidade de exprimir temas e motivos conectados com a paideia, a formação cultural superior concedida aos membros da elite greco-romana. Como estudo de caso, tomaremos dois mosaicos encontrados na assim denominada Casa de Menandro, uma villa situada no distrito de Dafne, ao sul de Antioquia. Ambos os mosaicos datam da segunda metade do século III.