bluuebunny/crossref_metadata_2025 huggingface dataset:
Consumer Purchase Intentions for Sustainable Wild Salmon in the Chinese Market and Implications for Agribusiness Decisions
Authors: Zheng Qiujie , Wang H. Holly , Lu Yonggang
Published: April 2018

Sustainable food consumption and production play an increasingly important role in improving food security and quality in the food system worldwide. Consumers’ food consumption patterns in China, a rapidly emerging economy with the largest population and one of the largest consumer markets in the world, significantly influence the structure of global trade flows and the sustainable ecosystem and environment. In this paper, we assess the emerging demand for imported wild and sustainable Alaskan salmon fillet and varietal parts in China’s market through consumers’ stated purchase intentions for the products. We use an ordered logit model to link consumers’ purchase intentions with potential influencing factors and identify important factors, including consumers’ consumption habits, perceptions, and social demographic characteristics. Due to differences between western and Chinese consumers on how different parts of fish are consumed, seemingly low-value salmon heads and bones may carry significant value if being imported and sold to Chinese consumers. We believe that our study is an important step in helping to build a sustainable business model, thereby creating a win-win situation for both the importing and exporting countries in order to allocate resources efficiently, feed people with healthy food, avoid food waste, and fulfill the economic value of products.
OGLE-2017-BLG-1522: A Giant Planet around a Brown Dwarf Located in the Galactic Bulge
Authors: Jung Y. K. , Udalski A. , Gould A. , Ryu Y.-H. , Yee J. C. ,   and, Han C. , Albrow M. D. , Lee C.-U. , Kim S.-L. , Hwang K.-H. , Chung S.-J. , Shin I.-G. , Zhu W. , Cha S.-M. , Kim D.-J. , Lee Y. , Park B.-G. , Lee D.-J. , Kim H.-W. , Pogge R. W. ,   (The KMTNet Collaboration), Szymański M. K. , Mróz P. , Poleski R. , Skowron J. , Pietrukowicz P. , Soszyński I. , Kozłowski S. , Ulaczyk K. , Pawlak M. , Rybicki K. ,   (The OGLE Collaboration)
Published: April 2018

We report the discovery of a giant planet in the OGLE-2017-BLG-1522 microlensing event. The planetary perturbations were clearly identified by high-cadence survey experiments despite the relatively short event timescale of t
E ∼ 7.5 days. The Einstein radius is unusually small, θ
E = 0.065 mas, implying that the lens system either has very low mass or lies much closer to the microlensed source than the Sun, or both. A Bayesian analysis yields component masses

and source-lens distance

, implying that this is a brown-dwarf/Jupiter system that probably lies in the Galactic bulge, a location that is also consistent with the relatively low lens-source relative proper motion μ = 3.2 ± 0.5 mas yr−1. The projected companion-host separation is

, indicating that the planet is placed beyond the snow line of the host, i.e., a

sl
 ∼ 0.12 au. Planet formation scenarios combined with the small companion-host mass ratio q ∼ 0.016 and separation suggest that the companion could be the first discovery of a giant planet that formed in a protoplanetary disk around a brown-dwarf host.
VLBA Observations of Strong Anisotripic Radio Scattering Toward the Orion Nebula
Authors: Kounkel Marina , Hartmann Lee , Loinard Laurent , Mioduszewski Amy J. , Rodríguez Luis F. , Ortiz-León Gisela N. , Johnson Michael D. , Torres Rosa M. , Briceño Cesar
Published: April 2018

We present observations of VLBA 20, a radio source found toward the edge of the Orion Nebula Cluster (ONC). Nonthermal emission dominates the spectral energy distribution of this object from the radio to mid-infrared regime, suggesting that VLBA 20 is extragalactic. This source is heavily scattered in the radio regime. Very Long Baseline Array observations resolve it to ∼34 × 19 mas at 5 GHz, and the wavelength dependence of the scattering disk is consistent with ν
−2 at other frequencies. The origin of the scattering is most likely the ionized X-ray emitting gas from the winds of the most massive stars of the ONC. The scattering is highly anisotropic, with the axis ratio of 2:1, higher than what is typically observed toward other sources.
The Feasibility and Benefits of In Situ Exploration of ‘Oumuamua-like Objects
Authors: Seligman Darryl , Laughlin Gregory
Published: April 2018

A rapid accumulation of observations and interpretation has followed in the wake of 1I ‘Oumuamua’s passage through the inner solar system. We briefly outline the consequences that this first detection of an interstellar asteroid implies for the planet-forming process, and we assess the near-term prospects for detecting and observing (both remotely and in situ) future solar system visitors of this type. Drawing on detailed heat-transfer calculations that take both ‘Oumuamua’s unusual shape and its chaotic tumbling into account, we affirm that the lack of a detectable coma in deep images of the object very likely arises from the presence of a radiation-modified coating of high molecular weight material (rather than a refractory bulk composition). Assuming that ‘Oumuamua is a typical representative of a larger population with a kinematic distribution similar to Population I stars in the local galactic neighborhood, we calculate expected arrival rates, impact parameters, and velocities of similar objects and assess their prospects for detection using operational and forthcoming facilities. Using ‘Oumuamua as a proof of concept, we assess the prospects for missions that intercept interstellar objects using conventional chemical propulsion. Using a “launch on detection” paradigm, we estimate wait times of order of 10 years between favorable mission opportunities with the detection capabilities of the Large-scale Synoptic Survey Telescope, a figure that will be refined as the population of interstellar asteroids becomes observationally better constrained.
The Stellar Populations of Two Ultra-diffuse Galaxies from Optical and Near-infrared Photometry
Authors: Pandya Viraj , Romanowsky Aaron J. , Laine Seppo , Brodie Jean P. , Johnson Benjamin D. , Glaccum William , Villaume Alexa , Cuillandre Jean-Charles , Gwyn Stephen , Krick Jessica , Lasker Ronald , Martín-Navarro Ignacio , Martinez-Delgado David , van Dokkum Pieter
Published: April 2018

We present observational constraints on the stellar populations of two ultra-diffuse galaxies (UDGs) using optical through near-infrared (NIR) spectral energy distribution (SED) fitting. Our analysis is enabled by new Spitzer-IRAC 3.6 and 4.5 μm imaging, archival optical imaging, and the prospector fully Bayesian SED fitting framework. Our sample contains one field UDG (DGSAT I), one Virgo cluster UDG (VCC 1287), and one Virgo cluster dwarf elliptical for comparison (VCC 1122). We find that the optical–NIR colors of the three galaxies are significantly different from each other. We infer that VCC 1287 has an old (≳7.7 Gyr) and surprisingly metal-poor ([Z/Z
⊙] ≲ −1.0) stellar population, even after marginalizing over uncertainties on diffuse interstellar dust. In contrast, the field UDG DGSAT I shows evidence of being younger than the Virgo UDG, with an extended star formation history and an age posterior extending down to ∼3 Gyr. The stellar metallicity of DGSAT I is sub-solar but higher than that of the Virgo UDG, with

in the case of exactly zero diffuse interstellar dust, DGSAT I may even have solar metallicity. With VCC 1287 and several Coma UDGs, a general picture is emerging where cluster UDGs may be “failed” galaxies, but the field UDG DGSAT I seems more consistent with a stellar feedback-induced expansion scenario. In the future, our approach can be applied to a large and diverse sample of UDGs down to faint surface brightness limits, with the goal of constraining their stellar ages, stellar metallicities, and circumstellar and diffuse interstellar dust content.
Examining the High-energy Radiation Mechanisms of Knots and Hotspots in Active Galactic Nucleus Jets
Authors: Zhang Jin , Du Shen-shi , Guo Sheng-Chu , Zhang Hai-Ming , Chen Liang , Liang En-Wei , Zhang Shuang-Nan
Published: April 2018

We compile the radio–optical–X-ray spectral energy distributions (SEDs) of 65 knots and 29 hotspots in 41 active galactic nucleus jets to examine their high-energy radiation mechanisms. Their SEDs can be fitted with the single-zone leptonic models, except for the hotspot of Pictor A and six knots of 3C 273. The X-ray emission of 1 hotspot and 22 knots is well explained as synchrotron radiation under the equipartition condition; they usually have lower X-ray and radio luminosities than the others, which may be due to a lower beaming factor. An inverse Compton (IC) process is involved for explaining the X-ray emission of the other SEDs. Without considering the equipartition condition, their X-ray emission can be attributed to the synchrotron-self-Compton process, but the derived jet powers (P
jet) are not correlated with L
k and most of them are larger than L
k, with more than three orders of magnitude, where L
k is the jet kinetic power estimated with their radio emission. Under the equipartition condition, the X-ray emission is well interpreted with the IC process for the cosmic microwave background photons (IC/CMB). In this scenario, the derived P
jet of knots and hotspots are correlated with and comparable to L
k. These results suggest that the IC/CMB model may be a promising interpretation of the X-ray emission. In addition, a tentative knot–hotspot sequence in the synchrotron peak-energy–peak-luminosity plane is observed, similar to the blazar sequence, which may be attributed to the different cooling mechanisms of electrons.
High-resolution Hydrodynamic Simulation of Tidal Detonation of a Helium White Dwarf by an Intermediate Mass Black Hole
Authors: Tanikawa Ataru
Published: April 2018

We demonstrate tidal detonation during a tidal disruption event (TDE) of a helium (He) white dwarf (WD) with 0.45 M
⊙ by an intermediate mass black hole using extremely high-resolution simulations. Tanikawa et al. have shown tidal detonation in results of previous studies from unphysical heating due to low-resolution simulations, and such unphysical heating occurs in three-dimensional (3D) smoothed particle hydrodynamics (SPH) simulations even with 10 million SPH particles. In order to avoid such unphysical heating, we perform 3D SPH simulations up to 300 million SPH particles, and 1D mesh simulations using flow structure in the 3D SPH simulations for 1D initial conditions. The 1D mesh simulations have higher resolutions than the 3D SPH simulations. We show that tidal detonation occurs and confirm that this result is perfectly converged with different space resolution in both 3D SPH and 1D mesh simulations. We find that detonation waves independently arise in leading parts of the WD, and yield large amounts of 56Ni. Although detonation waves are not generated in trailing parts of the WD, the trailing parts would receive detonation waves generated in the leading parts and would leave large amounts of Si group elements. Eventually, this He WD TDE would synthesize 56Ni of 0.30 M
⊙ and Si group elements of 0.08 M
⊙, and could be observed as a luminous thermonuclear transient comparable to SNe Ia.
Electron Spectral Breaking Caused by Magnetic Reconnection in Impulsive Flare Events
Authors: Tan Lun C.
Published: April 2018

Using data from the Wind/3D Plasma and Energetic Particle (3DP) instrument, we have analyzed the energy spectral difference of low-energy electrons between the “impulsive” and “gradual” solar energetic particle (SEP) events during solar cycle 23. Since simulations reveal that in the exhaust of magnetic reconnection sites, electrons could form a beam structure in which the parallel speed is limited by the electron Alfvén speed (V
Ae), their spectral steepening should be observable at the electron energy E
e, corresponding to V
Ae. In addition, the analysis of transversely oscillating coronal loops shows that in the loop-top region, where the reconnection site is located, V
Ae corresponds to E
e < 15 keV. We hence search for the spectral steepening of electrons in this E
e range. In our search we have taken the effect of local particle acceleration at reconnecting current sheets into consideration. The effect may occur in the solar wind and impact the observed time-intensity profiles of SEPs. Our analysis shows that in the impulsive flare event, the electron spectral steepening occurs at E
e = 7 ± 2 keV, whereas no steepening is seen in the gradual event. Therefore, the comparison between the impulsive and gradual SEP event lists provided by this work could be important for future investigations of particle acceleration in the corona and the solar wind.
High-resolution Near-IR Spectral Mapping with H2 and [Fe ii] Lines of Multiple Outflows around LkHα 234
Authors: Oh Heeyoung , Pyo Tae-Soo , Koo Bon-Chul , Yuk In-Soo , Kaplan Kyle F. , Lee Yong-Hyun , Sokal Kimberly R. , Mace Gregory N. , Park Chan , Lee Jae-Joon , Park Byeong-Gon , Hwang Narae , Kim Hwihyun , Jaffe Daniel T.
Published: April 2018

We present a high-resolution, near-IR spectroscopic study of multiple outflows in the LkHα 234 star formation region using the Immersion GRating INfrared Spectrometer (IGRINS). Spectral mapping over the blueshifted emission of HH 167 allowed us to distinguish at least three separate, spatially overlapped outflows in H2 and [Fe ii] emission. We show that the H2 emission represents not a single jet but rather complex multiple outflows driven by three known embedded sources: MM1, VLA 2, and VLA 3. There is a redshifted H2 outflow at a low velocity, V
LSR <+50 km s−1, with respect to the systemic velocity of V
LSR = −11.5 km s−1, that coincides with the H2O masers seen in earlier radio observations 2″ southwest of VLA 2. We found that the previously detected [Fe ii] jet with

100 km s−1 driven by VLA 3B is also detected in H2 emission and confirm that this jet has a position angle of about 240°. Spectra of the redshifted knots at 14″–65″ northeast of LkHα 234 are presented for the first time. These spectra also provide clues to the existence of multiple outflows. We detected high-velocity (50–120 km s−1) H2 gas in the multiple outflows around LkHα 234. Since these gases move at speeds well over the dissociation velocity (>40 km s−1), the emission must originate from the jet itself rather than H2 gas in the ambient medium. Also, position–velocity and excitation diagrams indicate that emission from knot C in HH 167 comes from two different phenomena, shocks and photodissociation.
Three new species of Grouvellinus Champion, 1923 from Maliau Basin, Sabah, Borneo, discovered by citizen scientists during the first Taxon Expedition (Insecta, Coleoptera, Elmidae)
Authors: Freitag Hendrik , Pangantihon Clister V. , Njunjić Iva
Published: April 2018

Further results are presented of the first field course at Maliau Basin, Malaysian Borneo organized by Taxon Expeditions, an organization which enables citizen scientists to be directly involved in taxonomic discoveries. Three new species of the aquatic beetle genus Grouvellinus Champion, 1923, namely G.leonardodicaprioi sp. n., G. andrekuipersi sp. n., and G.quest sp. n. were collected jointly by the citizen scientists and taxonomists during the fieldwork in Maliau Basin. Material was mainly sampled from sandstone bottom rocks of blackwater streams at altitudes between 900 m and 1,000 m using fine-meshed hand-nets. The genus is widely distributed in the Oriental and Palearctic regions, but these are the first records from the island of Borneo.
L’hétérarchie de l’intellect général
Authors: Krasavin Igor
Published: April 2018

Cet article élabore le problème de la structure de l’Intellect Général, dont la théorie se développe dans le mouvement intellectuel post-opéraiste. Synonyme de la capacité cognitive de la société, qui peut soit ouvrir la voie d’une libération, soit être exploité par le capitalisme, l’Intellect Général est à la fois une capacité de la société à analyser, à poser des objectifs et à produire, et un corps virtuel composé topologiquement par les connexions sociales entre « la multitude de singularités corporelles ». Ici l’Intellect G é n é ral est analysé comme une propriété de cette structure de connexion sociale, nommée comme l’hétérarchie. L’hétérarchie est un ensemble, dont les différentes parties se lient comme autant d’ensembles singuliers et contribuent à ses changements, sans pouvoir être réduites à un système de valeurs unique, transitif et cohérent. L’argument principal de cet article est que, si l’Intellect G é n é ral peut dénoter la capacité auto-organisationnelle de la société, il est impossible de l’identifier avec une organisation institutionnelle unique ou avec un régime politique cohérent et englobant.
Relationship of Blood Metal Ion Levels and Leukocyte Profiles in Patients With Articular Surface Replacement Metal-on-Metal Hip Replacement
Authors: Markel David C. , Bergum Christopher , Flynn Jeffrey , Jackson Nancy , Bou-Akl Therese , Ren Weiping
Published: April 2018

The purpose of this study was to compare blood leukocyte profiles and metal ion concentrations between hip resurfacing arthroplasty (articular surface replacement) patients with and without revision. A total of 25 articular surface replacement patients were recruited (10 with stable implants and 15 undergoing revision). Blood concentrations of chromium (Cr) and cobalt (Co) were measured. Flow cytometry was used to quantify the subpopulations of leukocytes, including CD14+monocytes, CD16+monocytes, CD3+T-lymphocytes, CD19+B-lymphocytes, CD4+helper T-cells, and CD45+RA memory vs naïve T-cells. Patients undergoing revision had higher blood Co (mean, 10.85 µg/L) and Cr (mean, 3.19 µg/L) levels than patients with stable implants (mean Co, 3.06 µg/L; mean Cr, 1.07 µg/L) (P<.05). The number of CD4+helper T-cells was higher in patients with stable implants (mean, 842±311 cells/µL) than in patients undergoing revision (mean, 591±208 cells/µL) (P<.05). There was a significant association between total metal ion levels (Co+Cr) and the number of CD14+monocytes (P=.045) and inflammatory CD16+monocytes (P=.046). The authors observed that the increase in blood metal ions was associated with an increase in CD16+monocytes. They believe that continued analysis of blood leukocyte profiles may be helpful in defining differences among failed articular surface replacement, stable articular surface replacement, and failed metal-on-polyethylene implants. [Orthopedics.2018; 41(3):e424–e431.]
Longer Operative Time Is Associated With Increased Adverse Events After Anterior Cervical Diskectomy and Fusion: 15-Minute Intervals Matter
Authors: Ondeck Nathaniel T. , Bohl Daniel D. , McLynn Ryan P. , Cui Jonathan J. , Bovonratwet Patawut , Singh Kern , Grauer Jonathan N.
Published: April 2018

Little is known about the impact of operative time, as an independent and interval variable, on general health perioperative outcomes following anterior cervical diskectomy and fusion. Therefore, patients undergoing a 1-level anterior cervical diskectomy and fusion were identified in the American College of Surgeons National Surgical Quality Improvement Program. Operative time (as an interval variable) was tested for association with perioperative outcomes using a multivariate regression that was adjusted for differences in baseline characteristics. A total of 15,241 patients were included. Increased surgical duration was consistently correlated with a rise in any adverse event postoperatively, with each additional 15 minutes of operating time raising the risk for having any adverse event by an average of 10% (99.64% confidence interval, 3%–17%,
P
<.001). In fact, 15-minute increases in surgical duration were associated with incremental increases in the rates of venous thromboembolism, sepsis, unplanned intubation, extended length of hospital stay, and hospital readmission. Greater operative time, despite controlling for other patient variables, increases the risk for overall postoperative adverse events and multiple individual adverse outcomes. This increased risk may be attributed to anesthetic effects, physiologic stresses, and surgical site issues. Although it is difficult to fully isolate operative time as an independent variable because it may be closely related to the complexity of the surgical pathology being addressed, the current study suggests that surgeons should maximize operative efficiency as possible (potentially using strategies that have been shown to improve operative time in the 15-minute magnitude), without compromising the technical components of the procedure. [
Orthopedics.
2018; 41(4):e483–e488.]
Preoperative Vitamin D Deficiency Is Associated With Higher Postoperative Complication Rates in Total Knee Arthroplasty
Authors: Hegde Vishal , Arshi Armin , Wang Christopher , Buser Zorica , Wang Jeffrey C. , Jensen Andrew R. , Adams John S. , Zeegen Erik N. , Bernthal Nicholas M.
Published: April 2018

The purpose of this study was to determine the relative incidence of postoperative complications in 25-hydroxyvitamin D (25D)-deficient and -sufficient patients undergoing total knee arthroplasty (TKA). Patients who were either serum 25D deficient (25D <20 ng/mL) or 25D sufficient (25D ≥20 ng/mL) 90 days prior to primary TKA from 2007 to 2016 were identified using the Humana administrative claims registry. The incidence of postoperative medical and surgical complications was determined by querying for relevant
International Classification of Diseases, Ninth Revision
and
Current Procedural Terminology
codes. Risk-adjusted odds ratios (ORs) were calculated using multivariate logistic regression with age, sex, and Charlson Comorbidity Index as covariates. In total, 868 of 6593 patients who underwent TKA from 2007 to 2016 were 25D deficient, corresponding to a 13.2% prevalence rate. On adjustment for age, sex, and Charlson Comorbidity Index, 25D-deficient patients had a higher incidence of postoperative stiffness requiring manipulation under anesthesia (OR, 1.69; 95% confidence interval [CI], 1.39–2.04;
P
<.001), surgical site infection requiring irrigation and debridement (OR, 1.76; 95% CI, 1.25–2.48;
P
=.001), and prosthesis explantation (OR, 2.97; 95% CI, 2.04–4.31;
P
<.001) at 1 year. Patients who were 25D deficient also had higher rates of postoperative deep venous thrombosis (OR, 1.80; 95% CI, 1.36–2.38;
P
<.001), myocardial infarction (OR, 2.11; 95% CI, 1.41–3.15;
P
<.001), and cerebrovascular accident (OR, 1.73; 95% CI, 1.17–2.57;
P
=.006). Thus, serum 25D levels below 20 ng/mL are associated with a higher incidence of postoperative complications and may be a perioperative modifiable risk factor in TKA. [
Orthopedics
. 2018; 41(4):e489–e495.]
Medial Compartment Decompression by Proximal Fibular Osteotomy: A Biomechanical Cadaver Study
Authors: Baldini Todd , Roberts Jesse , Hao Jiandong , Hunt Kenneth , Dayton Michael , Hogan Craig
Published: April 2018

Medial compartment knee osteoarthritis is a painful and debilitating disease. A proximal fibular osteotomy is a novel, simple surgical technique that may reduce pain and improve function for patients with osteoarthritis. The purpose of this biomechanical cadaver study was to determine what effect proximal fibular osteotomy had on knee joint and ankle pressures and tibia strain. Ten matched pairs of cadaver legs were tested in compression to 1.1 times body weight comparing intact and with proximal fibular osteotomy at 0°, 15°, and 30° of flexion. Sensors were inserted into the knee and ankle joint to measure pressure, force, and contact area. Strain was measured with a strain gage on the anterior medial tibia. In the medial compartment, the peak force, contact area, and pressure all decreased from intact to after fibular osteotomy, with significant differences at 15° of flexion (
P
<.05). There were no significant differences in the lateral compartment for any measures. In the ankle joint, the peak force and pressure decreased from intact to after fibular osteotomy at all 3 flexion angles. There were no significant changes in strain in the tibia. Proximal fibular osteotomy decreases the pressure in the medial compartment of the knee, which may reduce knee pain and improve function in patients with medial compartment knee osteoarthritis. [
Orthopedics.
2018; 41(4):e496–e501.]
Immediate Postoperative Alignment Measurements as a Predictor of Alignment Stability in Fixed Suture Strabismus Surgery
Authors: Boente Charline S. , Jardine Griffin J. , Damarjian Tina G. , Sprunger Derek T. , Roberts Gavin J. , Neely Daniel E. , Haider Kathryn M. , Plager David A.
Published: April 2018

Purpose:

To evaluate the use of immediate postoperative alignment measurements as a predictor of future alignment stability in fixed suture strabismus surgery.

Methods:

Forty-seven patients were prospectively evaluated after undergoing horizontal or vertical rectus muscle surgery using a fixed suture technique. Alignment measurements were taken approximately 1 hour, 1 to 3 weeks, and 2 to 3 months postoperatively. A Spearman correlation coefficient was used to compare measurements from the immediate postoperative period to the 2- to 3-month postoperative period. Patients with dissociated strabismus, only oblique muscle surgery, or poor vision in one or both eyes precluding precise alternate cover test were excluded.

Results:

Mean age of all patients was 46.7 years (range: 12 to 86 years). Twenty-two patients underwent surgery for exotropia: 19 for esotropia and 6 for hypertropia. Mean alignment for all surgeries was 2 prism diopters (PD) undercorrection in the immediate postoperative period, which was similar to the mean of 4.6 PD undercorrection at 2 to 3 months postoperatively. However, the Spearman correlation between the immediate postoperative and 2- to 3-month postoperative measurements was 0.18 for all surgeries, 0.03 for exotropia, 0.56 for esotropia, and 0.40 for hypertropia. The overall success rate, defined as 8 PD or less of horizontal deviation and 4 PD or less of vertical deviation, was 77% at 2 to 3 months postoperatively.

Conclusions:

The relationship between immediate postoperative alignment and future alignment stability in fixed suture strabismus surgery has not been previously defined. The current study demonstrated that although the surgical success rate was reasonably good, poor correlation occurred between the alignment immediately postoperatively and 2 to 3 months postoperatively.

[
J Pediatr Ophthalmol Strabismus
. 2018;55(4):240–244.]
A Comparison Between Moodle, Facebook, and Paper-based Assessment Tools: Students’ Perception of Preference and Effect on Performance
Authors: Jeljali Riadh , Al Naji Loay , Khazam Khzim
Published: April 2018

Literature abounds with research on the benefits of technology and its effect on students’ performance and satisfaction. The use of Learning Management Systems (LMS) such as blackboard, eCollege, Moodle and others are being used throughout the educational sector. Some even incorporate such technology to measure teaching effectiveness and student performance. Furthermore, social websites, like Facebook.com, have become so popular that 85 to 99% of college students use it in one form or another (Hargittai, 2007; Jones & Fox, 2009; Matney & Borland, 2009). This research explores the students’ perspective on how the effectiveness of tools such as Moodle and Facebook.com as well as paper based learning (traditional learning) on their performance. The paper also looks at different factors, such as gender, major type and age to try to shed light on the preferred tool among students to use for education. When it comes to students’ tool preference based on age and gender, we found no significant difference but when looking at students’ majors and time spent in university, we found that Moodle was rated the top, followed by paper-based learning, then Facebook. When viewing students’ perception on effect of these tools on performance, we found no statistical significant difference by age or time spent in the university but did find a significant difference among different genders; where male students showed greater satisfaction than did female students, and statistical significant different among majors.
An Investigation of the Social Network System Competencies of High School Students in Japan
Authors: Yoshida Masami
Published: April 2018

We investigated the Social Network System (SNS) competencies of high school students in Japan. Student groups (from cities or regional areas) and the opinions of their teachers were compared. Twenty-five UNESCO criteria in three competency categories were selected. By two-way analysis of variance and paired-comparisons, we detected a significant difference in the opinions of students and teachers. Although the magnitude of the difference was small, by Dunnett’s multiple comparisons, the city and regional groups also differed from each other. Performance criteria items of risk awareness were valued the highest and most important in all groups; whereas technical skills and socio-cultural skills were reported as less proficient and less important by all groups. Classification of SNS-type was used, and the data of SNS sites with which the students were familiar and the mean values of related performance criteria items were applied to view the situation of students. By this approach, we confirmed that students are savvy in navigating socializing SNSs. Based on our findings, we propose important learning and societal-public activities relevant to SNSs.
Social Factors Influence on Career Choices for Female Computer Science Students
Authors: Malik Sohail Iqbal , Al-Emran Mostafa
Published: April 2018

The low and shrinking numbers of female students studying computer science is a well-known problem in most of the western countries. The dominant perception about computer science field considered it as a masculine domain. In contrast, this study was performed in the IT department where female students are dominant compared to male students. The purpose of this study is to explore the influence of different factors on female students in choosing a career in the IT field. A survey was deployed to collect responses of female students in the IT department. The results show that female students are interested in computer science stream and nullify the dominant perception of computer science as a masculine domain. They want to learn technology, become an active member of the digital native world, and interested in coding literacy.
Construction of SOA Based VR Technology in Animation Teaching
Authors: Qin Zhenyan , Tao Zonghua
Published: April 2018

3D animation production is an animation course widely set up in colleges currently aiming at cultivating 3D animation production talents. But in actual teaching, there exist problems of teaching practice not prominent, teaching not intuitive, and students’ learning interest not strong. Based on this condition, this paper plans to use SOA design and VR technology in teaching system design with the help of good information integration, service integration function of SOA design and advantages of VR technology of directly and dynamically reflecting object forms so as to improve teaching interestingness and intuition, help students to increase knowledge and improve teaching quality in relaxed atmosphere. At last, this paper has conducted teaching effect comparison experiments which show that the virtual teaching system designed and developed in this paper can improve students’ learning activity, teacher-student communication and obtain better teaching effect
Construction of the Multimedia Teaching Platform of Cost Accounting Course Based on EXCEL VBA Program
Authors: Zhang Zhiyong
Published: April 2018

there exit some problems in domestic multimedia teaching of “Cost Accounting” course such as the difficulties of achieving teaching objectives and teaching effect, slow control loading, data missing in excel saving page, and data leakage risk, etc. Thus this paper has constructed a multi-media teaching platform for “Cost Accounting” course based on Excel VBA technology. Firstly, the paper has elaborated the theoretical foundation of constructing “Cost Accounting” course multimedia teaching platform. Then the paper has elaborated the methods and procedures of constructing “Cost Accounting” course multimedia teaching platform based on Excel VBA, and displayed the construction results. In addition, the paper has innovatively applied the technology of webpage remote processing classroom Excel. In the end, the paper has applied and verified the teaching effect of the platform in practical teaching. The result shows that the multi-media teaching platform constructed in this paper has greatly improved the teaching effect of“Cost Accounting” course.
Construction of the Network Learning Platform for the Course Building Space Transformation based on Grid
Authors: Zhu Chen
Published: April 2018

It is a development trend to build a network learning platform for the current university course teaching, but universities or colleges can’t share the learning information with each other effectively. Meanwhile, the whole screen synchronous display will consume wireless network mobile data. This network learning platform can combine the grid with the network synchronization technology to synchronize the information displayed on the multimedia equipment with the learners' computers. Besides, it can share the network instructional resources. A new teaching technology combining the course synchronous system with the network learning platform proposed in this article with the grid, the network teaching system and the synchronization technology of network learning platform as the theoretical basis is composed of 2 parts: the learning module (including the course learning function and the assignment uploading and correcting function) and the synchronous display module. We tested the practical effect of the new network learning platform and found that this platform could broaden the learning space of the architecture specialty, facilitate the sharing of learning resources, improve the learning quality effectively, and complement the implementation of traditional learning methods beneficially.
Multimedia Teaching Platform Construction Based on Flash Interaction Technology for Gymnastics
Authors: Xia Changhui
Published: April 2018

The rapid development of mobile multimedia technology provides broader space for improvement of distance teaching system. It is very difficult for the previous multimedia technology to meet people’s requirements for informatization and intelligentization of multimedia teaching. The appearance of Flash technology offers the new thought for multimedia teaching. Flash not just supports image, voice and video, but also owns thorough object-oriented program design and can achieve interaction among multimedia of different types. In this paper, based on functional framework and distance question answering sub-system, multimedia teaching platform for Gymnastics based on Flash was constructed. Besides, the course Gymnastics was taken for example to carry out effect test, in the hope of offering data support for improvement and promotion of multimedia teaching platform and exploiting future potential development direction of network teaching.
Thymic pathology and cardiac myxomas: Coincidence or a closer relationship?
Authors: Moraitis Sotirios D. , Agrafiotis Apostolos C. , Pappas Dimitrios , Pothitakis Chrysovalantis , Stergianni Maria , Koukis Ioannis
Published: April 2018

Myxomas are the most common benign cardiac tumors and are located more frequently in the left atrium. In the literature there are cases describing the coexistence of thymic tumors and cardiac myxomas. In the case reported herein, during the resection of a cardiac myxoma, an enlarged thymus gland was encountered and resected. The histological exam revealed a thymic hyperplasia. The aim of this case study is to assess the need of conducting further studies in order to identify a common histological pathway between thymic lesions and cardiac myxomas. The diagnosis of a cardiac myxoma could justify a further workup of the anterior mediastinum in order not to overlook a lesion of thymic origin.
Religion, politics and the dilemma of modernising Ethiopia
Authors: Girma Mohammed
Published: April 2018

Ethiopia is an old society often confronted with new ideas and foreign values. As a result, social changes and modernisation were important contentious points especially in the late 19th and early 20th centuries. Some wanted change and progress at the expense of indigenous values, specifically cultural and political independence, while others opted for a more cautious approach. Inasmuch as Ethiopia’s context was one in which the church and the state were accustomed to seeing themselves as two sides of the same coin, the discourse of modernisation had both a political and religious flavour to it. This article therefore aims to examine the volatile dynamics between religion (especially the Protestant churches of the ‘southern peripheries’) and the Marxist regime in modernising Ethiopia. Specifically, the article intends to explore how state-church relations transformed social thinking in Ethiopia. I begin by sketching the historical background and proceed to unravel the dilemma of modernisation. In the final part, I discuss how Protestantism contributed to modernising three aspects of social structure: the understanding of the human person, state-church relations and social organisation.
Triangulated surfaces in triangulated categories
Authors: Dyckerhoff Tobias , Kapranov Mikhail
Published: April 2018

For a triangulated category

\mathcal A

with a 2-periodic dg-enhancement and a triangulated oriented marked surface

S

, we introduce a dg-category

F(S,\mathcal A)

parametrizing systems of exact triangles in

\mathcal A

labelled by triangles of

S

. Our main result is that

\mathcal F(S,\mathcal A)

is independent of the choice of a triangulation of

S

up to essentially unique Morita equivalence. In particular, it admits a canonical action of the mapping class group. The proof is based on general properties of cyclic 2-Segal spaces.

In the simplest case, where

\mathcal A

is the category of 2-periodic complexes of vector spaces,

\mathcal F(S,\mathcal A)

turns out to be a purely topological model for the Fukaya category of the surface

S

. Therefore, our construction can be seen as implementing a 2-dimensional instance of Kontsevich's program on localizing the Fukaya category along a singular Lagrangian spine.
Relato de Experiência da Aproximação do CREPOP-RS ao Meio Acadêmico: Formação em Psicologia e Políticas Públicas
Authors: Torres Samantha , Ecker Daniel Dall'Igna
Published: April 2018

Este relato de experiência discute o desenvolvimento de um projeto-piloto de aproximação do Centro de Referência Técnica em Psicologia e Políticas Públicas (CREPOP), do Conselho Regional de Psicologia do Rio Grande do Sul (CRP/RS), ao meio acadêmico. A aproximação objetivou fomentar a discussão sobre a formação em psicologia e as políticas públicas junto a estudantes e professores de graduação de duas universidades do estado do Rio Grande do Sul. O projeto foi executado em duas etapas: encontro com os estudantes inseridos em estágios e discussão sobre a temática seguida da sistematização dos dados obtidos; debate dos dados sistematizados com os professores que compõem o corpo docente do curso de psicologia de cada instituição. A partir dos resultados foi possível organizar os relatos dos estudantes nas seguintes categorias: 1) Presença da temática na formação; 2) Espaços de prática profissional; 3) Formação crítica; 4) Interdisciplinaridade; 5) Qualificação do corpo docente; 6) Atuação política; 7) Protagonismo estudantil. Por fim, avaliamos o projeto-piloto como um espaço potente de reflexão sobre a interface entre a formação em psicologia e as políticas públicas.
Desdobramentos do Ensino Acadêmico da Psicanálise na Clínica Ofertada em Hospital Geral
Authors: Palma Claudia Maria De Sousa
Published: April 2018

O presente artigo se interessa pelas questões inerentes a oferta de formação psicanalítica acadêmica e seus desdobramentos numa clínica concomitantemente experimentada em instituição de saúde pública. Para tanto, dialoga com uma pesquisa realizada com pacientes atendidos por profissionais em especialização, e com um projeto de extensão a respeito das condições iniciais de encontro de discentes em graduação com os dispositivos da clínica psicanalítica. As modalidades de ensino respectivamente propostas se realizaram em articulação com uma clínica estabelecida em hospital geral. O trabalho destaca essas nuances da formação, atendo-se às consequências de que se a experiência com a clínica é uma das condições à formação de um analista, um analista é condição à instauração da situação analítica que ao tratamento interessa. Discute a implicação nos efeitos produzidos pela clínica ofertada em instituição, considerando o cenário institucional com sua variedade clínica e suas demandas curativas que se, por um lado, convidam a uma multiplicidade de encontros clínicos que somam à formação, por outro solicitam uma condição formativa se o horizonte é um tratamento analítico na sua distinção às abordagens terapêuticas e assistenciais. Sobre esse ponto, o artigo resgata os indicadores freudianos quanto aos limites de apreensão à vertente clínica da psicanálise, na universidade, alinhando-se à análise pessoal do profissional como dispositivo fundamental. Considerando a especificidade da proposta acadêmica na graduação, propõe um dispositivo de ensino ao manejo com o saber que à clínica psicanalítica interessa.
A Tragicidade do Sujeito do Discurso
Authors: Monte-Serrat Dionéia , Tfouni Leda Verdiani
Published: April 2018

Os conceitos de discurso e tragicidade na atualidade nos remetem aos conceitos de ideologia e de sujeito. Utilizamos a perspectiva teóricada Análise do Discurso de Michel Pêcheux (1988), para definir discurso como efeito de sentidos entre interlocutores determinados sócio-historicamente e interpelados pela ideologia. A tragicidade do sujeito do discurso, sob essa perspectiva, pode ser concebida no paradoxo do funcionamento do mecanismo de interpelação, que dá origem ao sujeito: este, ao mesmo tempo em que se acredita autônomo e livre, tem sua liberdade emaranhada em determinações econômicas ou sociais. A esse sujeito tomado como “evidência descritiva” da ideologia contrapomos o sujeito que se constitui no discurso. Este último oferece resistência ao destino trágico do idealismo cuja função é de tentar apagar outros sentidos possíveis. Embora a interpelação pela ideologia mascare o caráter material do sentido - impondo a transparência de sentido, o sentido único -, Pêcheux (1988) traz um alerta sobre a possibilidade de resistência e revolta dentro do processo de assujeitamento, pois, para ele, a ideologia existe sob o modo da divisão, se realiza na contradição. O deslocamento ideológico, o imprevisível, interrompe a perpetuação das repetições do ritual ideológico. Esse acontecimento, sob a perspectiva da psicanálise - que concebe o sujeito como dividido e não centrado -, permite compreender o sujeito do discurso sob a dimensão de “efeito do significante” e nos leva a concluir que a subjetividade é um lugar que cumpre dupla função: a de evidenciar o assujeitamento e a de evidenciar a subversão deste, rompendo o círculo vicioso do idealismo, fazendo interromper o destino trágico do sujeito capturado pela interpelação ideológica.
Guerra, Tempo e Memória: Duas Notas sobre a Mortalidade Juvenil Brasileira
Authors: Guerra Andréa Máris Campos , Aranha Mariana Da Costa
Published: April 2018

O artigo propõe duas notas para analisar a guerra entre os jovens no microtráfico ilícito de drogas numa interface entre psicanálise e antropologia, a partir da noção entre tempo e memória. Na primeira nota, trabalhamos a hipótese de que a guerra teria a função de conectar passado e futuro, pois através da vingança haveria uma inscrição no tempo e uma marca cunhada na história, que se perpetua através da memória. A segunda nota trabalha o circuito das mortes no microtráfico incluindo o saber que o jovem lança mão para lidar com o mecanismo de exclusão a que estão submetidos. Neste sentido, trabalhamos a hipótese de que a morte desempenha uma função estrutural no sistema de vida destes jovens e comporta uma positividade, na medida em que escreve a presença destes sujeitos na cidade, ainda que pelas avessas. Ao serem nomeados pelos registros oficiais dos dispositivos de poder, os jovens ganham inscrição, ao mesmo tempo em que se apagam na escrita de um nome na história dos homens. Assim, correndo risco de vida na guerra do tráfico, os jovens parecem almejar não a morte, mas a inscrição de uma escrita marginal, que não ganha registro na língua do Outro social.
Jovens “Infratores”, o RAP e o Poetar: Deslizamentos da “Vida Nua” à “Vida Loka”
Authors: Gurski Rose
Published: April 2018

Este artigo apresenta o início de uma interlocução entre a Psicanálise e a socioeducação através da construção de uma Oficina de rap (Ritmos, Adolescência e Poesia) como dispositivo de pesquisaintervenção com adolescentes em conflito com a lei que se encontram em uma instituição de execução de medidas socioeducativas de privação de liberdade. Através do rap, buscamos extrair um pouco de “poesia” do cotidiano árido que compõe as vidas desses meninos. Ao escutar a dimensão do traumático da exclusão em suas narrativas, e contando com a potência da palavra e da música, buscamos um modo de evocar deslocamentos em algumas significações cristalizadas. O trabalho teve como sustentação teórico-metodológica a conjugação da psicanálise de Freud e Lacan articulada ao tema da experiência em Walter Benjamin. A partir da experiência nas Oficinas construímos algumas reflexões que ensejam o que temos proposto como diálogo da Psicanálise com a socioeducação. Nesse sentido, também ensaiamos uma reflexão acerca da posição desses sujeitos com o que Agamben conceitua sobre o “homo sacer” e a “vida nua”. As letras de rap enunciam o sofrimento que esses jovens sentem pela dimensão de suas vidas como “mera vida”. Como efeito do trabalho, entendemos o rap como um modo de poetar, que faz circular os significantes das vidas “ressacadas”, com o que relativiza o peso do lugar da exclusão. Deste modo, o artigo mostra a potência de se considerar o rap como um dispositivo passível de oferecer a esses meninos condições para que possam deslizar da “vida nua”, que lhes colocou na via do conflito com a lei, para tantas outras significações quanto a aventura com a polissemia da palavra e da música tenha condição de lhes propiciar.
Escolha Profissional na Adolescência: Um Estudo Psicanalítico
Authors: Costa Juvaneide Régia , Medeiros Cynthia Pereira de , Ribeiro Cynara Teixeira
Published: April 2018

As profundas transformações de ordem política, econômica e social nas sociedades capitalistas e globalizadas, geradas pelos avanços da ciência, da indústria eletrônica, da informática e da robótica, refletem-se na coletividade e nos modos de organização do mundo do trabalho. Adolescentes e jovens são afetados por essas transformações, apresentando manifestações psíquicas diversas frente à escolha de suas profissões, que denunciam o mal-estar e o sofrimento vivenciado diante das vicissitudes desse processo e das expectativas por ele geradas. Trata-se de um artigo teórico no qual articulamos as dificuldades e os impasses que envolvem a escolha profissional na adolescência às determinações psíquicas inconscientes desse processo e aos lutos que o adolescente precisará fazer para poder optar por uma profissão. A partir do referencial freudiano e lacaniano, realizou-se um estudo do conceito de adolescência que, articulado ao processo de escolha profissional e a fragmentos de casos clínicos, evidenciou as seguintes conclusões: 1. Nas escolhas humanas estão implicados processos psíquicos diversos, que, iniciados na infância, são atualizados na adolescência, determinando as escolhas do adolescente, inclusive a profissional; 2. É necessária a elaboração simbólica da separação dos pais da infância, e dos lutos relativos às perdas e renúncias relacionadas às mudanças corporais e aos objetos infantis, para que o adolescente possa aceder ao seu desejo e sustentar suas possibilidades de escolha; 3. A escuta da dimensão inconsciente, presente nas escolhas do sujeito no campo profissional, é fundamental para uma análise das dificuldades aí surgidas, bem como para o encontro de saídas singulares para elas.