bluuebunny/crossref_metadata_2025 huggingface dataset:
Bachatskiy induced earthquake on June 18, 2013, ML=6.1, I0=7 (Kuzbass)
Authors: Emanov Aleksandr , Emanov Aleksey , Fateev Aleksandr
Published: April 2020

The Bachatsky earthquake of 18 June 2013 and a seismic activation of the same name coal strip mine, started several years before the earthquake and still persists today, have been studied using temporal local seismic arrays in the area. It was found experimentally that the seismic process area is closely connected to open workings, and the earthquakes are extend-ed from the working bed to a depth of 4-5 km. Adjacent to the mine depression sedimentary rocks were activated. The technogenic seismic regime is continuous and not stationary: intervals of background seismicity with relatively weak and seldom events are disturbed by bursts of activity with a rise in the magnitude of stronger earthquakes and frequency of occurrence of weak events. The seismic activation may last for 1–3 months. During the last five years, four seismic activations have been recorded, three of which were generated by large earthquakes of 09.02.2012, ML4.3; 04.03.2013, ML3.9; 18.06.2013, ML6.1. The last one was completed by a series of perceptible earthquakes with local magnitude of 3.0–3.5. The focal mechanism of the Bachatsky earthquake is a thrust fault with one of the motion planes corresponding to the anthropogenic impact. The earthquake flow forms a single process in the space with the b-value of the Gutenberg-Richter relationship different from the natural seismicity. The studied induced seismicity does not correspond to the structural regularities of natural seismicity in the Altai-Sayan mountain area. The findings prove that the Bachatsky earthquake and associated activation can be considered as man-made events.
Determination of parameters of historical earthquakes based on macroseismic data
Authors: Cardanets Vladlen
Published: April 2020

The paper attempts to determine the main parameters of historical earthquakes of the Carpathian region based on macroseismic data, using the macroseismic field equation, indirect parameters, and complex comparison with modern earthquakes. So far, the main source of information about the parameters of historical earthquakes in the Carpathian region has been "New catalog of strong earthquakes ...". In this catalog, all parameters are defined very ap-proximately, with a wide range of values. In addition, over the forty-year period since the release of the catalog, the initial macroseismic data of Carpathian region earthquakes have been substantially replenished and re-evaluated using the MSK-64 macroseismic scale. The study determined such basic parameters of historical earthquakes as the macroseismic epicenter, the intensity at the epicenter, focal depth, and magnitude. As well as additional parameters: direction of the maximum macro-seismic effect, area of intensity zones, distance, and azimuth to the extreme point where the earthquake was felt. The earthquake parameters were calculated using the attenuation formula of the macroseismic field with coefficients obtained by the R.Z. Burtiev for intermediate earthquakes of the Vrancea zone of the Carpathian region, separately in four azimuthal ranges. For crustal earthquakes, the general Blake-Shebalin macroseismic field equation was used. Despite possible errors associated with a correct assessment of intensity at observation points, as well as the accuracy of the coefficients of the macro-seismic field equation used for specific seismic events, it was possible to determine the type of each historical earthquake and obtain more accurate values of their parameters. The re-fined parameters of historical earthquakes will allow making a more holistic picture of the seismic hazard in the Carpathian region.
Jogos Virtuais
Authors: Alves Tharini Rodrigues , Blascovi-Assis Silvana Maria , Lopes Paulo Batista , Romano Rosangela Guimarães , Prado Victor Auler de Almeida , Cymrot Raquel
Published: April 2020

O objetivo do estudo foi avaliar a aceleração do movimento e o desempenho de adolescentes com Síndrome de Down e de com desenvolvimento típico durante o arremesso no jogo de boliche do videogame Nintendo® Wii™. Os participantes foram 20 adolescentes, com idade entre 7 e 14 anos, divididos em dois grupos: GSD (Grupo Síndrome de Down) e GC (Grupo Controle).  Ambos os grupos fizeram os arremessos necessários para a finalização do jogo com a mão de preferência e um acelerômetro acoplado ao punho. Os dados foram analisados considerando-se apenas os 3 primeiros arremessos. Observou-se que a aceleração máxima média foi maior para o GC em todas as tentativas, porém com o número médio de tentativas equivalente para alcançar o objetivo do jogo. O boliche apresentou-se ao GSD como uma proposta de fácil compreensão, motivadora e com regras simples. Conclui-se que os jogos de arremesso no ambiente virtual podem favorecer o controle de aceleração do movimento.
Web service for data aggregation in eSports domain
Authors: Komarov Borys , Fiaidhi Jinan A. , Patel Jay
Published: April 2020

This paper describes our research work in regards building a data aggregation web service for eSports domain,
Image Captioning with Complementary Visual and Textual Cues
Authors: venkatesan Bharathwaaj , Sond Ravinder Kaur
Published: April 2020

Multi modality Image captioning
FOMO- social media engagement- smartphone addiction and distraction _IEEEPaper..pdf
Authors: Bandaru Akhil Kumar Reddy , Fiaidhi Jinan , Gannamani Vishnu Sudheer
Published: April 2020

Everything in this contemporary world can be
exploited including a smartphone. Smartphone has both pros and cons. So, our
research is focusing on the dark side of the smartphone and how it creates a
potential risk to our mental health, productivity, time and academic
performance. We are conducting a survey that examines the relationship
between social media use and academic performance. We want to show that heavy
social media usage is positively related to lower GPA i.e. Academic performance
has a negative correlation to social media addiction and suggesting to them the
best ways to get rid of smartphone addiction. Several mobile phone
applications are available to help smartphone users to self-monitor their
smartphone usage. These mobile applications may provide a means of delivering
behavioral interventions to protect smartphone users from their potential
problematic usage. At last, we want people to let them know the truth
of how heavy smartphone usage is affecting their mental health, productivity,
and safety in performing their daily tasks. 
Towards the Design and Evaluation of Interactive Technologies for Social Good
Authors: Mukherjee Souvik , Tsering Ngudup , Fiaidhi Jinan
Published: April 2020

Computer science
permeates our everyday lives in almost every space in the modern fast-paced
world. The potential of computer science to address the world’s most complex and
immediate problems is unbounded. Digital technologies have connected us to the
globe, and yet after coming this far, mere technical knowledge does not seem to
suffice a cause that is above the global technological requirement. Creative
and interdisciplinary solutions that encompass an understanding of technology
and people, along with a deep desire to improve the state of the world is the
need of the hour, that is, application of cross-discipline aspects from society
and technology towards development of social cause. This report gives a
qualitative case study of quantitative surveys that address two of the major
social challenges experienced by the society on a global scale, and explore
solutions and recommendations with interactive technologies to address them.
The report also discusses potential applications of mixed reality, and argues
that collaborative mixed reality can be deployed towards achieving the
interaction goal between different communication groups. It also suggests and
proposes the employment of collaborative mixed reality games as a probable
solution to minimize the social barriers encountered. The work draws upon
psychology, cultural anthropology, and art and urban studies along with
application areas from fields of human-computer interaction, computer supported
cooperative work, and ubiquitous computing.
Menjaga Nilai, Menyemai Kepariwisataan Global Yang Berkekuatan Lokal
Authors: Nurmansyah M. Andhy , Prawoto Sigit , Hapsari Dyah Eko , Rusmawati Roosi , Khasanah Ismatul
Published: April 2020

The development of Kampung Biru Arema (KBA) to become an educational tourist destination in urban areas is a necessity to support an increase in the community's economy. Development carried out independently has not shown optimal results so that it requires the intervention of various parties to support in realizing the aspirations of the community. The academic community of the Faculty of Cultural Sciences as part of its academic responsibilities takes part in developing the village in the form of community assistance. This community service program is intended to provide assistance to the KBA community to become an integrated educational tourist destination. After conducting a series of preliminary activities, an agreement was reached to develop five (5) tourist points to be further developed as the main sites for KBA tourism activities. The five points were named Tourism Areas: History, Dolanan, Disaster Mitigation, Arema, and Basa Walikan. The stakeholders involved in this program have shown seriousness in the effort to realize the ideal picture of the direction and form of the KBA and committed to carry out development as planned together in the next phase. For this reason, the community service team embodies the shared understanding in a tangible form in the form of visual designs, physical structure in the form of miniature areas developed in tourist areas. In addition, the team also constructed an area at the KBA tourist location as a model for the realization of the visual design.
Long Term Survival of a Patient with Brain Metastases from Lung Cancer: A Case Report
Authors: Tahseen Alrubai  , Arwa Mohsun Khalil  , Samaa AL Tabbah  , Rasha Zaki
Published: April 2020

Introduction: Brain metastasis (BM) commonly occurs in patients with advanced lung cancer and is associated with poor prognosis and short survival periods. In some cases, select patients survive several years which is rare.

Presentation of case: This case report highlights the long-term survival of a 55-year-old patient who was diagnosed with brain metastases from lung cancer three years ago and is currently alive following treatment with chemotherapy for the primary cancer and whole-brain radiation therapy and chemotherapy for the brain metastases. Since the diagnosis of brain metastases three years ago, the patient’s primary cancer has remained controlled and she is living a disease-free, functional life.

Discussion: Literature review identified female gender, performance status, number of metastatic sites, the presence of a solitary lesion or single lesion, brain metastases later in their illness, adenocarcinoma histology, younger age, and patients with EGFR and ALK alterations, to be all as favorable prognostic factors associated with long term survival in patients with brain metastasis secondary to lung cancer.

Conclusion: Further studies should be designed to investigate the factors that may relate to long term survival in patients with brain metastasis secondary to lung cancer. This should help further understand the treatment outcomes in these patients.

Keywords: Brain Metastasis; Chemotherapy; Carboplatin; Gemcitabine; Whole-brain radiation; Non-small-cell lung cancer
Os discursos sobre o desenvolvimento frente às políticas públicas de incentivo à implantação de cultivos de eucaliptos no Estado do Rio Grande do Sul
Authors: Binkowski Patrícia , Filippi Eduardo Ernesto
Published: April 2020

O presente artigo se propõe a identificar os atores e a apresentar os seus discursos em torno das políticas públicas de desenvolvimento voltadas ao incentivo dos cultivos de eucalipto na “Metade Sul” do Rio Grande do Sul. Para tanto, fazemos um breve histórico das políticas de incentivo à atividade florestal e a caracterização física, social e ambiental da região citada. A discussão procura mostrar que a construção do desenvolvimento não deve levar em consideração somente a dimensão econômica, mas também as dimensões ambiental, social, cultural e política, contrapondo-se ao discurso de alguns atores que vêem o desenvolvimento apenas como crescimento econômico.
From structure topology to chemical composition. XXVIII. Titanium silicates: Jinshajiangite from the Oktyabr'skii Massif, Donetsk Region, Ukraine, a new occurrence
Authors: Day Maxwell C. , Sokolova Elena , Hawthorne Frank C. , Downs Robert T.
Published: April 2020

Here we report electron-microprobe data and unit-cell parameters for jinshajiangite, ideally NaBaFe2+4Ti2(Si2O7)2O2(OH)2F, from a new locality: the Oktyabr'skii massif in the coastal area of the Azov Sea, Donetsk region, Ukraine. Chemical analysis by electron microprobe gave Nb2O5 1.59, ZrO2 0.61, TiO2 17.07, SiO2 27.60, Al2O3 0.08, Fe2O3 2.04, FeO 16.42, BaO 9.81, ZnO 0.76, MnO 12.97, CaO 1.82, MgO 0.07, K2O 2.05, Na2O 2.51, F 2.48, H2O 1.92, O = F –1.04, sum 98.76 wt.%; H2O was determined in accord with the required number of monovalent anions for the Ti-dominant perraultite-type minerals: OH + F = 3 pfu; the Fe3+/Fe2+ ratio was assigned in accord with Mössbauer-spectroscopy results for jinshajiangite from a different locality. The empirical formula calculated on the basis of 19 (O + F) is (Na0.71Ca0.28□0.01)Σ1(Ba0.56K0.38□0.06)Σ1(Fe2+1.99Mn1.59Fe3+0.22Zn0.08Mg0.02Al0.01□0.09)Σ4 (Ti1.86Nb0.10Zr0.04)Σ2(Si4.00O14)O2[(OH)1.86F0.14]Σ2F1.00, Z = 4. Unit-cell parameters from the single-crystal data were determined by least-squares refinement of 9807 reflections with I > 10σI and are as follows: a = 10.726(8), b = 13.834(10), c = 11.065(8) Å, α = 108.172(5), β = 99.251(7), γ = 90.00(1)°, V = 1537.5(3.4) Å3, space group C .
БАЖАНА КОНСТИТУЦІЯ КРОЛІВ ДЛЯ ВІДТВОРЕННЯ ТА ДЕЯКІ ТЕХНОЛОГІЧНІ ЕЛЕМЕНТИ СТИМУЛЯЦІЇ ОХОТИ КРОЛЕМАТОК
Authors: Гончаренко І.В. , Агій В.М.
Published: April 2020

В даній публікації наведено деякі дані з розведення кролів. Звернути увагу на домінуючі біологічні особливості кролематок (молочність, багатоплідність), які необхідно враховувати при відтворенні.

В статті наведено рід простих і доступних факторів стимуляції охоти кролематок, які позитивно впливають на репродуктивні функції маток.

При відтворенні кролів необхідно використовувати тварин міцної конституції і без вад екстер'єру. Встановлено, що кролі з міцною конституцією дають більшу кількість окролів протягом року та є більш стійкими до захворювань.

Глибокі та широкі груди є показником доброго здоров'я та міцної конституції. Спина і поперек повинні бути рівними, прямими та широкими, м'язи - тверді та щільні по всьому корпусу, особливо на боках та вздовж попереку.

Підгруддя у статево зрілих кролематок є ознакою спокійного темпераменту та хороших материнських якостей. Дуже великий підгруддя є ознакою ніжної конституції та є небажаним при відтворенні кролів.

До недоліків екстер'єру відносяться груба і перерозвинута голова, великі, товсті вуха, іноді обвислі, вузькі та не глибокі груди, вузька та довга спина, звислий або звужений крижово-поперековий відділ, тонкі та викривлені ноги, а також недостатньо виражені м'ясні форми і опушеність стоп.

Дослідженнями попередніх років встановлено, що 90 % порушень з відтворення тварин залежить від не збалансованої годівлі та від дефіциту есенційних біотичних мікроелементів (Mn, Zn, Se), деяких вітамінів і факторів зовнішнього середовища.

Доцільним є для нормування годівлі кролів використовувати БВМД, премікси, гранульовані повнокомпонентні комбікорми для кролів або курей, - цей метод стимуляції охоти кролематок є високоефективним перевіреним на практиці.

Отже, використання у фермерських та приватних господарствах племінних кролів міцної конституції, з хорошою молочністю і добре розвинутим материнським інстинктом, враховуючи фактори стимуляції охоти за умов повноцінної годівлі буде сприяти покращенню відтворення кролів та збільшенню виробництва кролятини.
Confirmation of Enhanced Long-wavelength Dust Emission in OMC 2/3
Authors: Mason Brian , Dicker Simon , Sadavoy Sarah , Stanchfield Sara , Mroczkowski Tony , Romero Charles , Friesen Rachel , Sarazin Craig , Sievers Jonathan , Stanke Thomas , Devlin Mark
Published: April 2020

Previous continuum observations from the MUSTANG camera on the Green Bank Telescope (GBT) of the nearby star-forming filament OMC 2/3 found elevated emission at 3.3 mm relative to shorter-wavelength data. As a consequence, the inferred dust emissivity index obtained from modified blackbody dust spectra was considerably lower than what is typically measured on ∼0.1 pc scales in nearby molecular clouds. Here we present new observations of OMC 2/3 collected with the MUSTANG-2 camera on the GBT that confirm this elevated emission. We also present for the first time sensitive 1 cm observations made with the Ka-band receiver on the GBT, which also show higher than expected emission. We use these observations—along with Herschel, JCMT, Mambo, and GISMO data—to assemble spectral energy distributions (SEDs) of a variety of structures in OMC 2/3 spanning the range 160 μm to 1 cm. The data at 2 mm and shorter are generally consistent with a modified blackbody spectrum and a single value of β ∼ 1.6. The 3 mm and 1 cm data, however, lie well above such an SED. The spectrum of the long-wavelength excess is inconsistent with both free–free emission and standard “Spinning Dust” models for Anomalous Microwave Emission (AME). The 3 mm and 1 cm data could be explained by a flatter dust emissivity at wavelengths shorter than 2 mm, potentially in concert with AME in some regions.
Deep Learning the Morphology of Dark Matter Substructure
Authors: Alexander Stephon , Gleyzer Sergei , McDonough Evan , Toomey Michael W. , Usai Emanuele
Published: April 2020

Strong gravitational lensing is a promising probe of the substructure of dark matter halos. Deep-learning methods have the potential to accurately identify images containing substructure, and differentiate weakly interacting massive particle dark matter from other well motivated models, including vortex substructure of dark matter condensates and superfluids. This is crucial in future efforts to identify the true nature of dark matter. We implement, for the first time, a classification approach to identifying dark matter based on simulated strong lensing images with different substructure. Utilizing convolutional neural networks trained on sets of simulated images, we demonstrate the feasibility of deep neural networks to reliably distinguish among different types of dark matter substructure. With thousands of strong lensing images anticipated with the coming launch of Vera C. Rubin Observatory, we expect that supervised and unsupervised deep-learning models will play a crucial role in determining the nature of dark matter.
Constraining the Mass of the Emerging Galaxy Cluster SpARCS1049+56 at z = 1.71 with Infrared Weak Lensing
Authors: Finner Kyle , James Jee M. , Webb Tracy , Wilson Gillian , Perlmutter Saul , Muzzin Adam , Hlavacek-Larrondo Julie
Published: April 2020

In the hierarchical structure formation model of the universe, galaxy clusters are assembled through a series of mergers. Accordingly, it is expected that galaxy clusters in the early universe are actively forming and dynamically young. Located at a high redshift of z = 1.71, SpARCS1049+56 offers a unique look into the galaxy cluster formation process. This cluster has been shown to be rich in cluster galaxies and to have intense star formation. Its high redshift pushes a weak-lensing analysis beyond the regime of the optical spectrum into that of the infrared. Equipped with deep Hubble Space Telescope Wide Field Camera 3 UVIS and IR observations, we present a weak-lensing characterization of SpARCS1049+56. As few IR weak-lensing studies have been performed, we discuss the details of point-spread function modeling and galaxy shape measurement for an IR weak-lensing procedure and the systematics that come with the territory. It will be critical to understand these systematics in future weak-lensing studies in the IR with the next-generation space telescopes such as the James Webb Space Telescope, Euclid, and WFIRST. Through a careful analysis, the mass distribution of this young galaxy cluster is mapped and the convergence peak is detected at a 3.3σ level. The weak-lensing mass of the cluster is estimated to be 3.5 ± 1.2 × 1014
M
⊙ and is consistent with the mass derived from a mass–richness scaling relation. This mass is extreme for a cluster at such a high redshift and suggests that SpARCS1049+56 is rare in the standard ΛCDM universe.
Kinetic Simulations of Nonrelativistic Perpendicular Shocks of Young Supernova Remnants. III. Magnetic Reconnection
Authors: Bohdan Artem , Pohl Martin , Niemiec Jacek , Vafin Sergei , Matsumoto Yosuke , Amano Takanobu , Hoshino Masahiro
Published: April 2020

Fully kinetic two-dimensional particle-in-cell simulations are used to study electron acceleration at high-Mach-number nonrelativistic perpendicular shocks. Supernova remnant shocks are mediated by the Weibel instability, which is excited because of an interaction between shock-reflected and upstream ions. Nonlinear evolution of the Weibel instability leads to the formation of current sheets. At the turbulent shock ramp the current sheets decay through magnetic reconnection. The number of reconnection sites strongly depends on the ion-to-electron mass ratio and the Alfvénic Mach number of the simulated shock. Electron acceleration is observed at locations where magnetic reconnection operates. For the highest mass ratios almost all electrons are involved in magnetic reconnection, which makes the magnetic reconnection the dominant acceleration process for electrons at these shocks. We discuss the relevance of our results for 3D systems with realistic ion-to-electron mass ratio.
Building the Largest Spectroscopic Sample of Ultracompact Massive Galaxies with the Kilo Degree Survey
Authors: Scognamiglio Diana , Tortora Crescenzo , Spavone Marilena , Spiniello Chiara , Napolitano Nicola R. , D’Ago Giuseppe , Barbera Francesco La , Getman Fedor , Roy Nivya , Raj Maria Angela , Radovich Mario , Brescia Massimo , Cavuoti Stefano , Koopmans Léon V. E. , Kuijken Konrad H. , Longo Giuseppe , Petrillo Carlo E.
Published: April 2020

Ultracompact massive galaxies (ucmgs), i.e., galaxies with stellar masses

and effective radii

, are very rare systems, in particular at low and intermediate redshifts. Their origin as well as their number density across cosmic time are still under scrutiny, especially because of the paucity of spectroscopically confirmed samples. We have started a systematic census of ucmg candidates within the ESO Kilo Degree Survey, together with a large spectroscopic follow-up campaign to build the largest possible sample of confirmed ucmgs. This is the third paper of the series and the second based on the spectroscopic follow-up program. Here, we present photometrical and structural parameters of 33 new candidates at redshifts

and confirm 19 of them as ucmgs, based on their nominal spectroscopically inferred

and

. This corresponds to a success rate of

, nicely consistent with our previous findings. The addition of these 19 newly confirmed objects allows us to fully assess the systematics on the system selection—and to finally reduce the number density uncertainties. Moreover, putting together the results from our current and past observational campaigns and some literature data, we build the largest sample of ucmgs ever collected, comprising 92 spectroscopically confirmed objects at

. This number raises to 116, allowing for a 3σ tolerance on the

and

thresholds for the ucmg definition. For all these galaxies, we have estimated the velocity dispersion values at the effective radii, which have been used to derive a preliminary mass–velocity dispersion correlation.
Repeatability of OCT Anterior Surface and Bowman's Layer Curvature and Aberrations in Normal and Keratoconic Eyes
Authors: Matalia Himanshu , Chinnappaiah Nandini , Chandapura Rachana , Galiyugavaradhan Sugaranjini , Shetty Rohit , Sinha Roy Abhijit
Published: April 2020

PURPOSE:

To study the repeatability of anterior surface and Bowman's layer curvature in normal and keratoconic eyes using optical coherence tomography (OCT).

METHODS:

In this study, 96 normal and 96 keratoconic eyes underwent corneal imaging using Pentacam (Oculus Optikgeräte, Wetzlar, Germany) and OCT (Triton, Topcon Corporation, Tokyo, Japan). The elevation data from segmented air–epithelium (A–E) and epithelium–Bowman's layer (E-B) interfaces in OCT scans were used to quantify curvature and aberrations. The wavefront aberrations were evaluated with the ray tracing method and 6th order Zernike polynomials. The intraclass correlation coefficient (ICC), within-subject standard deviation (Sw), and coefficient of variation (CoV) were used to assess repeatability.

RESULTS:

For curvatures, the Sw was less than 0.25 diopters (D) for the normal and keratoconic eyes. The Sw was highest for root mean square of lower order aberrations (0.14 µm) in keratoconic eyes. The CoV for curvatures was well below 0.5% for both groups. For some aberrations irrespective of groups, the CoV was greater because some individual aberrations (mean of three successive measurements) tended to be smaller in magnitude and even a small Sw resulted in a high CoV. For all variables, the ICC ranged between 0.80 and 0.99 for both the OCT and Pentacam measurements. Most variables were similar between the A–E and E-B interfaces (
P
> .05) for both groups. However, both differed significantly from all Pentacam variables (
P
< .05) in normal and keratoconic eyes.

CONCLUSIONS:

The repeatability of OCT curvatures and aberrations compared well with the Pentacam indices for normal and keratoconic eyes.

[
J Refract Surg
. 2020;36(4):247–252.]
The Development of Hypermedia Based E-Book for Integral Calculus Subject
Authors: Awaludin Awaludin , Wibawa Basuki , Winarsih Murni
Published: April 2020

This research focuses on the development and the validity of hypermedia based e-book for integral calculus subject. The research questions to be addressed are (1) how is the development of hypermedia based e-book for integral calculus? (2) how is the feasibility level of hypermedia based e-book for integral calculus subject? (3) is hypermedia based e-book effective in improving integral calculus learning achievement?. The objectives of the study are (1)to find out the process of developing hypermedia based e-book for integral calculus class, (2) to determine the level of feasibility of hypermedia based e-book for integral calculus class, (3) to find out the effectiveness of hypermedia based e-book used at integral calculus class. The research method employed was a research and development (R & D) based on Lee and Owens model. The subjects of this research included a design expert, a media expert, a mathematics expert and students at mathematics department at Halu Oleo University. The data collected through questionnaire, interview and a test. The data then were analyzed using both descriptive and inferential statistics. The findings revealed that (1) the development of hypermedia based e-book using Lee and Owen model consists of need assessment, front-end analysis, development, implementation and evaluation, (2) hypermedia based e-book was feasible to be used at integral calculus class after being tested formatively, (3) the use of hypermedia based e-book was effective to improve students’ integral calculus learning achievement.
On characteristic hydraulic times through hydrodynamic modelling: discussion and application in Patos Lagoon (RS)
Authors: Aguilera Laura , Santos Ana Lígia Favaro Dos , Rosman Paulo Cesar Colonna
Published: April 2020

Although the analyses of characteristic hydraulic times are important diagnostic tools for studying water mass exchanges and identifying areas prone to stagnation that are potentially subjected to eutrophication effects, their concepts and uses are often misinterpreted. This paper compares similarities and differences between widely used characteristic hydraulic times, CHT, known as Residence Time, Times of Water Renewal Rates and Water Age. A proper definition for each of these characteristic hydraulic times is stated to avoid the existing confusion with multiple concepts in the literature. Methodologies to compute these CHT through hydrodynamic modelling systems are presented and, in order to enhance understanding, applied to three idealized cases in steady flow channels: (1) Channel with uniform flow; (2) Channel with a lateral inflow; and (3) Channel with a lateral embayment. Finally, a practical example is discussed by applying the methodologies to the Patos Lagoon (RS). The results for the idealized channel cases are non-intuitive and this theoretical discussion clarifies the interpretation and uses of different timescales and outlines the Water Age as the more versatile and multifunctional timescale if compared to the others addressed here. The results for the Patos Lagoon exemplify the valuable information that CHT can offer for environmental management in natural water bodies.
Five new species of Meta Koch, 1836 (Araneae: Tetragnathidae) from Gaoligong Mountains, China
Authors: Wang Luyu , Zhou Guchun , Irfan Muhammad , Yang Sufang , Peng Xianjin
Published: April 2020

Five new species of the genus Meta C.L. Koch, 1836 from the Gongligong Mountains, Yunnan are described: Meta hamata sp. nov. (♂♀), M. longlingensis sp. nov. (♂), M. tangi sp. nov. (♂♀), M. yani sp. nov. (♂♀) and M. yinae sp. nov. (♂♀). Detailed descriptions of somatic features and genitalic characters, photos of the body and genital organs, line drawings of the copulatory organs and distribution maps are provided.
Effect of Stepwise Communication Education Program using SBAR among Nursing Students: Focusing on Scenarios and Nursing Case-based Role Playing
Authors: Noh Yoon Goo , Lee Insook
Published: April 2020

Purpose: This study intends to examine the effects of a stepwise communication education program among nursing college students, focusing on scenarios and nursing case-based role playing. Methods: The study design was a one-group repeated measure ANOVA. Participants were 27 nursing students in practice. Students participated in 5-week stepwise communication education program using SBAR; including 1 week of lecture education, 4 weeks of scenarios and nursing case-based role playing. The data were collected at each level of the education process: pre-education, after 1 week of lectures, and after completion of scenarios and nursing case-based role playing. Repeated measures ANOVA was used to determine changes in SBAR technique knowledge and communication self-efficacy. Results: The stepwise communication education program using SBAR was effective in increasing SBAR technique knowledge, and communication self-efficacy. The lecture-based education was effective only in the area of SBAR technique knowledge and its subscale, attitudes towards SBAR. However, scenarios and nursing case-based role playing was broadly effective across communication self-efficacy, SBAR technique knowledge, and its subscale, knowledge of the SBAR. Conclusion: Based on this study, we propose that it is necessary to confirm the effect of long-term SBAR communication education using scenarios and nursing case-based role playing in nursing students' practice.
On the Approximability of the Minimum Weight $t$-partite Clique Problem
Authors: Solano Geoffrey , Blin Guillaume , Raffinot Mathieu , Clemente Jhoirene , Caro Jaime
Published: April 2020

The ${\rm M{\small INIMUM}~W\small{EIGHT}}$ $t$-${\rm {\small PARTITE}~C{\small LIQUE}~P{\small ROBLEM}~MW} t {\rm CP}$ is the problem of finding a $t$-clique with minimum weight in a complete edge-weighted $t$-partite graph. The motivation for studying this problem is its potential in modelling the problem of identifying sets of commonly existing putative co-regulated, co-expressed genes, called gene clusters. In this paper, we show that ${\rm MW} t {\rm CP}$ is NP-hard, APX-hard in the general case. We also present a 2-approximation algorithm that runs in $O(n^2)$ for the metric case and has 1+$
\frac{1}{t}$-approximation performance guarantee for the ultrametric subclass of instances. We further show how relaxing or tightening the application of the metricity property affects the approximation ratio. Finally insights on the application ${\rm MW} t {\rm CP}$ to gene cluster discovery are presented.
Physico-chemical Characteristics of Ground Water Quality in District Satna (M.P.)
Authors: Kumar Asheesh , Bhatt Sachin
Published: April 2020

The problem of ground water pollution in several parts of the country has become so acute that unless urgent steps for detailed identification and abatement are taken, extensive ground water resources may be damaged. The quality of ground water depends on a large number of individual hydrological, physical, chemical and biological factors. Generally higher proportions of dissolved constituents are found in ground water than in surface water because of greater interaction of ground water with various materials in geologic strata. The work done on ground water of Satna District covering various inorganic non metallic constituents covered are pH, TS, TDS, TSS, TH, DO, BOD, COD, Alkinity, Conductivity.
Employees Work Stress in Saudi Telecom Sector: Examining the Role of Long Working Hours, Empowerment, Work Life Balance and Work Environment
Authors: Doghan Mohammed A. Al
Published: April 2020

Employee management in the telecom sector has emerged as one of the most important human resource functional areas in contemporary global environment. This management of employees in telecom sector is essentially directed toward the realisation of a superior work performance and productivity for efficient customer service and overall sustainability of an organisation in a competitive market. In this context, a background research suggest that work place stress has a derogatory impact on the overall performance through four identified variables such as work hours, work environment, empowerment and the work life balance practices at such organisations. Review of literature suggested an inherent link between less practices in these areas of people management leading to reduced performance and intention to leave. This research therefore undertakes the task to identify the impact of these four variable on the work place related stress and how it impacts the performance of the employees in Saudi Arabia telecom sector. A sample of 150 employees of the telecom sector was selected using a simple random sampling design and a quantitative approach to collect data through close ended questionnaire based survey. The collected data was analysed using the statistical program for social science software for deducing findings and testing hypotheses. The findings of the study indicated a direct link between reduced performance and stress related to the four identified variables of the study.
TomoMQA: Automated analysis program for MVCT quality assurance of helical tomotherapy
Authors: Han Min Cheol , Hong Chae‐Seon , Chang Kyung Hwan , Kim Jihun , Han Su Chul , Kim Dong Wook , Park Kwangwoo , Kim Min‐Joo , Shin Han Back , Lee Se Hyung , Kim Jin Sung
Published: April 2020

Purpose

In this study, we developed a simple but useful computer program, called TomoMQA, to offer an automated quality assurance for mega‐voltage computed tomography (MVCT) images generated via helical tomotherapy.

Methods

TomoMQA is written in MATLAB and contains three steps for analysis: (a) open the DICOM dataset folder generated via helical tomotherapy (i.e., TomoTherapy® and Radixact™), (b) call the baseline data for the consistency test and click the “Analysis” button (or click the “Analysis” button without the baseline data and export the results as the baseline data), and (c) print an analyzed report. The overall procedure for the QA analysis included in TomoMQA is referred from the TG‐148 recommendation. Here, the tolerances for MVCT QA were implemented from TG‐148 recommended values as default; however, it can be modified by a user manually.

Results

To test the performance of the TomoMQA program, 15 MVCTs were prepared from five helical tomotherapy machines (1 of TomoTherapy® HD, 2 of TomoTherapy® HDA, and 2 of Radixact™) in 3 months and the QA procedures were performed using TomoMQA. From our results, the evaluation revealed that the developed program can successfully perform the MVCT QA analysis irrespective of the type of helical tomotherapy equipment.

Conclusion

We successfully developed a new automated analysis program for MVCT QA of a helical tomotherapy platform, called TomoMQA. The developed program will be made freely downloadable from the TomoMQA‐dedicated website.
Comparative Risk of Diabetes Mellitus in Patients With Rheumatoid Arthritis Treated With Biologic or Targeted Synthetic Disease‐Modifying Drugs: A Cohort Study
Authors: Desai Rishi J. , Dejene Sara , Jin Yinzhu , Liu Jun , Kim Seoyoung C.
Published: April 2020

Objective

The objective of this study is to compare the risk of incident diabetes mellitus (DM) in patients with rheumatoid arthritis (RA) treated with biologic or targeted synthetic disease‐modifying antirheumatic drugs.

Methods

A new‐user observational cohort study was conducted using data from a US commercial (Truven MarketScan, 2005‐2016) claims database and a public insurance (Medicare, 2010‐2014) claims database. Patients with RA who did not have DM were selected into one of eight exposure groups (abatacept, infliximab, adalimumab, golimumab, certolizumab, etanercept, tocilizumab, or tofacitinib) and observed for the outcome of incident DM, defined as a combination of a diagnosis code and initiation of a hypoglycemic treatment. A stabilized inverse probability–weighted Cox proportional hazards model was used to account for 56 confounding variables and estimate hazard ratios (HRs) and 95% confidence intervals (CIs). All analyses were conducted separately in two databases, and estimates were combined using inverse variance meta‐analysis.

Results

Among a total of 50 505 patients with RA from Truven and 17 251 patients with RA from Medicare, incidence rates (95% CI) for DM were 6.8 (6.1‐7.6) and 6.6 (5.4‐7.9) per 1000 person‐years, respectively. After confounding adjustment, the pooled HRs (95% CI) indicated a significantly higher risk of DM among adalimumab (2.00 [1.11‐3.03]) and infliximab initiators (2.34 [1.38‐3.98]) compared with abatacept initiators. The pooled HR (95% CI) for the etanercept versus abatacept comparison was elevated but not statistically significant (1.65 [0.91‐2.98]). The effect estimates for certolizumab, golimumab, tocilizumab, and tofacitinib, compared with abatacept, were highly imprecise because of a limited sample size.

Conclusion

Initiation of abatacept was associated with a lower risk of incident DM in patients with RA compared with infliximab or adalimumab.
A Novel Multinary Intermetallic as an Active Electrocatalyst for Hydrogen Evolution
Authors: Jia Zhe , Yang Tao , Sun Ligang , Zhao Yilu , Li Wanpeng , Luan Junhua , Lyu Fucong , Zhang Lai‐Chang , Kruzic Jamie J. , Kai Ji‐Jung , Huang Jacob C. , Lu Jian , Liu Chain Tsuan
Published: April 2020

Electrochemical water splitting offers an attractive approach for hydrogen production. However, the lack of high‐performance cost‐effective electrocatalyst severely hinders its applications. Here, a multinary high‐entropy intermetallic (HEI) that possesses an unusual periodically ordered structure containing multiple non‐noble elements is reported, which can serve as a highly efficient electrocatalyst for hydrogen evolution. This HEI exhibits excellent activities in alkalinity with an overpotential of 88.2 mV at a current density of 10 mA cm−2 and a Tafel slope of 40.1 mV dec−1, which are comparable to those of noble catalysts. Theoretical calculations reveal that the chemical complexity and surprising atomic configurations provide a strong synergistic function to alter the electronic structure. Furthermore, the unique L12‐type ordered structure enables a specific site‐isolation effect to further stabilize the H2O/H* adsorption/desorption, which dramatically optimizes the energy barrier of hydrogen evolution. Such an HEI strategy uncovers a new paradigm to develop novel electrocatalyst with superior reaction activities.
Lithium Bonds in Lithium Batteries
Authors: Chen Xiang , Bai Yun‐Ke , Zhao Chen‐Zi , Shen Xin , Zhang Qiang
Published: April 2020

Lithium bonds are analogous to hydrogen bonds and are therefore expected to exhibit similar characteristics and functions. Additionally, the metallic nature and large atomic radius of Li bestow the Li bond with special features. As one of the most important applications of the element, Li batteries afford emerging opportunities for the exploration of Li bond chemistry. Herein, the historical development and concept of the Li bond are reviewed, in addition to the application of Li bonds in Li batteries. In this way, a comprehensive understanding of the Li bond in Li batteries and an outlook on its future developments is presented.
Synthesis of High χ–Low N Diblock Copolymers by Polymerization‐Induced Self‐Assembly
Authors: Jennings James , Cornel Erik J. , Derry Matthew J. , Beattie Deborah L. , Rymaruk Matthew J. , Deane Oliver J. , Ryan Anthony J. , Armes Steven P.
Published: April 2020

Polymerization‐induced self‐assembly (PISA) enables the scalable synthesis of functional block copolymer nanoparticles with various morphologies. Herein we exploit this versatile technique to produce so‐called “high χ–low N” diblock copolymers that undergo nanoscale phase separation in the solid state to produce sub‐10 nm surface features. By varying the degree of polymerization of the stabilizer and core‐forming blocks, PISA provides rapid access to a wide range of diblock copolymers, and enables fundamental thermodynamic parameters to be determined. In addition, the pre‐organization of copolymer chains within sterically‐stabilized nanoparticles that occurs during PISA leads to enhanced phase separation relative to that achieved using solution‐cast molecularly‐dissolved copolymer chains.
Construction of Helically Stacked π‐Electron Systems in Poly(quinolylene‐2,3‐methylene) Stabilized by Intramolecular Hydrogen Bonds
Authors: Kataoka Yuki , Kanbayashi Naoya , Fujii Naoka , Okamura Taka‐aki , Haino Takeharu , Onitsuka Kiyotaka
Published: April 2020

π‐Stacked polymers, which consist of layered π‐electron systems in a polymer, can be expected to be used in molecular electronic devices. However, the construction of a stable π‐stacked structure in a polymer is considerably challenging because it requires sophisticated designs and precise synthetic methods. Herein, we present a novel π‐stacked architecture based on poly(quinolylene‐2,3‐methylene) bearing alanine derivatives as the side chain, obtained through the living cyclo‐copolymerization of an o‐allenylaryl isocyanide. In the resulting polymer, the neighboring quinoline rings of the main chain form a layered structure with π–π interactions, which is stabilized by intramolecular hydrogen bonds. The vicinal quinoline units form two independent helices and the whole molecule is a twisted‐tape structure. This structure is established on the basis of UV/CD spectra, theoretical calculations, and atomic‐force microscopy.
Quantification of Bacterial Metabolic Activities in the Gut by d‐Amino Acid‐Based In Vivo Labeling
Authors: Lin Liyuan , Song Jia , Du Yahui , Wu Qiuyue , Gao Juan , Song Yanling , Yang Chaoyong , Wang Wei
Published: April 2020

Herein, we propose a metabolic d‐amino acid‐based labeling and in situ hybridization‐facilitated (MeDabLISH) strategy for the quantitative analysis of the indigenous metabolic status of gut bacteria. The fluorescent d‐amino acid (FDAA)‐based labeling intensities of bacteria were found to highly correlate with their temporal and steady‐state metabolic status. Then, after taxonomic identification of bacterial genera in the in vivo FDAA‐labeled mouse gut microbiota, by corresponding fluorescence in situ hybridization (FISH) probes, the metabolic activities of different gut bacterial genera are quantified by flow cytometry, using FISH signals to differentiate genera and FDAA signals to indicate their basal metabolic levels. It was found that Gram‐negative genera in the mouse microbiota have stronger metabolic activities during the daytime, and Gram‐positive genera have higher activities at the night. Our strategy will be instrumental in deepening our understanding of the highly complex microbiota.
DNA Nanoribbon‐Templated Self‐Assembly of Ultrasmall Fluorescent Copper Nanoclusters with Enhanced Luminescence
Authors: Ouyang Xiangyuan , Wang Meifang , Guo Linjie , Cui Chengjun , Liu Ting , Ren Yongan , Zhao Yan , Ge Zhilei , Guo Xiniu , Xie Gang , Li Jiang , Fan Chunhai , Wang Lihua
Published: April 2020

Fluorescent copper nanoclusters (CuNCs) have been widely used in chemical sensors, biological imaging, and light‐emitting devices. However, individual fluorescent CuNCs have limitations in their capabilities arising from poor photostability and weak emission intensities. As one kind of aggregation‐induced emission luminogen (AIEgen), the formation of aggregates with high compactness and good order can efficiently improve the emission intensity, stability, and tunability of CuNCs. Here, DNA nanoribbons, containing multiple specific binding sites, serve as a template for in situ synthesis and assembly of ultrasmall CuNCs (0.6 nm). These CuNC self‐assemblies exhibit enhanced luminescence and excellent fluorescence stability because of tight and ordered arrangement through DNA nanoribbons templating. Furthermore, the stable and bright CuNC assemblies are demonstrated in the high‐sensitivity detection and intracellular fluorescence imaging of biothiols.
Sterically Controlled C−H Olefination of Heteroarenes
Authors: Chen Hao , Farizyan Mirxan , Ghiringhelli Francesca , van Gemmeren Manuel
Published: April 2020

The regioselective functionalization of heteroarenes is a highly attractive synthetic target due to the prevalence of multiply substituted heteroarenes in nature and bioactive compounds. Some substitution patterns remain challenging: While highly efficient methods for the C2‐selective olefination of 3‐substituted five‐membered heteroarenes have been reported, analogous methods to access the 5‐olefinated products have remained limited by poor regioselectivities and/or the requirement to use an excess of the valuable heteroarene starting material. Herein we report a sterically controlled C−H olefination using heteroarenes as the limiting reagent. The method enables the highly C5‐selective olefination of a wide range of heteroarenes and is shown to be useful in the context of late‐stage functionalization.
Stability of the Gossypol‐Amine Adducts Used for Chromatographic Measurement of Total and Isomeric Gossypol
Authors: Dowd Michael K.
Published: April 2020

The stability of the gossypol amine adducts used for chromatographic determination of gossypol was studied. After extraction and complexation with R‐(−)‐2‐amino‐1‐propanol, the samples were diluted into an acetonitrile/phosphate buffer solution as described in AOCS Recommended Practice Ba 8a‐99. The solutions were then stored under different conditions before being analyzed by reverse‐phase chromatography. Samples stored in the dark at −80 °C or at −20 °C showed little change in peak size over 30 days. Samples stored in the dark at −4 °C or at room temperature showed a measurable reduction in gossypol peak size over the study period. Samples stored in the light at room temperature showed the greatest reduction with only 25% of the initial gossypol detectable after 30 days. The rate of degradation followed first‐order kinetics. The rate of decrease in gossypol peak size did not differ for the different gossypol matrices studied, i.e., cottonseed kernels, cottonseed meal, or pure gossypol‐acetic acid; nor did it differ for the individual gossypol enantiomers. The results indicate that these gossypol Schiff's base adducts can be transported on dry ice before chromatography with minimal concern for their stability.