bluuebunny/crossref_metadata_2025_split huggingface dataset:
Humour and self-presentation on WhatsApp profile
status
Authors: Maíz-Arévalo Carmen 
Published: August 2020

Abstract
Self-presentation encompasses a set of strategies through which
individuals communicate an image of themselves to others. Self-presentation has been
widely studied both in face-to-face communication and online. Most online research,
however, has focused on social networking sites, blogs, chatrooms, etc. while less
attention has been paid to other online means of communication such as
WhatsApp. The aim of this chapter is to analyse self-presentation
on WhatsApp statuses. More specifically, I focus on the use of
humour as a self-presentation strategy in WhatsApp statuses and
ascertain whether or not there are common patterns with regard to gender or age. To
this purpose, a corpus of 206 WhatsApp statuses in Spanish was
analysed following both a quantitative and qualitative methodology. Results shows
the existence of recurrent patterns connected to these variables, which seem to play
a crucial role to determine the choice of humour as a self-presentation
strategy.
Candidates’ use of Twitter during the 2016 Austrian presidential
campaign
Authors: Gruber Helmut 
Published: August 2020

Abstract
This paper explores the Twitter use by the candidates of the
2016 Austrian presidential campaign which lasted for almost one year and required
three ballots in sequence. The data corpus consists of all Twitter messages the
candidates posted during the campaign. Drawing on theoretical considerations
regarding politicians’ and political parties’ use of internet communication
technologies (esp. the innovation vs. the normalization hypotheses), the paper
explores the content level, the use of rhetorical actions, and selected aspects of
the interpersonal level of the data. Results show that the candidates’ communication
strategies cannot fully be explained by either of the two hypotheses and hence that
none of them can predict electoral success in this specific political campaign. It
is concluded that the two proposed hypotheses concerning the use of internet
communication technologies in the field of politics are too broad and that they have
to be modified to account for contextual aspects of specific political communication
situations.
Migration through the English-Greek translated press
Authors: Sidiropoulou Maria 
Published: August 2020

Abstract
The chapter problematizes pragmatic shifts in 2015
web-retrieved English-Greek translated press news texts on the 2015 refugee crisis
in Europe. There seems to be a gate-keeping role of the traditional media to locally
reshape global dissemination of inference-making through verbal material, which
changes the realism of the news. The study analyses patterns of shifts in verbally
mediated instances of suffering and migration in the Greek translated press to show
the contribution of the receiving institutions’ and the translator’s critical view
in re-narrating news items in specific historical and political conditions. Managing
discoursal inferences may involve making intended inferences explicit in a target
version, reshaping world representations to affect inclusion/exclusion strategizing
in the reception environment, manipulating metaphors to avoid unintended
connotations which may be favoured on a global scale, etc. Local perceptions of
global conflicts may de/mobilize public sentiment and construct ethical intended
sensibilities and citizenship roles.
Pilot comparison CCQM-P177—monoterpenes in nitrogen at 2.5 nmol mol−1 final report
Authors: Liaskos Christina , Rhoderick George , Hodges Joseph , Possolo Antonio , Wilke Olaf 
Published: August 2020

Growing awareness of the impact of monoterpenes on climate, atmospheric chemistry, and indoor air quality has necessitated the development of measurement standards to globally monitor and control their emissions. For National Metrology Institutes to develop such standards, it is essential that they demonstrate measurement equivalence for assigned values at the highest levels of accuracy. This report describes the results of a pilot comparison for 4 key monoterpene species: α-pinene, 3-carene, R-limonene and 1,8-cineole, at a nominal amount-of-substance fraction of 2.5 nmol mol−1. The objective of this comparison is to evaluate participant capabilities to measure trace-level monoterpenes using their own calibration techniques.

Main text

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.
The final report has been peer-reviewed and approved for publication by the CCQM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
Lowest observed surface and weld losses in fused silica fibres for gravitational wave detectors
Authors: Cumming A V , Sorazu B , Daw E , Hammond G D , Hough J , Jones R , Martin I W , Rowan S , Strain K A , Williams D 
Published: August 2020

Abstract
High purity fused silica has become the cornerstone choice for use in the final monolithic stage of the mirror suspensions in the gravitational wave observatories Advanced LIGO (aLIGO) and Advanced Virgo (AdV). The ultra-low thermal noise contributed by these suspensions is one of the key improvements that permitted the Nobel prize winning first direct measurement of gravitational waves in 2015. This paper outlines the first in situ study undertaken to analyse the thermal noise of the final monolithic stage of the aLIGO Hanford detector mirror suspensions. We analysed short operational periods of this detector, when high excitation of the transverse ‘violin’ modes of the silica suspension fibres occurred. This allowed detailed measurements of the Q-factor of violin modes up to order 8 of individual fibres on separate masses. We demonstrate the highest silica fibre violin mode Q-factors yet measured of up to 2 × 109. From finite element modelling, the dominant surface and weld losses have been calculated to be a factor of 3 to 4 better than previously accepted, and as a result, we demonstrate that the level of noise in the aLIGO final stage silica suspensions is around 30%–40% better than previously estimated between frequencies of 10–500 Hz. This leads to an increase in the estimated event rate by a factor of 2 for aLIGO, if suspension thermal noise became the main limitation to the sensitivity of the detector.
Generalized uncertainty principle in resonant detectors of gravitational waves
Authors: Bhattacharyya Sukanta , Gangopadhyay Sunandan , Saha Anirban 
Published: August 2020

Abstract
With the direct detection of gravitational waves (GWs) by advanced LIGO detector, a new ‘window’ to quantum gravity phenomenology has been opened. At present, these detectors achieve the sensitivity to detect the length variation (δL),

O
≈
1

0

−
17

−
1

0

−
21

metre. Recently a more stringent upperbound on the dimensionless parameter β
0, bearing the effect of generalized uncertainty principle (GUP) has been given which corresponds to the intermediate length scale

l

i
m

=

β

0

l

p
l

∼
1

0

−
23

m

. Hence the flavour of the GUP can be realised by observing the response of the vibrations of phonon modes in such resonant detectors in the near future. In this paper, therefore, we calculate the resonant frequencies and transition rates induced by the incoming GWs on these detectors in the GUP framework. It is observed that the effects of the GUP bears its signature in both the time independent and dependent part of the gravitational wave-harmonic oscillator Hamiltonian. We also make an upper bound estimate of the GUP parameter.
Horseshoes and invariant tori in cosmological models with a coupled field and non-zero curvature
*
Authors: Butler Leo T 
Published: August 2020

Abstract
This paper studies the dynamics of a family of Hamiltonian systems that originate from Friedman–Lemaître–Robertson–Walker space-times with a coupled field and non-zero curvature. In four distinct cases, previously considered by Maciejewski, Przybylska, Stachowiak and Szydowski, it is shown that there are homoclinic connections to invariant submanifolds and the connections split. These results imply the non-existence of a real-analytic integral independent of the Hamiltonian.
An ultrathin acoustic carpet cloak based on resonators with extended necks
Authors: Guo Jingwen , Zhou Jie 
Published: August 2020

Abstract
By employing a set of resonators with extended necks, an ultrathin acoustic carpet cloak with a thickness of about 1/30th of the operation wavelength is proposed to achieve effective cloaking around a bump at 1000 Hz. The cloak is composed of a periodic array of supercells. The supercell is constructed by a solid unit and seven inhomogeneous resonators with different extended necks. The elements in the supercell are capable of achieving distinct phase shifts ranging from 0 to 2π in a phase increment of π/4. To demonstrate the effectiveness of the cloak, both normal incidence and oblique incidence (incident angle equals to 30°) plane waves impinging on a cloaked triangular bump are investigated numerically and validated experimentally. The results show that it is possible to conceal the bump by wrapping over the surface of the bump through using the proposed ultrathin carpet cloak. As a resonant-element based acoustic device, the cloak exhibits invisibility in the frequency range from 980 to 1070 Hz. The proposed acoustic metasurface offers a simple and compact solution for acoustic cloaking and may hold promise in realistic applications.
Assisted cold start method for GPS receiver with artificial neural network-based satellite orbit prediction
Authors: Yang Ruihong , Song Zhongguo , Chen Lingfeng , Gu Yue , Xi Xiaoli 
Published: August 2020

Abstract
Traditional GPS receivers usually take a long time to obtain their first position solution in the cold start mode. This paper presents a method for assisting the cold start of GPS receivers by autonomous satellite orbit prediction. In this method, the time-consuming broadcast ephemeris collection process in a traditional cold start is replaced by orbit prediction to obtain the satellite position information required for positioning. Thus, the time to first fix of the receiver can be reduced significantly. In addition, since the traditional orbit prediction algorithms based solely on physics-based models have limited accuracy, a hybrid model composed of dynamic models and artificial neural network models for orbit prediction is proposed to improve the accuracy of the orbit prediction. Taking GPS PRN1 as an example, the simulation results show that, in 75% of cases, the satellite position error after 7 days’ prediction with the dynamic models is less than 162.84 m, but this value can be reduced to 46.06 m with the proposed hybrid model; the improvement rate achieved is approximately 71.71%. Some positioning experiments with simulated satellite signals were conducted to assess the first-fix accuracy of a GPS receiver with the proposed satellite orbit prediction function. The results of this study offer insights for the design of advanced assisted GPS receivers.
Effect of surfactants on the lightning breakdown voltage of palm oil and coconut oil based Al2O3nanofluids
Authors: Mohamad Nur Aqilah , Azis Norhafiz , Jasni Jasronita , Ab. Kadir Mohd Zainal Abidin , Yunus Robiah , Yaakub Zaini 
Published: August 2020

AbstractIn this paper, the effect of different types of surfactants on the lightning breakdown voltages of palm oil (PO) and coconut oil (CO) based aluminium oxide (Al2O3) nanofluids is investigated. Three different types of surfactants were used in this study known as cationic (cetyl trimethyl ammonium bromide (CTAB)), anionic (sodium dodecyl sulfate (SDS)) and non-ionic (oleic acid (OA)). The volume percentage concentrations of Al2O3dispersed into PO and CO were varied from 0.001% to 0.05%. The ratio of surfactant to the nanoparticles was set to 50% from the volume concentration of nanoparticles which equivalent to 1:2. In total, two types of refined, bleached and deodorized palm oil (RBDPO) and one type of CO were examined for lightning breakdown voltage. The test was carried out based on needle-sphere electrodes configuration with 25 mm gap distance. The presence of Al2O3improves both positive and negative lightning breakdown voltages of RBDPO and CO. Under the positive and negative polarities, the CTAB does provide further improvements on the lightning breakdown voltages of RBDPOA (1st type of samples) and CO at most of the volume of concentration of Al2O3. SDS and OA could also further improve the lightning breakdown voltage of CO at certain volume concentration of Al2O3. On the other hand, the lightning breakdown voltage of RBDPOB based Al2O3nanofluid (2nd type of samples) does not further improve with the introduction of surfactants. At most of the volume concentration of Al2O3, the introduction of CTAB further increases the times to breakdown and decrease the average streamer velocities of RBDPOA under both polarities. The same finding is observed for CO under positive polarity with CTAB and SDS as well as under negative polarity in the presence of all surfactants. The streamer velocities and times to breakdown patterns of RBDPOB based Al2O3nanofluid are inconsistent in the presence of all surfactants. It is found that RBDPO and CO based Al2O3nanofluids have second mode of streamer whereby the streamer velocities are from 1 km s−1to 1.63 km s−1regardless with or without surfactants.
Recent progress of superconducting fault current limiter in China
Authors: Zhang GuoMin , Wang Haonan , Qiu Qinggquan , Zhang Zhifeng , Xiao Liye , Lin Liangzhen 
Published: August 2020

Abstract
With the increase of electricity demand and the rapid development of renewable energy generation, it is becoming more and more important to ensure the safety and stability of power grid, where a superconducting fault current limiter (SFCL) could play an important role. In recent years, a lot of research work has been done in China on the application of high temperature superconducting (HTS) power technology, especially in the aspects of superconducting fault current limiting technology, superconducting fault current limiting-breaking technology, superconducting fault current limiting- magnetic energy storage technology, and superconducting fault current limiting transformer technology. A number of demonstration projects on SFCL were also conducted. In this paper, the research progress of HTS fault current limiters (both AC and DC) in China in recent years is introduced, including the completed projects and the on-going work. The possible application direction of SFCL in the future is proposed.
Coulomb-corrected strong-field approximation based on a genetic algorithm
Authors: Yang Shidong , Song Xiaohong , Liu Xiwang , Zhang Hongdan , Shi Guangluo , Yu Xianhuan , Tang Yajuan , Chen Jing , Yang Weifeng 
Published: August 2020

Abstract
Coulomb-corrected strong-field approximation (CCSFA), which integrates Coulomb potential and the interference effects, is a semiclassical method successful in the study of atomic strong-field ionization. However, it is difficult to numerically solve the saddle-point equation describing tunnelling in the CCSFA, especially for complex laser fields such as elliptically or orthogonally polarized two-color laser fields. In this work, we propose an efficient method based on the genetic algorithm (CCSFA-GA) to overcome this difficulty. The accuracy of our method is verified by comparing our result with the calculation of the standard CCSFA on a hydrogen atom, subjected to an intense laser field. Moreover, we show that the result of the numerical solution of the time-dependent Schrödinger equation with an elliptically polarized laser field can be well reproduced by the CCSFA-GA.
Detection of Coffee Bean Damage in The Roasting Process Based on Shape Features Analysis
Authors: Gunadi I G A , Artha I P M K , Christyaditama I G P , Wicaksana G A S , Martina I M 
Published: August 2020

Abstract
Many studies raise the issue of analysis on the quality of coffee beans (green beans). Green beans are the term used to indicate coffee beans before roasting. The importance of analyzing the quality of coffee beans not only in coffee beans but also in rice seeds. Rice seeds are used as a mixture in the roasting process of coffee. Analysis of the quality of roasted coffee is very important. In roasted coffee beans can be damaged and changes to the coffee beans. Some types of damage to coffee beans include, blackened seeds, partially blackened seeds, browned seeds, broken seeds, perforated seeds, epidermis seeds, horned skin seeds, too young seeds, spotted seeds, and dirty seeds. This study focuses on one of the damage factors, namely broken coffee beans after broken beans. In this study, analysis of roasted coffee quality was determined by shape analysis. The shape analysis uses elongation values. there are two categories of classification, the first class of coffee is of good quality, and the second is coffee with poor grade. Classification is good if the elongation value is more than 0.85, for other conditions it is classified as bad. The results of this study have the following accuracy values, at coffee with a classification of good accuracy of 93.4%, while those at coffee with a bad classification of accuracy are 78.5%.
Parameters Estimation Of Rayleigh Distribution In Survival Analysis On Type Ii Censored Data Using The Bayesian Method
Authors: Elviana Erma , Purwadi Joko 
Published: August 2020

Abstract
This research aims to determine the estimation of Rayleigh’s distribution parameters on the data survival analysis of type II of tuberculosis patients. The method used in this research is the Bayesian method to perform estimate parameters. The process estimation parameter using the Bayesian method requires information from the likelihood function and the prior distribution. The prior distribution used was the prior distribution of Jeffreys. In this study, estimates of Rayleigh’s distribution parameters were applied in the survival analysis data of tuberculosis sufferers. And the value of estimated parameters in patients with tuberculosis acquired θ = 0.001097324 and the changes of the survival value decreased near to zero.
Modified Public Key Cryptosystem Based On Circulant Matrix
Authors: Maxrizal  , Gusti Nyoman Yudi Hartawan I , Jana Padrul , Desy Aniska Prayanti Baiq 
Published: August 2020

Abstract
Experts believe that public key cryptosystems on non-commutative algebraic structures are resistant to the attack of quantum algorithms. In recent years, public key cryptosystems based on Polynomial Symmetrical Decomposition (PSD) on the non-commutative group have been developed. However, they are vulnerable to direct attack, linearization equations attack, and overdefined systems of multivariate polynomial equations attack. This cryptosystem has also been improved by experts. However, the operation of the proposed PSD Improvement still uses complex computing and untested. Therefore in this paper, we replace PSD on a non-commutative group into a non-commutative matrix group. We chose the circulant matrix on the key agreement protocol and the key distribution. The results show that the cryptosystem proposed on the circulant matrix is resistant to direct attack, linearization equations attack, and overdefined systems of multivariate polynomial equations attack.
Development of Mathematics Learning Device Based on Cooperative Model Type of Think Talk Write that Supported by Edmodo for Developing the Mathematics Problem Solving Skills
Authors: Adikana Wiandari Yadnya Ni Wayan , Made Ardana I , Gusti Putu Suharta I 
Published: August 2020

Abstract
This research aims to gather the mathematics learning device based on cooperative model type of think talk write that supported by Edmodo that has a validity, practical, and effective as an effort to improve student problem solving skills on mathematics. This research classified as a type of design research by following the design research procedure by Plomp that includes preliminary phase, prototype phase, and assessment phase. The subject of this research are students of grade X of Senior High School Number 2 Negara, they are 20 students of grade X MIPA 4 for limited tests, 36 students of grade X MIPA 2 for field test I, and 36 students of grade X MIPA 1 for field test II. Learning device that developed are students’ books and teachers’ books that supported by Edmodo. Students book is a mathematics book that intended by the researcher is a mathematics book that discus the trigonometry for grade X. Results of the research shows that learning device that developed fulfilled the validity criteria, practically criteria, and effectivity criteria that expected. Characteristics on the students’ book and teacher’s book are interestingly designed and adapted to the syntax of cooperative model type of think talk write that supported by Edmodo.
The Effect Of Guided Discovery Learning Model Assisted By Open-Ended Student Worksheets Towards Mathematical Problem Solving Ability Reviewed Of Student’s Emotional Intelligence
Authors: Mira Pratiwi Kadek , Gusti Putu Sudiarta I , Suweken Gede 
Published: August 2020

Abstract
This study aimed to find out whether students’ mathematics problem-solving ability taught using guided discovery learning model assisted by open-ended student worksheets is better than those using conventional learning. This research used a sequential mixed method that combined quantitative and qualitative research. Posttest only control design used for the quantitative data, while descriptive analysis used for the qualitative data. The population of the research was 349 students from the whole tenth grade in state high school of SMAN 5 Denpasar-Bali. In addition, cluster random sampling had done after testing the sample’s equivalent. The data obtained were analyzed using the t-test. The results of quantitative data indicate that: (1) students’ mathematics problem-solving ability taught using guided discovery learning model assisted by open-ended student worksheets is better than those using conventional learning, (2) in the group of higher emotional intelligence level and the group of lower emotional intelligence level, students’ mathematics problem-solving ability taught using guided discovery learning model assisted by open-ended student worksheets is better than those using conventional learning. The results of qualitative data indicate that guided discovery learning model assisted by open-ended student worksheets is able to give a positive contribution towards students’ mathematics problem-solving ability.
The Effectiveness Of Problem-Based Interactive Physics E-Module On High School Students’ Critical Thinking
Authors: Sujanem Rai , Nyoman Putu Suwindra I , Suswandi Iwan 
Published: August 2020

Abstract
This study aimed at analyzing the effectiveness of an interactive physics e-module (IPEM) to improve students’ critical thinking skill (CTS). IPEM is a module that contains unstructured problems, physics phenomena in the form of animations, videos, examples, and CTS problems. This IPEM was presented in the blended problem-based learning (BPBL) model. The population consisted of all tenth grade students at SMAN 2 and SMAN 4 Singaraja and classes X1 and X4 in SMAN 2 Singaraja and SMAN 4 Singaraja were selected as the sample by using a random sampling technique. The study used a quasi-experiment one group pre-test and post-test design. Before the lesson was taught by using IPEM, the students were given a CTS pretest. At the end of the lesson, they were given the same test (post-test). The data were analyzed using a paired t-test. The results showed that the average students’ cts before using IPEM was 22.7 , falling into a poor category, and the results showed that the average students’ cts before using IPEM was 59.1, falling into a medium category. The using a paired t-test result shows that there is a significant difference in the students’ CTS before and after using the IPEM. The students’ CTS after using IPEM is better than before using IPEM in learning process. That is why the IPEM in the BPBL model is effective to improve the students’ CTS of high schools.