bluuebunny/crossref_metadata_2025 huggingface dataset:
A Comparison of Imputation Methods for Item nonresponses with Unfolding Bracket Questions
Authors:   The Korean Data Analysis Society, Lee Da Hee , An Hyonggin
Published: February 2023

In social surveys, unfolding bracket questions are used as a technique to reduce the loss of information due to nonresponse when item nonresponses occur. Item nonresponse, including unfolding bracket questions, has a similar structure to interval censored survival data. However, imputation methods to handle item nonresponses including unfolding bracket questions are limited. In this study, we examine performance of imputation with and without unfolding bracket questions. Also we compare three imputation methods to handle unfolding bracket questions. The First method is a linear regression-based nearest neighbor hotdeck imputation. Secondly, it is possible to consider a uniform distribution that selects a value with the same probability within the section for each individual. The third is an imputation method using the survival function estimated by the nonparametric maximum likelihood estimation method. Hotdeck imputation was considered as an imputation for not using unfolding bracket questions. The performance of these imputation methods was evaluated through simulation and the KLoSA study is used to provide examples of the application of these methods to real data. Imputation methods using unfolding bracket questions showed better performance than the method without unfolding bracket questions. The performance of the imputation method using the survival function estimated by the nonparametric maximum likelihood estimation method was better when the nonresponse rate was low and when the nonresponse rate is large in terms of root mean square error. When the non-response rate is large, the linear regression-based nearest neighbor hotdeck imputation method showed better results in terms of mean bias.
A Simulation Study on Robustness of Classification Model with Mislabeled Data
Authors:   The Korean Data Analysis Society, Lee Seong Keon
Published: February 2023

In order to increase the accuracy and performance of classification models, the quality of data must be guaranteed. There are various factors that affect the quality of these data, such as measurement accuracy, missing value, and sampling biases. This study focuses on the robustness of the classification model for mislabeled data. The reason we are interested in mislabeled data is that it significantly degrades the performance of the model more than other common measurement errors. In this study, the efficiency of various classification methods for data with mislabels is reviewed. Fisher's linear discriminant analysis model (LDA), quadratic discriminant analysis model (QDA), and logistic regression model were considered in the statistical model-based method, and SVM (support vector machine) and boosting are compared in the algorithm-based method. As a result of simulation study, it is found that the statistical model based approaches show better results in terms of robustness in the data assuming various situations of mislabels.
Sensitivity Analysis for Correspondence Analysis Using Doubling Technique
Authors:   The Korean Data Analysis Society, Han Sang-Tae
Published: February 2023

Correspondence analysis is generally a data analysis technique that expresses a two-dimensional or higher contingency table in a low-dimensional space to see the combination of rows and columns. In general, a statistical analysis method applied to contingency table analysis uses a chi-square test, but the chi-square test has a limitation in that it cannot show the coupling pattern for rows and columns. As an alternative, correspondence analysis is used. In general, the row profiles of correspondence analysis sum to 1. For data evaluated on the Likert scale for various attributes of each entity, the sum of rows is different for each row, so general correspondence analysis cannot be performed. Correspondence analysis can be applied to such data by doubling the number of column categories by adding the positive and negative values of each attribute so that the sum is equal. This is called the doubling technique. As a result of exploratory multivariate data analysis that does not rely on normal distribution and statistical models for Likert data, a correspondence analysis study using a doubling technique was proposed (Han, 2019). By quantifying the examiners and subjects, and expressing the result using a graphic technique, it was easy to visually recognize and interpret geometrically clear meaning. However, for the method proposed by Han (2019), the stability evaluation for quantification analysis results has not yet been developed. Therefore, in order to develop a methodology for the stability evaluation of the materialistic method for Likert data analysis, which is often seen in real life such as public opinion surveys or consumer preference surveys, but lacks development of analysis methods, and to show its usefulness through case analysis do.
Causality Change in Life Insurance Demand: Focusing on Financial Market and Insurance Provider Factors
Authors:   The Korean Data Analysis Society, Kwon Tae Yeon
Published: February 2023

This paper examined the Granger causality and changes in its intensity for Korea life insurance demand, focusing on the financial market and insurance provider factors. The significant causality ratio (SCR) in Kwon (2018), which can measure the intensity as well as the change in the significance of Granger causality, was applied. The intensity of the Granger causality of the three-year treasury bond rate, three-year AA corporate bond rate, KOSPI200 index, and number of planners was examined for each life insurance demand from January 1997 to May 2022. The change in the intensity of Granger causality for life insuance demand were visualized through the time plot of SCR by demand factor and life insurance type which are endowment, pure-endowment insurances and insurance against death, respectively. As a result, it was confirmed that the existence and intensity of Granger causality of each demand factor for each insurance type changed, and the pattern of change varies by factor and life insurance type. The factor with higher Granger causality than other periods in the global financial crisis is the interest rate and the Granger causality of the number of planners showed the opposite pattern. The Granger causality of the stock index for insurance against death was lower than that of other insurances.
A Study on the Settling-up of Quarterly Earnings in the Insurance Industry
Authors:   The Korean Data Analysis Society, Cho Seokhee
Published: February 2023

This paper analyzed how the unique accounting method and accounting environment of insurer different from non-financial companies affect earnings pattern of quarterly earnings by focusing on the settling-up effect using data from the past 34 quarters of domestic insurers. And the analysis was conducted by testing whether 4th quarter's degree of response between sales and expenses differs from other quarters. As a result of the analysis, it was found that the settling-up effect occurred in the insurance industry and these effect tended to be differentiated in the 4th quarter compared to interim quarters, and this differentiation was intensifying in the non-life insurance industry. These results are interpreted to be due to the difference between in interim and annual statements and the use of cash and accrual base accounting. In addition, this is interpreted to be more pronounced in the non-life insurance industry, where the complexity of payment process and the probability of earnings managements related to the loss reserves are high. The results are significant in that it compares and analyzed the characteristics of insurance accounting information in the transitional stage of converting to full accrual basis with the adoption of IFRS 17 and predicts changes in insurance accounting information.
Analysis of Educational Needs for Rights of Nursing Students in Clinical Practice
Authors:   The Korean Data Analysis Society, Park Sunghee
Published: February 2023

The purpose of this study was to identify the educational needs for rights of nursing students in clinical practice; first, it was to examine the difference between the important and current level of educational needs, and second, to identify the priority of educational needs. The subjects were 113 nursing students in 3rd and 4th grade enrolled in the department of nursing in Seoul, and were recruited using a convenient sampling method. The scale to measure the educational needs for rights of nursing students was developed by reviewing the previous literatures and verifying the content validity of five experts. The data were analyzed using the SPSS Win 24 program, the difference between the important and current level of educational needs was analyzed using a paired t-test. To analyze priorities of the educational needs, IPA, the Locus for Focus model analysis, and Borich analysis method were used. The priorities of the educational needs finally derived were 'Guaranteed rights to learn', 'Practicing with respect', 'Opportunities to observe and perform nursing skills', 'Establishment of protection management system', 'Awareness of the rights to learn', and 'Fairness of clinical leader's practice evaluation'. Nursing students hope that their rights to learn will be guaranteed in clinical practice education and fair evaluation will be made, and they recognize the need for a system that can protect them for safe clinical practice. In the future, based on the results of this study, it is necessary to develop a program to promote the rights awareness of nursing students in clinical practice and conduct research attempts to verify their effectiveness.
Anomaly Detection of Cruise Phase Altitude Break Away using MARS and PAM
Authors:   The Korean Data Analysis Society, Mun Seong Il , Ko Young Ho , Park Ji Hun , Park Heon Jin
Published: February 2023

Recently, methods for analyzing and detecting precursor signs of aviation accidents through navigation data have been studied. However, most of the studies are limited to the takeoff and landing stages, and there are no rules specifying the cruise stage, so the cruise stage search studies are rare. At this stage, break away according to altitude and path rather than speed occur, and in this paper, we try to detect break away in altitude of cruise stage by clustering method. In the ADS-B flight data received from January to December 2019, 10% of flights from Jeju Airport to Gimpo Airport, the most frequently operated domestic flights, were sampled and studied about 4,400 flights. Through the Multivariate Adaptive Regression Splines (MARS) model and the simple linear regression model, the slope between the trajectories was calculated to define the cruise slope, an interval that can be defined as the cruise stage. In addition, the non-similarity between flights was calculated using the distance measurements, EDR and DTW. Two cluster methods were used: PAM, Hierarchical clustering, and flights were clustered through PAM with the largest average silhouette width. An outlier was determined through a non-similar value between the center of the cluster classified through PAM and the flights within the cluster, and about 12% of flights were detected. It is expected to be able to prevent aviation accidents by detecting altitude break away, one of the premonitory signs, earlier. In subsequent studies, outlier detection can be carried out using a Semi-supervised learning method to detect outliers based on normal data collected with the help of experts in the aviation field.
Zero Imputation Methods for Log-transformation of Independent Variables
Authors:   The Korean Data Analysis Society, Park Seo Young
Published: February 2023

In studies in medical science or public health, it is common to apply log-transformation to independent variables that have severely right-skewed distribution. Among such variables, lab values have skewed distribution but have zeros due to limit of detection, which makes it impossible to apply log-transformation directly. There have been various methods proposed to deal with such situation, but most of these methods are rarely used in practice because they usually require additional step in calculation. In this study, five methods that removes zeros (shift by 1, shift by half of the smallest nonzero, shift by square root of the smallest nonzero, replace zeros with half of the smallest nonzero, replace zeros with square root of the smallest nonzero are presented. To compare performances of these methods we performed a simulation study based on randomly generated data with independent variable with log-normal distribution and response variable which has linear relationship with the independent variable, Shift by 1 method has the worst performance, and overall shift by half of the smallest nonzero method and replace zeros with half of the smallest nonzero method showed most stable performances.
The Causality between Economic Sanctions and Militarized Conflict: A Global Level Analysis, 1945-2014
Authors:   The Korean Data Analysis Society, Park Johann
Published: February 2023

Sanctions and militarized disputes remain two of the most acute forms of interstate hostilities that may destabilize the contemporary interstate system. Although scholars and policy makers have discussed the potential reciprocal relationship between sanctions and conflict, extant theoretical and empirical examinations remain unsatisfactory. Their theoretical arguments are cursory and their empirical evidence is scant. How do sanctions and militarized disputes affect each other? Do more economic hostilities in the world suggest more military hostilities in the world, and vice versa? This study arranges a set of theoretical arguments for the possible causality. Using a VAR-Granger causality test method, it assesses the two-way causality at the macro-global system level for the 1945-2014 period. It also divides the entire data into the Cold War and post-Cold War samples to address a structural break. The results show that sanctions promote militarized disputes but this impact is limited to the post-Cold War era. The impact of military conflict on sanctions is insignificant with the pooled 1945-2014 sample. However, the divided samples reveal the contrasting double-faced effects for militarized disputes promoting sanctions in the Cold War era but discouraging sanctions in the post-Cold War era.
South Africa Education Data and Visualisations
Authors: Combrink Herkulaas , Carr Elizabeth , wet Katinka de , Marivate Vukosi , Rosman Benjamin
Published: February 2023

  

The tabular and visual dataset focuses on South African basic education and provides insights into the distribution of schools and basic population statistics across the country. This tabular and visual data are stratified across different quintiles for each provincial and district boundary. The quintile system is used by the South African government to classify schools based on their level of socio-economic disadvantage, with quintile 1 being the most disadvantaged and quintile 5 being the least disadvantaged. The data was joined by extracting information from the debarment of basic education with StatsSA population census data. Thereafter, all tabular data and geo located data were transformed to maps using GIS software and the Python integrated development environment. The dataset includes information on the number of schools and students in each quintile, as well as the population density in each area. The data is displayed through a combination of charts, maps and tables, allowing for easy analysis and interpretation of the information.
Detailed Analysis of the TeV γ-Ray Sources 3HWC J1928+178, 3HWC J1930+188, and the New Source HAWC J1932+192
Authors: Albert A. , Alfaro R. , Alvarez C. , Arteaga-Velázquez J. C. , Rojas D. Avila , Solares H. A. Ayala , Babu R. , Belmont-Moreno E. , Brisbois C. , Caballero-Mora K. S. , Capistrán T. , Carramiñana A. , Casanova S. , Chaparro-Amaro O. , Cotti U. , Cotzomi J. , de León S. Coutiño , De la Fuente E. , de León C. , Hernandez R. Diaz , Díaz-Vélez J. C. , Dingus B. L. , DuVernois M. A. , Durocher M. , Engel K. , Espinoza C. , Fan K. L. , Alonso M. Fernández , Fraija N. , García-González J. A. , Garfias F. , Goksu H. , González M. M. , Goodman J. A. , Harding J. P. , Hernandez S. , Hinton J. , Hona B. , Huang D. , Hueyotl-Zahuantitla F. , Hüntemeyer P. , Iriarte A. , Jardin-Blicq A. , Joshi V. , Kaufmann S. , Kieda D. , Lee W. H. , Vargas H. León , Linnemann J. T. , Longinotti A. L. , Luis-Raya G. , López-Coto R. , Malone K. , Marandon V. , Martinez O. , Martínez-Castro J. , Matthews J. A. , Miranda-Romagnoli P. , Morales-Soto J. A. , Moreno E. , Mostafá M. , Nayerhoda A. , Nellen L. , Newbold M. , Nisa M. U. , Noriega-Papaqui R. , Olivera-Nieto L. , Omodei N. , Peisker A. , Araujo Y. Pérez , Pérez-Pérez E. G. , Rho C. D. , Rosa-González D. , Ruiz-Velasco E. , Salazar H. , Salazar-Gallegos D. , Greus F. Salesa , Sandoval A. , Schneider M. , Serna-Franco J. , Smith A. J. , Son Y. , Springer R. W. , Tibolla O. , Tollefson K. , Torres I. , Torres-Escobedo R. , Turner R. , Ureña-Mena F. , Villaseñor L. , Wang X. , Werner F. , Willox E. , Zhou H. ,   HAWC collaboration
Published: February 2023

The latest High Altitude Water Cherenkov (HAWC) point-like source catalog up to 56 TeV reported the detection of two sources in the region of the Galactic plane at galactic longitude 52° < ℓ < 55°, 3HWC J1930+188 and 3HWC J1928+178. The first one is associated with a known TeV source, the supernova remnant SNR G054.1+00.3. It was discovered by one of the currently operating Imaging Atmospheric Cherenkov Telescope (IACT), the Very Energetic Radiation Imaging Telescope Array System (VERITAS), detected by the High Energy Stereoscopic System (H.E.S.S), and identified as a composite SNR. However, the source 3HWC J1928+178, discovered by HAWC and coincident with the pulsar PSR J1928+1746, was not detected by any IACT despite their long exposure on the region, until a recent new analysis of H.E.S.S. data was able to confirm it. Moreover, no X-ray counterpart has been detected from this pulsar. We present a multicomponent fit of this region using the latest HAWC data. This reveals an additional new source, HAWC J1932+192, which is potentially associated with the pulsar PSR J1932+1916, whose γ-ray emission could come from the acceleration of particles in its pulsar wind nebula. In the case of 3HWC J1928+178, several possible explanations are explored, in an attempt to unveil the origins of the very-high-energy γ-ray emission.
Mid-IR Observations of IRAS, AKARI, WISE/NEOWISE, and Subaru for Large Icy Asteroid (704) Interamnia: A New Perspective of Regolith Properties and Water Ice Fraction
Authors: Haoxuan Jiang , Jianghui Ji , Liangliang Yu , Bin Yang , Shoucun Hu , Yuhui Zhao
Published: February 2023

(704) Interamnia is one of the largest asteroids located in the outer main-belt region, which may contain a large amount of water ice underneath its surface. We observe this asteroid using 8.2 m Subaru telescope at mid-infrared wave bands and utilize a thermophysical model for realistic surface layers to analyze mid-infrared data from Subaru along with those of IRAS, AKARI, and Wide-field Infrared Survey Explorer (WISE)/NEOWISE. We optimize the method to convert the WISE magnitude to thermal infrared flux with temperature-dependent color corrections, which can provide significant references for main-belt asteroids at a large heliocentric distance with low surface temperature. We derive best-fitting thermal parameters of Interamnia—a mean regolith grain size of

190

−
180

+
460

μm, with a roughness of

0.30

−
0.17

+
0.35

and rms slope of

27

−
9

+
13

deg, thereby producing thermal inertia ranging from 9 to 92 Jm−2 s−1/2 K−1 due to seasonal temperature variation. The geometric albedo and effective diameter are evaluated to be

0.0472

−
0.0031

+
0.0033

and

339

−
11

+
12

km

, respectively, being indicative of a bulk density of 1.86 ± 0.63 g cm−3. The low thermal inertia is consistent with typical B/C-type asteroids with D ≥ 100 km. The tiny regolith grain size suggests the presence of a fine regolith on the surface of Interamnia. Moreover, the seasonal and diurnal temperature distribution indicates that thermal features between the southern and northern hemispheres appear to be very different. Finally, we present an estimation of volume fraction of water ice of 9%–66% from the published grain density and porosity of carbonaceous chondrites.
Early-forming Massive Stars Suppress Star Formation and Hierarchical Cluster Assembly
Authors: Lewis Sean C. , McMillan Stephen L. W. , Low Mordecai-Mark Mac , Cournoyer-Cloutier Claude , Polak Brooke , Wilhelm Martijn J. C. , Tran Aaron , Sills Alison , Zwart Simon Portegies , Klessen Ralf S. , Wall Joshua E.
Published: February 2023

Feedback from massive stars plays an important role in the formation of star clusters. Whether a very massive star is born early or late in the cluster formation timeline has profound implications for the star cluster formation and assembly processes. We carry out a controlled experiment to characterize the effects of early-forming massive stars on star cluster formation. We use the star formation software suite Torch, combining self-gravitating magnetohydrodynamics, ray-tracing radiative transfer, N-body dynamics, and stellar feedback, to model four initially identical 104
M
⊙ giant molecular clouds with a Gaussian density profile peaking at 521.5 cm−3. Using the Torch software suite through the AMUSE framework, we modify three of the models, to ensure that the first star that forms is very massive (50, 70, and 100 M
⊙). Early-forming massive stars disrupt the natal gas structure, resulting in fast evacuation of the gas from the star-forming region. The star formation rate is suppressed, reducing the total mass of the stars formed. Our fiducial control model, without an early massive star, has a larger star formation rate and total efficiency by up to a factor of 3, and a higher average star formation efficiency per freefall time by up to a factor of 7. Early-forming massive stars promote the buildup of spatially separate and gravitationally unbound subclusters, while the control model forms a single massive cluster.
A Simulation Study of Ultra-relativistic Jets. III. Particle Acceleration in FR-II Jets
Authors: Seo Jeongbhin , Ryu Dongsu , Kang Hyesung
Published: February 2023

We study the acceleration of ultra-high-energy cosmic rays (UHECRs) in Class II Fanaroff–Riley (FR-II) radio galaxies by performing Monte Carlo simulations for the transport, scattering, and energy change of CR particles injected into time-evolving jet flows that are realized through relativistic hydrodynamic simulations. Toward that end, we adopt physically motivated models for the magnetic field and particle scattering. By identifying the primary acceleration process among diffusive shock acceleration (DSA), turbulent shear acceleration (TSA), and relativistic shear acceleration (RSA), we find that CRs of E ≲ 1 EeV gain energy mainly through DSA in the jet‐spine flow and backflow containing many shocks and turbulence. After they attain E ≳ a few exaelectronvolts, CRs are energized mostly via RSA at the jet–backflow interface, reaching energies well above 1020 eV. TSA makes a relatively minor contribution. The time-asymptotic energy spectrum of escaping particles is primarily governed by the jet power, shifting to higher energies at more powerful jets. The UHECR spectrum fits well to a double power-law form, whose break energy, E
break, corresponds to the size-limited maximum energy. It is close to

d


/

dE
∝

E

−
0.5

below E
break, while it follows

d


/

dE
∝

E

−
2.6

above E
break, decreasing more gradually than the exponential. The power-law slope of the high-energy end is determined by energy boosts via non-gradual shear acceleration across the jet–backflow interface and confinement by an elongated cocoon. We conclude that giant radio galaxies could be major contributors to the observed UHECRs.
Relating Energetic Ion Spectra to Energetic Neutral Atoms
Authors: Wang Bingbing , Zank Gary P. , Shrestha Bishwas L. , Kornbleuth Marc , Opher Merav
Published: February 2023

Heliospheric energetic neutral atoms (ENAs) originate from energetic ions that are neutralized by charge exchange with neutral atoms in the heliosheath and very local interstellar medium (VLISM). Since neutral atoms are unaffected by electromagnetic fields, they propagate ballistically with the same speeds as parent particles. Consequently, measurements of ENA distributions allow one to remotely image the energetic ion distributions in the heliosheath and VLISM. The origin of the energetic ions that spawn ENAs is still debated, particularly at energies higher than ∼keV. In this work, we summarize five possible sources of energetic ions in the heliosheath that cover the ENA energy from a few keV to hundreds of keV. Three sources of the energetic ions are related to pickup ions (PUIs): those PUIs transmitted across the heliospheric termination shock (HTS), those reflected once or multiple times at the HTS, i.e., reflected PUIs, and those PUIs multiply reflected and further accelerated by the HTS. Two other kinds of ions that can be considered are ions transmitted from the suprathermal tail of the PUI distribution and other particles accelerated at the HTS. By way of illustration, we use these energetic particle distributions, taking account of their evolution in the heliosheath, to calculate the ENA intensities and to analyze the characteristics of ENA spectra observed at 1 au.
The Effect of Flow and Magnetic Twist on Resonant Absorption of Slow MHD Waves in Magnetic Flux Tubes
Authors: Sadeghi Mohammad , Bahari Karam , Karami Kayoomars
Published: February 2023

Observations show that there are twisted magnetic flux tubes and plasma flow throughout the solar atmosphere. The main purpose of this work is to obtain the damping rate of sausage modes in the presence of magnetic twist and plasma flow. We obtain the dispersion relation for sausage modes in slow continuity in an inhomogeneous layer under the conditions of magnetic pores, then we solve it numerically. For the selected density profile, the magnetic field, and the plasma flow as a function of radius across the inhomogeneous layer, we show that the effect of the twisted magnetic field on the resonance absorption at low speed of the plasma flow is greater than one at high speed.
SN 2020uem: a Possible Thermonuclear Explosion within a Dense Circumstellar Medium (II). The Properties of the CSM from Polarimetry and Light-curve Modeling
Authors: Uno Kohki , Nagao Takashi , Maeda Keiichi , Kuncarayakti Hanindyo , Tanaka Masaomi , Kawabata Koji S. , Nakaoka Tatsuya , Kawabata Miho , Yamanaka Masayuki , Aoki Kentaro , Isogai Keisuke , Ogawa Mao , Tajitsu Akito , Imazawa Ryo
Published: February 2023

Type IIn/Ia-CSM supernovae (SNe IIn/Ia-CSM) are classified by their characteristic spectra, which exhibit narrow hydrogen emission lines originating from strong interaction with a circumstellar medium (CSM) together with broad lines of intermediate-mass elements. We performed intensive follow-up observations of SN IIn/Ia-CSM 2020uem, including photometry, spectroscopy, and polarimetry. In this paper, we focus on the results of polarimetry. We performed imaging polarimetry at 66 days and spectropolarimetry at 103 days after discovery. SN 2020uem shows a high continuum polarization of 1.0%–1.5% without wavelength dependence. Besides, the polarization degree and position angle keep roughly constant. These results suggest that SN 2020uem is powered by strong interaction with a confined and aspherical CSM. We performed simple polarization modeling, based on which we suggest that SN 2020uem has an equatorial-disk/torus CSM. Besides, we performed semi-analytic light-curve modeling and estimated the CSM mass. We revealed that the mass-loss rate in the final few hundred years immediately before the explosion of SN 2020uem is in the range of 0.01–0.05 M
⊙ yr−1, and that the total CSM mass is 0.5–4 M
⊙. The CSM mass can be accommodated by not only a red supergiant (RSG), but also by a red giant (RG) or an asymptotic giant branch (AGB) star. As a possible progenitor scenario of SN 2020uem, we propose a white dwarf binary system including an RG, RSG, or AGB star, especially a merger scenario via common envelope evolution, i.e., the core-degenerate scenario or a variant.
A New Stellar Mass Proxy for Subhalo Abundance Matching
Authors: Chuang Chen-Yu , Lin Yen-Ting
Published: February 2023

Subhalo abundance matching (SHAM) has played an important role in improving our understanding of how galaxies populate their host dark matter halos. In essence, the SHAM framework is to find a dark matter halo property that best correlates with an attribute of galaxies, such as stellar mass. The peak value of the maximum circular velocity (

V

max

) a halo/subhalo has ever attained throughout its lifetime, V
peak, has been a popular choice for SHAM. A recent study by Tonnesen & Ostriker suggested that quantity ϕ, which combines the present-day

V

max

and the peak value of halo dark matter mass, performs better in predicting stellar mass than V
peak. Inspired by their approach, in this work, we find that further improvement can be achieved by a quantity ψ
5 that combines the 90th percentile of

V

max

a halo/subhalo has ever achieved with the 60th percentile of the dark matter halo time variation rate. Tests based on the simulation TNG300 of the IllustrisTNG project show that our new SHAM scheme, with just three free parameters, can improve the stellar mass prediction and mass-dependent clustering by 15% and 18% from ϕ, respectively, over the redshift range z = 0–2.
Plant diversity in traditional agroecosystems of North Morocco
Authors: Chakkour Soufian , Bergmeier Erwin , Meyer Stefan , Kassout Jalal , Kadiri Mohamed , Ater Mohammed
Published: February 2023

Questions: While globalisation favours intensive yield-maximizing agriculture with cropping practices that entail agrobiodiversity loss, extensive production systems still exist in areas of marginal lands such as in mountainous regions or islands. It is overdue to study such systems, their sustainability and ecology as potential models for decentralized environmentally balanced land-use. For that purpose, we investigated the composition of the wild arable (segetal) flora in traditional thermo- to mesomediterranean cereal-growing agroecosystems of northwestern Morocco. Study area: The Tingitane (Tangier) Peninsula in the Northwest of Morocco. Methods: A sample of 94 relevés was collected in six areas in the foreland of the Rif Mountains. Results: We found 209 species in 150 genera and 41 families, a mean of 22 species per relevé and a Shannon index of 3.04±0.06. A TWINSPAN classification revealed a high level of similarity between the areas, with the plant communities corresponding to the order Brometalia rubenti-tectorum, but also differences in species composition as a result of climatic, soil and land-use effects. Therophytes dominated, but biennial and perennial herbs indicating shallow tillage and fields under fallow were also common. Almost half of the species found were agrestal species (confined to arable fields), and almost a third were apophytes (native species occurring in fields but also in natural habitats). Twenty-nine species (14%) of the segetal flora were regional endemics and six are considered nationally rare. Although there is evidence of recent structural and floristic diversity decline, traditional agroecosystems tend to favour native species including some of particular conservation interest. Conclusions: The traditional agroecosystems of the Rif Mountains fulfil criteria of High Nature Value agriculture but, in view of recent socio-economic change, require support by policy for their maintenance.

Taxonomic reference: Euro+Med PlantBase (http://www.europlusmed.org) [accessed 26 Nov 2022].

Syntaxonomic reference: EuroVegChecklist (Mucina et al. 2016).

Abbreviations: TWINSPAN = Two Way Indicator Species Analysis.
Une traversée à deux : le couple face au cancer
Authors: Proia-Lelouey Nadine , Letrecher Sandrine
Published: February 2023

Dans la suite d’écrits antérieurs, nous poursuivons nos investigations cliniques sur le vécu des couples confrontés au cancer décliné dans ses différents temps : de l’annonce du diagnostic à la rémission ou au palliatif. Incitées par l’argumentaire, nous avons choisi de le faire par le biais d’une œuvre de fiction. En l’occurrence, une autofiction, ce qui a nous permis d’enrichir un autre axe de nos réflexions, celui de la fonction (thérapeutique ?) de l’écriture dans la maladie.
Dispositifs biographiques et pouvoir d’agir : quelles trans-formations pour des jeunes en situation de raccrochage scolaire ?
Authors: Melin Valérie
Published: February 2023

Revenir au métier d’élève suppose de rompre avec les pratiques, les représentations et les modes de relation qui ont pu conduire au décrochage. L’enjeu du raccrochage scolaire pour l’élève et l’enseignant concerne la nature de ce changement qui peut se réduire à une adaptation réussie aux normes scolaires et sociales attendues ou favoriser la fondation d’un nouveau rapport à soi-même, mobilisant un pouvoir d’agir autorisant des déplacements créateurs dans les représentations, dans les postures et dans l’action. On analysera comment la recherche biographique en éducation dans ses dimensions théoriques et pratiques peut contribuer à l’émergence d’un processus de subjectivation émancipateur.
Immigrés et réfugiés : déplacements subjectifs et territoriaux à l’interface entre désir et politique
Authors: Debieux Rosa Miriam
Published: February 2023

La question de l’immigration et du refuge, sous ses aspects culturels, subjectifs et politiques, s’est imposée comme thématique prioritaire dans de nombreux domaines d’études et s’affirme même dans l’agenda politique électoral de nombreux pays, y compris au Brésil. L’arrivée d’immigrés en grand nombre a généré des tensions sociales et politiques, notamment en raison de l’intensification de la ségrégation et de l’incitation à la fermeture des frontières. L’importance de l’immigration dans la construction sociale, comme rencontre avec l’altérité à travers d’autres cultures et d’autres langues, est négligée dans ce processus. Cet article met en lumière trois aspects de notre recherche sur les immigrés et les réfugiés dans la ville de São Paulo (Brésil) : d’une part l’incitation politique à la haine envers la figure de l’immigré, et la façon dont cette haine impacte le sujet et renforce sa souffrance sociopolitique et sa détresse ( Hilflosigkeit ) discursive. D’autre part, les interfaces entre les déplacements territoriaux et psychiques qui, dans le jeu métaphorique et métonymique, situent le lieu du symptôme et du désir. Ces processus, articulés au lieu politique, définissent des modalités de territorialisation ou des assimilations aliénées. Enfin, ces processus révèlent la contribution de l’immigré aux défis contemporains, dont la nécessaire construction d’une coexistence avec l’altérité et la différence.
Le refus de l’étranger. Migrations, discours et exclusions dans la subjectivité néolibérale
Authors: Giannica Davide , Inticher Binkowski Gabriel , Moro Marie Rose
Published: February 2023

Dans cet article nous tenterons de rendre compte d’anciennes et de nouvelles formes de discrimination à l’œuvre aujourd’hui, afin d’appréhender le refus de l’étranger dans les pays de transit et de destination des flux migratoires actuels, mais aussi le refus de l’altérité rencontré sous plusieurs formes dans les sociétés de départ. Nous explorerons les dynamiques discursives de production de l’exclusion à travers le refus du radicalement autre et la radicalisation des « petites différences », en vue de construire une topologie de l’usage de l’étranger dans le maintien et la légitimation des inégalités dans les cultures où le néolibéralisme est devenu une idéologie centrale. Dans ce but, nous nous concentrerons sur l’actualité des vagues migratoires pour montrer comment le néolibéralisme provoque une homogénéisation des processus biopolitiques concernant la gestion des populations. Nous envisagerons comment cette idéologie vise à promouvoir une gestion du sujet étranger lui assignant un lieu social, politique et subjectif abject, dans lequel le sujet subit des effets de détresse discursive (Rosa, 2016).
Du discours au dispositif
Authors: Damian-Gaillard Béatrice , Vörös Florian
Published: February 2023

Cet article propose une introduction aux queer media studies , qui interrogent le rôle des technologies médiatiques dans la production et la contestation d’un ordre social hétéronormé, structuré par des hiérarchies entre les sexes et entre les sexualités, elles-mêmes imbriquées dans des rapports de classe et de racialisation. Une première partie présente l’apport de l’approche anti-essentialiste des relations de pouvoir élaborée par Michel Foucault, qui permet de sortir de la double impasse qui consiste d’un côté à valoriser toute expression publique de la sexualité comme une forme de libération et, de l’autre, à vouloir purifier la sexualité de toute relation de pouvoir. Quatre domaines de recherche sont ensuite passés en revue : l’analyse discursive des représentations médiatiques, l’approche par les affects des enquêtes en réception, les approches par la matérialité de la technique et enfin les enquêtes sur la production et la régulation des médias. La conclusion précise que la sexualité est une dimension transversale de la vie sociale, qui concerne potentiellement toutes les recherches sur les médias et les technologies de communication.
Digital education, geography and multidisciplinarity: Themes, methods and critical issues
Authors: Mercatanti Leonardo , Sabato Gaetano
Published: February 2023

The article is the Editorial of the Special Issue "Digital Education, Geography and Multidisciplinarity: Themes, Methods and Critical Issues". It explores some fundamental and theoretical issues on the interrelated subjects of digital education, geography and multidisciplinarity. More in particular, the article takes into account the manner in which this Special Issue of AIMS Geosciences reflects on links between the teaching/learning of geography (at any school/university level) and the digital world in a multidisciplinary perspective. That includes both the critical issues and the advantages in terms of sustainability and greater awareness of geographical phenomena, also in relation to cultural dynamics (e.g., migrations, urban transformations, development, geopolitics, tourism).
Existence of fuzzy fixed points of set-valued fuzzy mappings in metric and fuzzy metric spaces
Authors: Kanwal Shazia , Ali Asif , Mazrooei Abdullah Al , Santos-Garcia Gustavo
Published: February 2023

A contemporary fuzzy technique is employed in the current study to generalize some established and recent findings. For researchers, fixed point (FP) procedures are highly advantageous and appealing mechanisms. Discovering fuzzy fixed points of fuzzy mappings (FM) meeting Nadler's type contraction in complete fuzzy metric space (FMS) and?iri? type contraction in complete metric spaces (MS) is the core objective of this research. The outcomes are backed up by example and applications that highlight these findings. There are also preceding conclusions that are given as corollaries from the relevant literature. In this mode, numerous consequences exist in the significant literature are extended and combined by our findings.
Sensitive analysis of soliton solutions of nonlinear Landau-Ginzburg-Higgs equation with generalized projective Riccati method
Authors: Asjad Muhammad Imran , Majid Sheikh Zain , Faridi Waqas Ali , Eldin Sayed M.
Published: February 2023

The study aims to explore the nonlinear Landau-Ginzburg-Higgs equation, which describes nonlinear waves with long-range and weak scattering interactions between tropical tropospheres and mid-latitude, as well as the exchange of mid-latitude Rossby and equatorial waves. We use the recently enhanced rising procedure to extract the important, applicable and further general solitary wave solutions to the formerly stated nonlinear wave model via the complex travelling wave transformation. Exact travelling wave solutions obtained include a singular wave, a periodic wave, bright, dark and kink-type wave peakon solutions using the generalized projective Riccati equation. The obtained findings are represented as trigonometric and hyperbolic functions. Graphical comparisons are provided for Landau-Ginzburg-Higgs equation model solutions, which are presented diagrammatically by adjusting the values of the embedded parameters in the Wolfram Mathematica program. The propagating behaviours of the obtained results display in 3-D, 2-D and contour visualization to investigate the impact of different involved parameters. The velocity of soliton has a stimulating effect on getting the desired aspects according to requirement. The sensitivity analysis is demonstrated for the designed dynamical structural system's wave profiles, where the soliton wave velocity and wave number parameters regulate the water wave singularity. This study shows that the method utilized is effective and may be used to find appropriate closed-form solitary solitons to a variety of nonlinear evolution equations (NLEEs).
Emissions minimization on road networks via Generic Second Order Models
Authors: Balzotti Caterina , Briani Maya , Piccoli Benedetto
Published: February 2023

In this paper we consider the problem of estimating emissions due to vehicular traffic on complex networks, and minimizing their effect by regulating traffic at junctions. For the traffic evolution, we consider a Generic Second Order Model, which encompasses the majority of two-equations (i.e., second-order) models available in the literature, and extend it to road networks with merge and diverge junctions. The dynamics on the whole network is determined by selecting a solution to the Riemann Problems at junctions, i.e., the Cauchy problems with constant initial data on each incident road. The latter are solved by assuming the maximization of the flow and assigning a traffic distribution coefficient for outgoing roads of diverges, and a priority rule for incoming roads of merges. A general emission model is considered and its parameters are tuned to the $ {\mathrm{NO_{x}}} $ emission rate. The minimization of emissions is then formulated in terms of the traffic distribution and priority parameters, taking into account travel times. A comparison is provided between roundabouts with optimized parameters and traffic lights, which correspond to time-varying traffic priorities. Our approach can be adapted to manage traffic in complex networks in order to reduce emissions while keeping travel time at acceptable levels.
Slovenska antropologija na pragu 21. stoletja: analiza tematskega polja skozi objave slovenskih antropologov
Authors: Naterer Andrej , Škerget Polonca , Verhovnik Luka
Published: February 2023

Izhajajoč iz temeljnega vprašanja, kaj je slovenska antropologija na pragu 21. stoletja, članek odkriva njene temeljne vsebinske značilnosti. Na podlagi analize vsebine 1162 znanstvenih člankov, poglavij, raziskovalnih poročil, poglavij v knjigah in knjig, objavljenih med letoma 2000 in 2021 in katerih avtorji so izbrani slovenski antropologi, članek detektira temeljne teme in tematske sklope ter na tej osnovi mapira vsebino, strukturo in povezanost polja slovenske antropologije. Rezultati kažejo, da: 1. je v slovenski antropologiji 25 tematskih sklopov, ki so po frekventnosti in kontinuiranosti razdeljeni v primarno, sekundarno in terciarno skupino; 2. da je polje slovenske antropologije sicer tematsko bogato in razgibano, vendar pa so teme razmeroma izolirane, ozko fokusirane in kažejo nizko stopnjo tematskega prepletanja; 3. da je polje močno feminizirano; 4. da ima nizko stopnjo mednarodnega dosega in pretežno osredinjeno na nacionalni kontekst ter 5. da ima tudi z vidika citiranosti razmeroma omejen znanstveni domet.
Assessing the Learning Outcomes of Robot-Assisted Second Language Learning
Authors: Geçkin Vasfiye
Published: February 2023

Robot-assisted language learning (RALL) explores the role of educational humanoid robots in the learning of first and second language(s). Today, there is no definitive answer as to its effectiveness in the long run. Some studies report that adult L2 learners benefit from RALL in learning words while children enjoy only small gains from vocabulary instruction. The kind of feedback humanoid robots can provide in an ongoing conversation merely goes beyond facial expressions or words of encouragement. The need to upgrade the skills of educational robots and concerns with data privacy and abusive behavior towards robots are some challenges faced in RALL today. Plus, not a single study examined the role of RALL in assessing the reading abilities and pragmatic knowledge of L2 learners. This chapter focuses on the effectiveness of RALL in assessing word learning, pragmatics, grammar, listening, speaking, and reading skills in an L2 and discusses its reflection for future classroom applications.
Teaching and Assessment in Young Learners' Classrooms
Authors: Haznedar Belma
Published: February 2023

Language learning in early childhood has been the subject of great interest both in first language (L1) and second language (L2) acquisition research. For the past 40 years, we have witnessed significant advances in the study of child language, with particular references to the cognitive, linguistic, psychological, pedagogical, and social aspects of child language. This chapter aims to shed light on some of the theoretical paradigms and their implications on language learning and assessment in young children whose exposure to another language begins early in life. In view of the diversity facing pedagogical practices worldwide, the authors aim to show the connection between classroom practices and assessment tools appropriate for young language learners, with special reference to formative and ongoing assessment.
Deep Learning Approach to New Age Cinematic Video Editing
Authors: Dutta Disha , Jawade Shrunkhala , Hussain Syed Mateen
Published: February 2023

This paper gives a new technique for video editing by introducing modules that are trained to create realistic and dramatic sky backgrounds in videos. This project is different from what is being used in the video editing ecosystem as it does not require any static photos or inertial measurements. The module can be simply used on any device without having any prerequisites in the device. This is a game- changer when it comes to capturing cinematic sky videos. This project is further branched into three different modules to segregate the different tasks including sky routing, flow reckoner, and image emulsifier. These methods will run in real- time and are user friendly. This project can generate high fidelity videos with different lighting and dramatics in outdoor environments. Adding further we can also easily synthesize different weather conditions. This editing technique is much simpler and easier giving a more aesthetic image for cinematic shots.
Crack Detection of Pharmaceutical Vials Using Agglomerative Clustering Technique
Authors: Vishwanatha C.R. , Asha V.
Published: February 2023

Pharmaceutical industries remain very profitable but defects in medicine vials are causing losses and adding extra overhead in quality management. In order to minimize these losses and overheads, companies need to find new ways of doing quality management for every vial produced. This paper presents a method for finding cracks on the vials using Agglomerative Clustering Technique. The technique successfully detects all types of cracks on the vials. The algorithm has achieved 100% accuracy in detection of cracks on the Pharmaceutical Vials and can have potential application in pharmaceutical industries in quality control.