bluuebunny/crossref_metadata_2025 huggingface dataset:
Relations between Mid-infrared Dust Emission and UV Extinction
Authors: Massa Derck , Gordon Karl D. , Fitzpatrick E. L.
Published: January 2022

We analyze low-resolution Spitzer infrared (IR) 5−14 μm spectra of the diffuse emission toward a carefully selected sample of stars. The sample is composed of sight lines toward stars that have well-determined ultraviolet (UV) extinction curves and that are shown to lie beyond effectively all of the extinguishing and emitting dust along their lines of sight. Our sample includes sight lines whose UV curve extinction curves exhibit a wide range of curve morphology and that sample a variety of interstellar environments. As a result, this unique sample enabled us to study the connection between the extinction and emission properties of the same grains, and to examine their response to different physical environments. We quantify the emission features in terms of the polycyclic aromatic hydrocarbon (PAH) model given by Draine & Li and a set on additional features not known to be related to PAH emission. We compare the intensities of the different features in the Spitzer mid-infrared spectra with the Fitzpatrick & Massa parameters that describe the shapes of UV to near-infrared extinction curves. Our primary result is that there is a strong correlation between the area of the 2175 Å UV bump in the extinction curves of the program stars and the strengths of the major PAH emission features in the mid-infrared spectra for the same lines of sight.
Frequency-resolved Lags in UV/Optical Continuum Reverberation Mapping
Authors: Cackett Edward M. , Zoghbi Abderahmen , Ulrich Otho
Published: January 2022

In recent years, continuum-reverberation mapping involving high-cadence UV/optical monitoring campaigns of nearby active galactic nuclei has been used to infer the size of their accretion disks. One of the main results from these campaigns has been that in many cases the accretion disks appear too large, by a factor of 2–3, compared to standard models. Part of this may be due to diffuse continuum emission from the broad-line region (BLR), which is indicated by excess lags around the Balmer jump. Standard cross-correlation lag-analysis techniques are usually used to just recover the peak or centroid lag and cannot easily distinguish between reprocessing from the disk and BLR. However, frequency-resolved lag analysis, where the lag is determined at each Fourier frequency, has the potential to separate out reprocessing on different size scales. Here we present simulations to demonstrate the potential of this method and then apply a maximum-likelihood approach to determine frequency-resolved lags in NGC 5548. We find that the lags in NGC 5548 generally decrease smoothly with increasing frequency, and are not easily described by accretion-disk reprocessing alone. The standard cross-correlation lags are consistent with lags at frequencies lower than 0.1 day−1, indicating they are dominated from reprocessing at size scales greater than ∼10 light days. A combination of a more distant reprocessor, consistent with the BLR, along with a standard-sized accretion disk is more consistent with the observed lags than a larger disk alone.
Simulating the Ion-trapping Acceleration at Rippled Reconnection Fronts
Authors: Bai Kun , Yu Yiqun , Huang Hongtao , Cao Jinbin
Published: January 2022

Reconnection fronts (RFs) play a vital role in particle acceleration and energy transport in the terrestrial magnetosphere. It is widely believed that RFs have planar monotonic profiles that determine the particle dynamics. However, recent in situ studies have revealed that the front surface is not planar as expected but rather rippled. How the surface irregularities of RFs’ impact particle energization and transport is still an open issue. Using a particle-tracing technique, we traced the trajectories of ions near fronts with or without surface ripples at different scales to understand how ions are mediated by such rippled structures. We find that the ion relative energy gain increases considerably when the rippled surface of RFs appears. The main acceleration mechanism is ion-trapping acceleration, in which ions are confined at the RFs for a longer time by the rippled structure and are accelerated by the duskward electric field. Moreover, ions can be accelerated effectively when their gyroradius is comparable to the size of the ripple. Formulas of relative energy gain as a function of the ripple size are presented.
Clouds of Spacecraft Debris Liberated by Hypervelocity Dust Impacts on Parker Solar Probe
Authors: Malaspina David M. , Stenborg Guillermo , Mehoke Doug , Al-Ghazwi Adel , Shen Mitchell M. , Hsu Hsiang-Wen , Iyer Kaushik , Bale Stuart D. , Dudok de Wit Thierry
Published: January 2022

Hypervelocity impacts on spacecraft surfaces produce a wide range of effects including transient plasma clouds, surface material ablation, and for some impacts, the liberation of spacecraft material as debris clouds. This study examines debris-producing impacts on the Parker Solar Probe spacecraft as it traverses the densest part of the zodiacal cloud: the inner heliosphere. Hypervelocity impacts by interplanetary dust grains on the spacecraft that produce debris clouds are identified and examined. Impact-generated plasma and debris strongly perturb the near-spacecraft environment, producing distinct signals on electric, magnetic, and imaging sensors, as well as anomolous behavior of the star tracker cameras used for attitude determination. From these data, the spatial distribution, mass, and velocity of impactors that produce debris clouds are estimated. Debris-cloud expansion velocity and debris fragment sizes are constrained by the observational data, and long-duration electric potential perturbations caused by debris clouds are reported, along with a hypothesis for their creation. Impact-generated plasma-cloud expansion velocities, as well as pickup acceleration by the solar wind and driven plasma waves are also measured. Together, these observations produce a comprehensive picture of near-spacecraft environmental perturbations in the aftermath of a hypervelocity impact.
A Time-dependent Self-similar Reconstruction of Solar Coronal Mass Ejections Based on the Gibson–Low Model
Authors: Dai Xinghua
Published: January 2022

The analytic Gibson–Low (GL) model, a time-dependent self-similar solution of the magnetohydrodynamics, is first used to directly reconstruct a coronal mass ejection (CME) through the method of forward modeling in this study. A systematic description of the GL model is presented at the beginning, and a set of parameters is introduced to define the model. Then a CME on 2011 March 7 is reconstructed by fitting of GL (FGL) of the multi-viewpoint and time series observations. The first step of FGL is the initialization of the location and orientation of the GL using the information of the CME source region. The second step is to fit the parameters of size, shape, velocity, and strength of the magnetic field of the GL to the observations of coronagraphs at 20:24 and 20:39. The GL at 20:54 and 3 R
⊙ is generated through the theory of self-similar expansion respectively. Comparisons between the synthetic images of the GL and the real observations of the CME prove the performance of FGL that the reconstructions well match the observations.
Examining Two-dimensional Luminosity–Time Correlations for Gamma-Ray Burst Radio Afterglows with VLA and ALMA
Authors: Levine Delina , Dainotti Maria , Zvonarek Kevin J. , Fraija Nissim , Warren Donald C. , Chandra Poonam , Lloyd-Ronning Nicole
Published: January 2022

Gamma-ray burst (GRB) afterglow emission can be observed from sub-TeV to radio wavelengths, though only 6.6% of observed GRBs present radio afterglows. We examine GRB radio light curves (LCs) to look for the presence of radio plateaus resembling the plateaus observed at X-ray and optical wavelengths. We analyze 404 GRBs from the literature with observed radio afterglow and fit 82 GRBs with at least five data points with a broken power-law model, requiring four parameters. From these, we find 18 GRBs that present a break feature resembling a plateau. We conduct the first multiwavelength study of the Dainotti correlation between the luminosity L

a
and the rest-frame time of break T

a
* for those 18 GRBs, concluding that the correlation exists and resembles the corresponding correlation at X-ray and optical wavelengths after correction for evolutionary effects. We compare T

a
* for the radio sample with T

a
* values in X-ray and optical data, finding significantly later break times in the radio. We propose that this late break time and the compatibility in slope suggest either a long-lasting plateau or the passage of a spectral break in the radio band. We also correct the distribution of the isotropic energy E
iso versus the rest-frame burst duration T
*
90 for evolutionary effects and conclude that there is no significant difference between the T*90 distributions for the radio LCs with a break and for those without.
A Uniformly Selected, Southern-sky 6dF, Optical AGN Catalog
Authors: Chen Yan-Ping , Zaw Ingyin , Farrar Glennys R. , Elgamal Sana
Published: January 2022

We have constructed a catalog of active galactic nuclei (AGNs) with z < 0.13, based on optical spectroscopy, from the parent sample of galaxies in the Six-Degree Field (6dF) galaxy survey (Final Release of 6dFGS), a census of the Southern Hemisphere. This work is an extension of our all-sky AGN catalog in Zaw et al. (ZCF, hereafter). The ZCF is based on 43,533 galaxies with K
s ≤ 11.75 (z ≤ 0.09) in the Two Micron All-Sky Survey (2MASS) Redshift Survey (2MRS). The parent catalog of this work, the 6dF catalog, consists of 136,304 publicly available digital spectra for 125,071 galaxies with decl. ≤ 0° and K
s ≤ 12.65 (median z = 0.053). Our AGN catalog consists of 3109 broadline AGNs and 12,156 narrowline AGNs which satisfy the 2003 criteria, of which 3865 also satisfy the 2001 criteria. We also provide emission-line widths, fluxes, flux errors, and signal-to-noise ratios of all the galaxies in our spectroscopic sample, allowing users to customize the selection criteria. In addition, we provide the AGN likelihood for the rest of galaxies based on the availability and quality of their spectra. These likelihood values can be used for rigorous statistical analyses.
Acute Total Occlusion of the Left Circumflex Coronary Artery Presenting with Non-ST-segment Elevation Myocardial Infraction and Normal Electrocardiogram – A Case Report
Authors: Sihite Teddy Arnold , Hendrawansyah Sindy , Pranata Raymond
Published: January 2022

Introduction
In this case report, we report a patient with non-ST-segment elevation myocardial infarction (NSTEMI), presenting with recurrent chest pain typical of angina, a very high troponin I level despite normal electrocardiogram (ECG). On angiography, it turns out that the patient has acute total occlusion in the left circumflex artery (LCx).
Case Report
A 56 years-old woman presented to the emergency department with chief complaint of recurrent chest pain typical of angina 20 hours before admission. Vital signs were within normal limit. There were no murmur, additional heart sounds, and no rales or crackles. The ECG showed normal sinus rhythm, and there were no ST-T changes on serial examination. The first and second cardiac enzymes troponin I was high (> 10 mg/L). Chest X-ray examination showed cardiomegaly without signs of lung edema.  Patient was diagnosed with high risk NSTEMI, hypertensive heart disease, and diabetes mellitus. Coronary showed an acute total occlusion in the LCx, which is determined as the culprit lesion for the ongoing myocardial infarction. A drug-eluting stent was deployed at the culprit lesion and the coronary flow was TIMI Flow 3. There was non-significant stenosis at the mid-right coronary artery. The echocardiography showed reduced left ventricular systolic function (LVEF 50%) with hypokinetic inferior-septal and inferior-lateral segment base to apical. Post-procedural follow-up was uneventful.
Conclusion
One of the learning points is that ECG may fail to detect acute total occlusion and rise in troponin level, despite the absence of ST-T changes, warrant urgent invasive strategy.
Effect of Lactobacillus plantarum DAD-13 and Fructo-oligosaccharides on Short-Chain Fatty Acid Profile and Nutritional Status in Indonesian Stunting Children
Authors: Gunawan Delima , Juffrie Mohammad , Helmyati Siti , Rahayu Endang S.
Published: January 2022

BACKGROUND: Chronic gut inflammation is a generalized disturbance of small intestine structure and function is likely to play a large role in the incidence of stunting. It will be disturbances the absorption of nutrients, therefore, it can indirectly reduce on nutritional status.

AIM: The aim of this study is to examine the effect of Lactobacillus plantarum DAD-13 and fructooligosaccharide on short-chain fatty acid (SCFA) profile and nutritional status in Indonesian stunting children.

METHODS: The study design was used double-blind randomized placebo-controlled trial, 39 stunting children under five received daily oral supplementations of L. plantarum DAD-13 1 × 1010 cfu and fructooligosaccharide 700 mg (symbiotic group) or placebo group for 90 days. SCFA profile was analyzed using gas chromatography and nutritional status was assessed by WAZ, HAZ, and WHZ.

RESULTS: The result shows in symbiotic and control group, the mean age was 26 ± 8.34 and 29 ± 5.78, and the mean weight was 8.5 ± 0.94 kg and 9.0 ± 0.82 kg, while the mean height was 78.96 ± 5.4 cm and 80.9 ± 4.55 cm, respectively. Concentrations of acetate, propionate, and butyrate in the symbiotic group after consumption were 17.10 ± 2.97, 7.70 ± 2.05, and 7.47 ± 1.76 while in placebo group 12.44 ± 3.61, 5.20 ± 1.66, and 6.12 ± 1.16, respectively. There was a significant difference in the mean SCFA concentration between the symbiotic and placebo groups (p < 0.05), where the SCFA concentration in the symbiotic group was significantly higher than the placebo group. Nutritional status (WAZ, HAZ, and WHZ) was observed significantly in symbiotic group (p < 0.05), only on WHZ has cutoff point >-2SD after the intervention, while WAZ and HAZ <-2SD.

CONCLUSIONS: L. plantarum DAD-13 and fructooligosaccharide 90 days supplementation have increase acetate, butyrate, and propionate that are important fuels for intestinal epithelial cells that can play an important role in the maintenance of health.
Phylogenetic relationships in Coryphantha and implications on Pelecyphora and Escobaria (Cacteae, Cactoideae, Cactaceae)
Authors: Sánchez Daniel , Vázquez-Benítez Balbina , Vázquez-Sánchez Monserrat , Aquino David , Arias Salvador
Published: January 2022

The genus Coryphantha includes plants with globose to cylindrical stems bearing furrowed tubercles, flowers arising at the apex, and seeds with flattened testa cells. Coryphantha is the second richest genus in the tribe Cacteae. Nevertheless, the genus lacks a phylogenetic framework. The limits of Coryphantha with its sister genus Escobaria and the infrageneric classification of Coryphantha have not been evaluated in a phylogenetic study. In this study we analyzed five chloroplast regions (matK, rbcL, psbA-trnH, rpl16, and trnL-F) using Bayesian phylogenetic analysis. We included 44 species of Coryphantha and 43 additional species of the tribe Cacteae. Our results support the monophyly of Coryphantha by excluding C. macromeris. Escobaria + Pelecyphora + C. macromeris are corroborated as the sister group of Coryphantha. Within Coryphantha our phylogenetic analyses recovered two main clades containing seven subclades, and we propose to recognize those as two subgenera and seven sections, respectively. Also, a new delimitation of Pelecyphora including C. macromeris and all species previously included in Escobaria is proposed. To accommodate this new delimitation 25 new combinations are proposed. The seven subclades recovered within Coryphantha are morphologically and geographically congruent, and partially agree with the traditional classification of this genus.
A multi-objective lion swarm optimization based on multi-agent
Authors: Wu Zhongqiang , Xie Zongkui
Published: January 2022

This paper proposes a multi-objective lion swarm optimization based on multi-agent (MOMALSO) for solving the increasingly complex multi-objective optimization problem in engineering practice. First, the Multi-agent system is introduced into the lion swarm optimization (LSO) algorithm. The optimization mechanism of LSO and the information exchange between the agents are integrated to enhance the local search and global search ability of the algorithm, and the self-learning operation can accelerate the approximate Pareto front obtained by the algorithm near to real front. Besides, the external archive is introduced for extending the LSO into a multi-objective algorithm. Finally, the simulations compared with other three algorithms are performed, and the results show that MOMALSO has significant advantages in both convergence and coverage, which verifies the superiority and effectiveness of the algorithm in multi-objective optimization.
The doubling time analysis for modified infectious disease Richards model with applications to COVID-19 pandemic
Authors: Smirnova Alexandra ,   Department of Mathematics & Statistics, Georgia State University, 25 Park Place, Atlanta, GA 30303, USA, Pidgeon Brian , Chowell Gerardo , Zhao Yichuan ,   Department of Population Health Sciences, Georgia State University, 140 Decatur St SE, Atlanta, GA 30303, USA
Published: January 2022

In the absence of reliable information about transmission mechanisms for emerging infectious diseases, simple phenomenological models could provide a starting point to assess the potential outcomes of unfolding public health emergencies, particularly when the epidemiological characteristics of the disease are poorly understood or subject to substantial uncertainty. In this study, we employ the modified Richards model to analyze the growth of an epidemic in terms of 1) the number of times cumulative cases double until the epidemic peaks and 2) the rate at which the intervals between consecutive doubling times increase during the early ascending stage of the outbreak. Our theoretical analysis of doubling times is combined with rigorous numerical simulations and uncertainty quantification using synthetic and real data for COVID-19 pandemic. The doubling-time approach allows to employ early epidemic data to differentiate between the most dangerous threats, which double in size many times over the intervals that are nearly invariant, and the least transmissible diseases, which double in size only a few times with doubling periods rapidly growing.
On the Factor Structure of Bond Returns
Authors: Crump Richard K. , Gospodinov Nikolay
Published: January 2022

We demonstrate that characterizing the minimal dimension of the term structure of interest rates is more challenging than currently appreciated. The highly structured polynomial patterns of the factor loadings, which are widely reported and discussed in the literature, reflect local correlations of smooth curves across maturities. We derive analytical expressions for the loadings of cross‐sectionally dependent processes that tend to favor a much lower dimension than the true dimension of the underlying factor space. Numerical examples illustrate the significant economic costs of erroneously committing to a parsimoniously parameterized factor space that is informed by standard metrics of goodness‐of‐fit. Our results apply to other assets with a finite maturity structure.
Patterns of Competitive Interaction
Authors: Armstrong Mark , Vickers John
Published: January 2022

We explore patterns of price competition in an oligopoly where consumers vary in the set of firms they consider for their purchase and buy from the lowest‐priced firm they consider. We study a pattern of consideration, termed “symmetric interactions,” that generalizes models used in existing work (duopoly, symmetric firms, and firms with independent reach). Within this class, equilibrium profits are proportional to a firm's reach, firms with a larger reach set higher average prices, and a reduction in the number of firms (either by exit or by merger) harms consumers. However, increased competition (either by entry or by increased consumer awareness) does not always benefit consumers. We go on to study patterns of consideration with asymmetric interactions. In situations with disjoint reach and with nested reach, we find equilibria in which price competition is “duopolistic”: only two firms compete within each price range. We characterize the contrasting equilibrium patterns of price competition for all patterns of consideration in the three‐firm case.
Testing identifying assumptions in fuzzy regression discontinuity designs
Authors: Arai Yoichi , Hsu Yu-Chin , Kitagawa Toru , Mourifié Ismael , Wan Yuanyuan
Published: January 2022

We propose a new specification test for assessing the validity of fuzzy regression discontinuity designs (FRD‐validity). We derive a new set of testable implications, characterized by a set of inequality restrictions on the joint distribution of observed outcomes and treatment status at the cut‐off. We show that this new characterization exploits all of the information in the data that is useful for detecting violations of FRD‐validity. Our approach differs from and complements existing approaches that test continuity of the distributions of running variables and baseline covariates at the cut‐off in that we focus on the distribution of the observed outcome and treatment status. We show that the proposed test has appealing statistical properties. It controls size in a large sample setting uniformly over a large class of data generating processes, is consistent against all fixed alternatives, and has non‐trivial power against some local alternatives. We apply our test to evaluate the validity of two FRD designs. The test does not reject FRD‐validity in the class size design studied by Angrist and Lavy (1999) but rejects it in the insurance subsidy design for poor households in Colombia studied by Miller, Pinto, and Vera‐Hernández (2013) for some outcome variables. Existing density continuity tests suggest the opposite in each of the two cases.
Information theoretic approach to high‐dimensional multiplicative models: Stochastic discount factor and treatment effect
Authors: Qiu Chen , Otsu Taisuke
Published: January 2022

This paper is concerned with estimation of functionals of a latent weight function that satisfies possibly high‐dimensional multiplicative moment conditions. Main examples are functionals of stochastic discount factors in asset pricing, missing data problems, and treatment effects. We propose to estimate the latent weight function by an information theoretic approach combined with theℓ1‐penalization technique to deal with high‐dimensional moment conditions under sparsity. We study asymptotic properties of the proposed method and illustrate it by a theoretical example on treatment effect analysis and empirical example on estimation of stochastic discount factors.
A Structural Equation Modelling of Governing Factors Influencing Patient Acceptance of Mobile Health in Saudi Arabia
Authors: Alkhalifah Tamim
Published: January 2022

There are obstacles that are delaying the implementation of mobile health (mHealth) in Saudi Arabia. For instance, mobile health cannot be effectively implemented if patients’ behavioural intentions are not taken into account, as patients’ attitudes and persistence are important for the successful introduction of any IT application. Indeed, the topic of mobile health acceptance, in the particular case of Saudi Arabia, has not been adequately investigated, despite the availability of some general research on the acceptance of technology. Therefore, the present study adopted the unified theory of acceptance and use of technology (UTAUT) model with the aim of identifying the determinants of mobile health application acceptance. The UTAUT model identified a selection of factors that influenced the uptake of mobile health services. Performance expectancy, effort expectancy, facilitating conditions, system quality and trust in the ICT system were all positively influential. However, social factors did not appear to affect the behavioural intention to use mobile health.
Personalised Display Advertising and Online Purchase Intentions
Authors: Odoom Priscilla Teika
Published: January 2022

Personalized ads are increasingly used by marketers to promote product and service brands, however, the effect of ad personalization on consumer perceptions and online purchase intention has received limited research attention particularly, in different media usage situations. To address this gap, data was collected in four sub-Saharan African countries through an online survey to test the hypothesized model using structural equation modeling. The findings indicate that perceived ad personalization influences online purchase intention and this relationship is partially mediated by perceived relevance and fully mediated by perceived intrusiveness. No effects were found for privacy concern. Notably, internet use motivation moderated the relationships between the predictor and the outcomes. Specifically, the effect of ad personalization on perceived intrusiveness was only significant among paratelic users, its effect on purchase intention was also stronger among paratelic users, and its effect on perceived relevance was more pronounced among telic users.
Intention of Personal Information Disclosure in Mobile Payment Apps
Authors: Le Mai Thi Thu , Pham Hien Thu , Tran Minh Thi Nguyet , Le Thao Phuong
Published: January 2022

This paper employs the regulatory focus and risk-taking perspectives to integrate constructs related to the intention to disclose personal information in mobile payment apps among young people in such an emerging country like Vietnam. Data were collected from a survey among young Vietnamese people and analyzed with statistical software of SPSS and AMOS. Findings reveal that promotion regulatory focus leads to risk propensity which will be positively correlated to intention to disclose personal information in mobile payment apps among young people. In contrast prevention regulatory focus is correlated to risk perception which will be negatively related to intention to disclose personal information in mobile payment apps. Furthermore, the positive moderating role of perceived trust in the relationship between risk propensity and intention to disclose personal information in mobile payment apps is confirmed while perceived trust has been found to negatively moderate the impact of risk perception on intention to disclose personal information in mobile payment apps.
Circular Bio-Economy Voyage
Authors: Rawat Prigya , Singh Vinay
Published: January 2022

The circular bio-economy journey is determined exceedingly from the industrial ecological lens, with brief intake from the management field studies. The present research embarks to contemplate the circular bio-economy applying managerial approach by splitting the complicated abstraction into a more straightforward structure using VOS Viewer software. Nine determining elements backed by organizational vantage point are extracted - industrial symbiosis, sustainable transitions, multilevel perspective, bio-economic regions, governance, innovations, challenges, sustainability and regional value chains. All nine elements retrieved from the literature are ranked based on expert opinion. Eventually, variable CER6 (challenges) ranked first in the order, followed by CER1 (sustainable transitions); the least relevant variable ranked by the experts is CER9 (industrial symbiosis). For better validation, the TISM technique is used. These pressing issues demand immediate attention from practitioners, entrepreneurs, policy-makers, academicians, and management scholars.
Sustainable Supply Chain Management Barriers in Shrimp Food Supply Chain
Authors: Satapathy Suchismita
Published: January 2022

Sustainable supply chain management in the incorporation of the environmentally, socially and financially suitable practices into the whole lifecycle of the supply chain, from starting to the end of the supply chain. If sustainability is implemented in a supply chain helps the enterprise and individuals in many ways like improving their continuity in supply, reduction in impact to the environment, increase their businesses and particularly in the food enterprises it also improves the food safety. The main aim was to study and analyse the barriers which come under the way of implementation of sustainable supply chain management in Indian Shrimp industry. The prioritisation of the barrier was done by grey relational analysis.
Using a Translanguaging Approach to Capture Emergent Bilingual Creativity
Authors: Yang Shizhou
Published: January 2022

The translanguaging theory encourages language teachers to view their learners’ linguistic backgrounds as a resource for creative expression. This article proposes an autoethnographically oriented application of the translanguging approach to studying emergent bilingual creativity in online communication. It includes three steps—storytelling, cultural interpretation, and online research—thus linking personal experiences of bilingual creativity with communal practice. To illustrate the approach’s usefulness, the author applies it to his own observed cases of bilingual creativity in Chinese-English bilingual communication. Pedagogical implications for teaching language, World Englishes, and creative writing courses are provided.
Towards Convergence of AI and IoT for Smart Policing
Authors: Huang Chen-Hao , Chou Tzu-Chuan , Wu Sheng-Hsiung
Published: January 2022

With the fast growth of IoT and AI techniques, AIoT’s potential in creating and capturing business value is being increasingly acknowledged. AIoT is the practice of combining AI with IoT-based hardware to proactively predict what might happen and what action needs to be taken. However, research on this issue has been limited and what the key mechanisms for designing AIoT based context-aware services are in the real field is still underexplored. In this article, we bridge this gap by studying a case study of AIoT based context-aware system in law enforcement in terms of information system artifacts to extend our understating of the AIoT based system’s mechanisms for business applications. Our case study reveals a conceptual model that can ensure AIoT empowered context-aware services in a police field unit. The implications, limitations, and future applications of the development of AIoT empowered context-aware services are discussed.
Mechanical Analysis of Laminated Structures Consisting of Denim Fabric and Recycled HDPE / LDPE Bottle Caps
Authors: Yalçın Eniş Ipek , Sezgin Hande
Published: January 2022

Industrialization and the increase in population in the world have led to a great increase in the amount of solid waste. Plastic and textile wastes have an important share among the solid wastes, which include many different waste groups. While the increase in disposable products increases the amount of plastic waste, the understanding of fast fashion is among the most important reasons for the increase in textile waste. In this study, cotton based woven textile wastes (2nd quality denim fabric) are laminated with plastic packaging wastes (high density polyethylene (HDPE) and low density polyethylene (LDPE) water bottle caps) in various sequences and thickness, areal density and fiber weight ratio values of these structures are examined. In addition, the impact properties of the produced laminated composite structures are analyzed via drop-weight impact testing machine. The results show that the increase in the number of fabric layers contributes positively to the energy absorption rate thus the samples including two layers of fabrics and one layer of either LDPE or HDPE plastic sheet have the highest maximum loads and absorbed energy values. In addition, it is also seen that HDPE lamination results in higher absorbed energy values compared to LDPE lamination.
Research on the End Effect of Cylindrical Parts
Authors: Wang Chao Yu , Wang Hong Bo , Yu Bo , Ji Xin Yang , Li Ming Zhe , Fu Wen Zhi
Published: January 2022

Through the forming of large and thick sheet metal cylindrical parts, it was found that symmetrical abnormal arching defects appeared at both ends of the first and tail ends in the length direction. In response to this phenomenon, the finite element simulation verification and comparison of the two processes of multi-point mold forming and integral mold forming are carried out. The analysis results show that this kind of end effect exists in both the multi-point mold forming and the overall mold forming process, and the overall mold forming effect is better. The multi-point mold has a small springback in the length direction, which is versatile and compatible.
High Throughput Calculation and Screening of High Strength and High Conductivity Cu-Cr-Sn Copper Alloy
Authors: Tang Jin Jun , Liang Cui , Xu Chen Guang
Published: January 2022

In this paper, based on the first principles, the exchange correlation functional (GGA) and modified functional (PBE) are used for the calculation of Cu-Cr-Sn high strength and high conductivity copper alloy. The cloud high-throughput cloud computing and screening platform such as Matcloud and cluster expansion method are mainly used. Starting from the most basic components of micro atoms, electrons, ions and energy bands, the high-throughput crystal structure modeling and screening optimization algorithm are adopted, The electronic structure, electromigration and diffusivity of the matrix and the second phase of the material were studied. The theoretical criteria for the collaborative optimization and control of the key performance parameters of the matrix and the characteristic microstructure were established. The characteristic microstructure and material component sequences with excellent mechanical, electrical and thermodynamic properties were predicted and screened.
Study of the Corrosion Inhibition Reaction of Admixed Plant Distillates on Mild Steel
Authors: Loto Roland Tolulope , Leramo Richard , Olowoyo Tobilola , Igwe Kelechi
Published: January 2022

The corrosion inhibition reaction of plant distillates and their synergistic combination effect was studied. Atlas cedarwood distillate (ACW), and admixture of sage and Jojoba distillates (SJA), and admixture of jojoba and lavender distillates (JLD) were evaluated at minimal concentrations to for their corrosion inhibition effect on mild steel in 1 M H2SO4 solution. Results showed ACW reacted poorly at 1% and 2% inhibitor concentration. However, from 3% - 6% ACW concentration the final corrosion rate of 94.73%, 94.77% and 95.61% was attained at 240 h signifying effective inhibition performance. SJA inhibitor compound exhibited optimal performance at all concentrations (1% - 6% SJA) with maximum inhibition value of 98.44% at 5% SJA concentration. JLD exhibited optimal performance at all concentrations studied after 2% JLD with maximum inhibition value of 91.07% at 3% JLD concentration and 240 h exposure time. The mean values for ACW and JLD inhibition efficiency appreciated with increase in inhibitor concentration while the value for SJA compound was generally constant. Results shows the extent of variation from mean values (standard deviation) for ACW and JLD was significantly high compared to the values obtained for SJA compound where the deviation from mean value is below 2. The Margin of error values for ACW and JLD compound shows that 65% and 60% of inhibition efficiency data have values above 70% inhibition efficiency compared to SJA where 100% of its inhibition efficiency data have values above 70% inhibition at +12.07%, +13.58% and +0% and +13.58%. Statistical analysis ANOVA only inhibitor concentration of the compounds significantly influenced their inhibition performance with values of 66.61%, 70.29% and 93.07% (ACW, SJA and JLD compound) compared to exposure time which had no influence. However, confirmation comparison of the mean square ratio of the compounds with the theoretical statistical tables shows the inhibitor concentration for JLD only is statistically relevant.
Effect of Elevated Temperature on the Compressive Strength of Waste Tile Aggregate Concrete
Authors: Wu Chung Hao , Chi Jen Hao , Chi Mao Chieh , Huang Chun Kai
Published: January 2022

The research aims to investigate the effect of elevated temperature on the compressive strength of concrete containing waste tile aggregate. Two water-to-cement ratios (w/c = 0.4 and 0.6) and three replacement ratios of waste tile aggregate (0%, 50% and 100%) were selected for producing concrete specimens. Experiment results showed that the slump of concrete were increased with the increase of the replacement ratio of waste tile aggregate. The compressive strength of concrete decreased with the increase of waste tile aggregate. The concrete with higher w/c of 0.6 can present equivalent compressive strength for that of the replacement ratio of waste tile aggregate under 50%; on the contrary, the concrete with lower w/c of 0.4 can have higher compressive strength for the replacement ratio increased to 100%. In addition, when the subjected temperature exceeded 440°C and raised to 800°C, the compressive strength of concrete decayed seriously and the residual strengths was almost the same at 800°C. Consequently, the fire resistance of waste tile aggregate concrete may be comparable to that of natural aggregate concrete.
Enhanced Performance of the Non-Polar Ultraviolet Light-Emitting Diodes with Lattice-Matched Quaternary Quantum Barriers
Authors: Dai Qian , Zhang Xiong , Wu Zi Li , Zeng Xiang Hua
Published: January 2022

The performance of non-polar AlGaN-based ultraviolet light-emitting diode (LED) with completely lattice-matched AlInGaN quantum barriers along the [1-100] m-direction were firstly proposed and intensively studied. The simulation results indicated that the internal quantum efficiency (IQE) of the non-polar AlGaN-based LED could be enhanced by 9.7% at an injection current of 350 mA with the introduction of AlInGaN barriers. Compared with the nonpolar AlGaN-based LED with conventional AlGaN quantum barriers, not only the Shockley–Read–Hall recombination rate for the nonpolar AlGaN-based LED with quaternary barriers was remarkably reduced, but also the radiative recombination rate was significantly improved. The enhanced performance for the nonpolar AlGaN-based LED with AlInGaN barriers could be interpreted as the result that the density of dislocations in active region was decreased due to the reduced in-plane strain in the AlGaN/AlInGaN MQWs.
Influence of Plasmonic Gold Nanoparticles on the Optical Properties of Oxide Glasses Doped with Rare-Earth Ions
Authors: Shakhgildyan Georgiy
Published: January 2022

We report on the thermally-induced precipitation of gold plasmonic nanoparticles in phosphate and silicate glasses, doped with Eu3+ and Er3+ ions. We studied the structure and optical properties of glasses under the heat treatment below and above glass transition temperature. The heat treatment of the glass at temperatures above transition is shown to facilitate the formation of plasmonic gold nanoparticles and decrease near-infrared luminescence intensity of the ions. The formation of pre-plasmonic gold nanoparticles under the low-temperature heat-treatment leads to the increase of luminescence intensity through the energy transfer process. We showed that nanophase separation in silicate glasses allows precise tuning of localized surface plasmon resonance spectral position of gold nanoparticles and paves the way for the development of new glass-based materials for photonics applications.
« Une texture imaginaire ». Les phrases initiales et la cohérence dans l’écriture d’Andrzej Stasiuk et dans sa traduction française
Authors: Mitura Magdalena
Published: January 2022

“Imaginary texture”: opening sentences and coherence in Andrzej Stasiuk’s prose and its French translations The basic principle ensuring the cohesion and coherence of a text is the phenomenon of grammatical and semantic linkage of each sentence with the prior context. Evidently, this rule does not apply to the opening sentences of a work or, to a lesser extent, of its chapter. The subject of the article is the analysis of such opening sentences in selected works by Andrzej Stasiuk breaking out of this exception. They create the impression of false consistency with a prior, non-existent context by using a connector that opens them. The solutions applied in French translations reveal different tendencies for the construction of coherent relations. What is more, they indicate the complex factors underlying the translators’ decisions and cause modifications in the stylistic layer of the target text.
Celle qui ne berce pas : le concept bachelardien de la maternité des éléments révisé par Michel Butor
Authors: Kotowska-Miziniak Joanna
Published: January 2022

The one who does not cradle: Gaston Bachelard’s concept of maternity of the elements revisited by Michel Butor

Michel Butor’s experimental spirit leads him to challenge the optimistic vision of water and earth created by the 20th century philosopher Gaston Bachelard. In his New Novel published in 1956, L’Emploi du temps, Butor becomes particularly virulent in the face of an idea postulating the maternal aspect of two elements. He methodically questions all fundamental principles of Bachelard’s vision in order to explore the darker and more violent side of aquatic and telluric forces of nature.
Relaciones semántico-sintácticas en Entre el léxico y la sintaxis: las fases de los eventos de María Martínez-Atienza de Dios
Authors: Lisowska Monika
Published: January 2022

Semantic-syntactic relations in Entre el léxico y la sintaxis: las fases de los eventos by María Martínez-Atienza de Dios The article discusses the book Entre el léxico y la sintaxis: las fases de los eventos by María Martínez-Atienza de Dios. This work, focusing on phases of verbal events, studies the semantic and syntax of some Spanish verb periphrases and the adverbial phrase de sopetón. Special attention is given to the aspectual class of verbal events called states, for which a new complex structure is proposed.
De conexão, prevenção e reunião de processos: multiplicidade de fases de operações como critério de fixação de competência
Authors: Pacelli de Oliveira Eugênio , Oliveira de Carvalho Matheus
Published: January 2022

O texto aborda, essencialmente, dois pontos de tensão referentes à temática da conexão, ambos a ver com a distribuição da ação penal a determinado juízo em detrimento de outro investido na mesma competência territorial, sob a declarada finalidade de se evitar decisões judiciais contraditórias, invariavelmente utilizada para justificar, de todo modo, reuniões de processos. A primeira inquietação levantada questiona, em grande parte dos casos, a necessidade de afastamento prévio que se faz de um ou mais juízes – igualmente competentes – que poderiam também e legitimamente avaliar de sua competência, caso a ação fosse distribuída aleatoriamente pelos critérios do art. 75, CPP. Chama-se atenção especialmente para os casos, cada vez mais comuns, em que uma mesma operação policial se desdobre em inúmeras fases, o que se prestaria a justificar a permanência, até a última delas, da competência do juízo vinculado ao início da operação, sobretudo a partir de eventuais identidades de fontes probatórias, resultantes apenas de casualidade, com as quais se busca estabelecer vínculos entre fatos que, no mais das vezes, não atingem o nível da conexidade exigido pela lei processual. Em um segundo momento, o texto busca a desconstrução da crença comum de que a conexão, ordinariamente, viria acompanhada do risco de decisões conflitantes. A partir do estudo pormenorizado de cada uma das hipóteses legais de conexão, chega-se à definição daquele que seria o ponto essencial a que todo risco de decisões conflitantes (na conexão) poderia ser reconduzido.
Towards a Democratic Division of Labour in Europe?
Authors: Van Dongen Walter
Published: January 2022

This book analyses male violence against women and children, and the mechanisms society develops to push it out of sight.
Healthcare in the UK
Authors: Greener Ian
Published: January 2022

This important book addresses a growing international interest in 'age-friendly' communities, examining the conflicting stereotypes of rural communities as either idyllic and supportive or isolated and bereft of services.
Child well-being child poverty and child policy
Authors: Rowlands Robert O.
Published: January 2022

This revised edition includes a new foreword and an updated introduction and conclusion providing insights into the key issues. The book's contributors are all leading experts in their fields, and have studied the extent of child poverty, its consequences for children and the effectiveness of policies of prevention.
Social Policy in China
Authors: Chan Chak Kwan , Ngok King Lun , Phillips David
Published: January 2022

Community safety emerged as a new approach to tackling and preventing local crime and disorder in the late 1980s and was adopted into mainstream policy by New Labour. This book provides the first sustained critical and theoretically informed analysis of the community safety agenda by leading authorities in the field.
STATISTICAL ANXIETY AND METACOGNITIVE AWARENESS LEVELS OF GRADUATE STUDENTS STUDYING IN MATHEMATICS EDUCATION PROGRAM
Authors: Altun Murat , Yılmaz Gül Kaleli , Demir Barış , Çelik Hülya Sert
Published: January 2022

Graduate students are faced with some difficulties in determining statistical methods to be used in their assignments and researches and this leads to anxiety in them. In this study, it was aimed to examine the relationships between statistical anxiety and metacognitive awareness levels of graduate students studying in the field of mathematics education and to compare these levels in terms of some variables. The research study group consists of 101 students studying at the master's and doctorate levels in the department of mathematics education and participated in the research voluntarily. As a data collection tool in the research, Statistical Anxiety Scale (SAS) and Metacognitive Awareness Scale (MCAS) were used. In the analysis of the data, descriptive statistics, t-test, ANOVA and Correlation Coefficient were used. According to the research results, it was determined that there is a negative and moderately significant relationship between statistical anxiety and metacognitive awareness levels of graduate students studying in the field of mathematics education. As a result of the analyzes, it was observed that the statistical anxiety and metacognitive awareness of the students were high, the statistical anxiety and metacognitive awareness levels differed statistically according to the variables of graduate education level and stage of graduate education, but did not differ significantly according to the variables of gender and taking statistics course. 

 

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