bluuebunny/crossref_metadata_2025 huggingface dataset:
Return to employment for working-aged adults after burn injury: a scoping review protocol
Authors: Katsu Akane , Tyack Zephanie , Mackey Martin , Elliott James M , Mackenzie Lynette
Published: January 2021

Introduction

Cutaneous burns can have a catastrophic effect on people’s lives and may restrict opportunities for employment due to physical impairment and psychosocial deficits. Failure or delay in return to work can result in loss of income and support for the family unit. It can also negatively affect life role and identity and present difficulties with future opportunities. Current literature indicates multiple discrete influences on return to work as a result of burn injury but an understanding of how working-aged adults resume employment after burn injury is lacking. This scoping review will provide a comprehensive overview of the current literature by mapping and consolidating knowledge in this area of burn recovery and thus provide an informative basis for developing return-to-work programmes for survivors of burn injury.

Methods and analysis

This scoping review protocol will follow the Arksey and O’Malley’s (2005) methodological framework. A comprehensive search strategy has been developed with subject expert librarians. These databases were used: OvidSP: Medline, Embase, PsycINFO, PubMed and Cochrane Central Register of Controlled Trials and EBSCOhost: CINAHL and Scopus. Reference lists of selected full text will be hand searched for additional literature. To enhance consistency and rigour, all reviewers will undertake a calibration exercise before paired reviewers independently screen all records using Rayyan. Full-text articles meeting the study inclusion criteria will be retrieved and examined. Extracted data will be analysed using the International Classification of Functioning, Disability and Health.

Ethics and dissemination

Ethics approval is generally not required for scoping reviews. Findings of this scoping review will be reported in a peer-reviewed journal and presented at conferences.
Prevalence of chronic pain after spinal cord injury: a systematic review and meta-analysis
Authors: Hunt Christine , Moman Rajat , Peterson Ashley , Wilson Rachel , Covington Stephen , Mustafa Rafid , Murad M Hassan , Hooten W Michael
Published: January 2021

Background

The reported prevalence of chronic pain after spinal cord injury (SCI) varies widely due, in part, to differences in the taxonomy of chronic pain. A widely used classification system is available to describe subcategories of chronic pain in SCI, but the prevalence of chronic pain in SCI based on this system is unknown.

Objective

The primary objective of this systematic review and meta-analysis is to determine the prevalence of chronic pain after SCI based on the International Spinal Cord Injury Pain (ISCIP) classification system.

Evidence review

A comprehensive search of databases from January 1980 to August 2019 was conducted. The risk of bias was assessed using a modified tool developed for uncontrolled studies. The Grading of Recommendations, Assessment, Development and Evaluation approach was used to assess certainty in prevalence estimates.

Findings

A total of 1305 records were screened, and 37 studies met inclusion criteria. The pooled prevalence of overall chronic pain was 68% (95% CI 63% to 73%). The pooled prevalence of neuropathic pain in 13 studies was 58% (95% CI 49% to 68%); the pooled prevalence of musculoskeletal pain in 11 studies was 56% (95% CI 41% to 70%); the pooled prevalence of visceral pain in 8 studies was 20% (95% CI 11% to 29%) and the pooled prevalence of nociceptive pain in 2 studies was 45% (95% CI 13% to 78%). Meta-regression of risk of bias (p=0.20), traumatic versus non-traumatic etiology of injury (p=0.59), and studies where pain was a primary outcome (p=0.32) demonstrated that these factors were not significant moderators of heterogeneity. Certainty in prevalence estimates was judged to be low due to unexplained heterogeneity.

Conclusion

This systematic review and meta-analysis extends the findings of previous studies by reporting the prevalence of chronic pain after SCI based on the ISCIP classification system, thereby reducing clinical heterogeneity in the reporting of pain prevalence related to SCI.
Can exotic tree plantations preserve the bird community of an endangered native forest in the Argentine Pampas?
Authors: Lacoretz Mariela V. , Depalma Daniela M. , Torrella Sebastián A. , Zilli Cecilia , Ferretti Valentina , Fernández Gustavo J.
Published: January 2021

Worldwide, the areas covered by native forests are declining while those of tree plantations are increasing. This has raised the question of whether tree plantations are able to preserve native forest species. In Argentina, the main native forests of the Pampas region, called talares, are endangered and their disappearance is imminent. Although exotic tree plantations are increasing in this region, their role in maintaining native bird diversity has not been studied in Argentine Pampas. We compared the bird community attributes and vegetation structure of talares native forests with those of tree plantations. Compared with talares native forests, plantations exhibited markedly lower bird richness (up to 80% lower), and all forest-dependent bird species were absent in plantations. Talares and plantations differed also in some aspects of vegetation structure, which usually are key determinants of bird abundance. Given the extreme importance of talares for forest birds, this bird community will be deeply affected if talares native forests continue to decline, as nearby plantations do not offer suitable habitat. To maintain the bird diversity of talares, and probably the diversity of other unstudied taxa related to them, we recommend management actions that should be applied urgently in these endangered forests of the Argentine Pampas.
Fuzzy Clustering Ensemble Considering Cluster Dependability
Authors: Chen Zhong , Bagherinia Ali , Minaei-Bidgoli Behrooz , Parvin Hamid , Pho Kim-Hung
Published: January 2021

Clustering ensemble has been progressively popular in the ongoing years by combining several base clustering methods into a most likely better and increasingly robust one. Nonetheless, fuzzy clustering dependability (durability) has been unnoticed within the majority of the proposed clustering ensemble approach. This makes them weak against low-quality fuzzy base clusters. In spite of a few endeavors made to the clustering methods, it appears that they consider each base-clustering separately without considering its local diversity. In this paper, to compensate for the mentioned weakness a new fuzzy clustering ensemble approach has been proposed using a weighting strategy at fuzzy cluster level. Indeed, each fuzzy cluster has a contribution weight computed based on its reliability (dependability/durability). After computing fuzzy cluster dependability (reliability/durability), dependability based fuzzy cluster-wise weighted matrix (DFCWWM) is computed. As a final point, the final clustering is obtained by applying the FCM traditional clustering algorithm over DFCWWM. The time complexity of the proposed approach is linear in terms of the number of data-points. The proposed approach has been assessed on 15 various standard datasets. The experimental evaluation has indicated that the proposed method has better performance than the state-of-the-art methods.
Killing Stubborn Mutants with Symbolic Execution
Authors: Chekam Thierry Titcheu , Papadakis Mike , Cordy Maxime , Traon Yves Le
Published: January 2021

We introduce
SEMu
, a Dynamic Symbolic Execution technique that generates test inputs capable of killing stubborn mutants (killable mutants that remain undetected after a reasonable amount of testing).
SEMu
aims at mutant propagation (triggering erroneous states to the program output) by incrementally searching for divergent program behaviors between the original and the mutant versions. We model the mutant killing problem as a symbolic execution search within a specific area in the programs’ symbolic tree. In this framework, the search area is defined and controlled by parameters that allow scalable and cost-effective mutant killing. We integrate
SEMu
in KLEE and experimented with Coreutils (a benchmark frequently used in symbolic execution studies). Our results show that our modeling plays an important role in mutant killing. Perhaps more importantly, our results also show that, within a two-hour time limit,
SEMu
kills 37% of the stubborn mutants, where KLEE kills none and where the mutant infection strategy (strategy suggested by previous research) kills 17%.
Optimal Pricing for MHR and λ-regular Distributions
Authors: Giannakopoulos Yiannis , Poças Diogo , Zhu Keyu
Published: January 2021

We study the performance of anonymous posted-price selling mechanisms for a standard Bayesian auction setting, where
n
bidders have i.i.d. valuations for a single item. We show that for the natural class of Monotone Hazard Rate (MHR) distributions, offering the same, take-it-or-leave-it price to all bidders can achieve an (asymptotically) optimal revenue. In particular, the approximation ratio is shown to be 1+
O
(ln ln
n
/ ln
n
), matched by a tight lower bound for the case of exponential distributions. This improves upon the previously best-known upper bound of
e
/(
e
−1)≈ 1.58 for the slightly more general class of regular distributions. In the worst case (over
n
), we still show a global upper bound of 1.35. We give a simple, closed-form description of our prices, which, interestingly enough, relies only on minimal knowledge of the prior distribution, namely, just the expectation of its second-highest order statistic.

Furthermore, we extend our techniques to handle the more general class of λ-regular distributions that interpolate between MHR (λ =0) and regular (λ =1). Our anonymous pricing rule now results in an asymptotic approximation ratio that ranges smoothly, with respect to λ, from 1 (MHR distributions) to
e
/(
e
−1) (regular distributions). Finally, we explicitly give a class of continuous distributions that provide matching lower bounds, for every λ.
Sulphur Doped Graphitic Carbon Nitride as a Dual Biosensing Platform for the Detection of Cancer Biomarker CA15–3
Authors: Sakthivel Arunkumar , Chandrasekaran Anitha , Sadasivam Mohanraj , Manickam Pandiaraj , Alwarappan Subbiah
Published: January 2021

Herein, we report a dual biosensing platform operating viz., electrochemical and fluorescence mode for the cancer biomarker, CA15–3 detection. A one-step strategy was employed to synthesize sulphur doped graphitic carbon nitride nanosheets (S-g-C3N4). The presence of heteroatom (sulphur) in the molecular structure improved the optoelectronic properties and the surface functional group (–NH2) facilitated the covalent binding of antibodies and improved the selectivity during the analysis. The proposed biosensing platform was able to quantify very low concentration of the cancer biomarker, CA15–3 (2.9 U mL−1) in human serum samples and thereby evidenced the usefulness of this platform for clinical analysis and early disease diagnosis.
Study on Mechanical Properties of PET Fiber-Reinforced Coal Gangue Fine Aggregate Concrete
Authors: Huang Yanlin , Zhou An
Published: January 2021

In recent years, with the rapid development of the construction industry, the demand for natural river sand has become increasingly prominent. Development of alternatives to river sand has become an interesting direction for concrete research. In this paper, coal gangue was proposed to replace part of the river sand to produce coal gangue fine aggregate concrete, while waste polyethene terephthalate (PET) bottles were used as raw materials to make PET fibers to improve the mechanical properties of coal gangue fine aggregate concrete. There were two parts of the test conducted. In the first part, the compressive strength of the gangue fine aggregate concrete cube, splitting tensile strength, axial compressive strength, and static elastic modulus were studied when the substitution rate of coal gangue increased from 0% to 50%. Referring to the equation of the full stress-strain curve of plain concrete, the stress-strain constitutive equation of coal gangue fine aggregate concrete was analyzed and studied. By comparing with plain concrete, it was found that the coal gangue concrete with a replacement rate of 50% had higher compressive strength and tensile strength, but its brittleness was significantly greater than that of plain concrete in the later stage. In the second part, by studying the effect of different PET fiber content on the mechanical properties of coal gangue fine aggregate concrete with a replacement rate of 50%, it was found that when the addition of PET fiber was 0.1% and 0.3%, not only were compressive strength, splitting tensile strength, static elastic modulus, and flexural strength of the gangue fine aggregate concrete effectively improved but also the brittleness of concrete can be significantly reduced. The study found that after adding 0.3% PET fiber, the coal gangue fine aggregate concrete with a replacement rate of 50% has better mechanical properties and less brittleness.
A Dynamic Cavity Expansion Model for Rigid Projectile Penetration into Concrete considering the Compressibility and Nonlinear Constitutive Relations
Authors: Gao Fei , Wang Zhen , Wen Zhu , Ji Yuguo
Published: January 2021

The P-α equation of state (EOS) and a nonlinear yield criterion are utilized to characterize the dynamic constitutive behavior of concrete targets subjected to projectile normal penetration. A dynamic cavity expansion model considering the compressibility and nonlinear constitutive relations for concrete material is developed. Then, a theoretical model to calculate the depth of penetration (DOP) for rigid projectile is established. Furthermore, the proposed model is validated based on the available test data as well as the calculation results by the linear compressible EOS and linear yield criterion. This study shows that the proposed model derived using the P-α EOS and nonlinear yield criterion can effectively reflect the plastic mechanical properties of concrete and is also suitable for predicting the DOP of concrete targets. In addition, the influence law of concrete constitutive parameters such as the cohesion strength, shear strength, internal friction coefficient, and elastic limit pressure on the DOP is revealed.
Convergence of Some Iterative Algorithms for System of Generalized Set-Valued Variational Inequalities
Authors: Akram M. , Khan Aysha , Dilshad M.
Published: January 2021

In this article, we consider and study a system of generalized set-valued variational inequalities involving relaxed cocoercive mappings in Hilbert spaces. Using the projection method and Banach contraction principle, we prove the existence of a solution for the considered problem. Further, we propose an iterative algorithm and discuss its convergence. Moreover, we establish equivalence between the system of variational inequalities and altering points problem. Some parallel iterative algorithms are proposed, and the strong convergence of the sequences generated by these iterative algorithms is discussed. Finally, a numerical example is constructed to illustrate the convergence analysis of the proposed parallel iterative algorithms.
A Procarcinogenic Colon Microbe Promotes Breast Tumorigenesis and Metastatic Progression and Concomitantly Activates Notch and β-Catenin Axes
Authors: Parida Sheetal , Wu Shaoguang , Siddharth Sumit , Wang Guannan , Muniraj Nethaji , Nagalingam Arumugam , Hum Christina , Mistriotis Panagiotis , Hao Haiping , Talbot C. Conover , Konstantopoulos Konstantinos , Gabrielson Kathleen L. , Sears Cynthia L. , Sharma Dipali
Published: January 2021

The existence of distinct breast microbiota has been recently established, but their biological impact in breast cancer remains elusive. Focusing on the shift in microbial community composition in diseased breast compared with normal breast, we identified the presence of Bacteroides fragilis in cancerous breast. Mammary gland as well as gut colonization with enterotoxigenic Bacteroides fragilis (ETBF), which secretes B. fragilis toxin (BFT), rapidly induces epithelial hyperplasia in the mammary gland. Breast cancer cells exposed to BFT exhibit “BFT memory” from the initial exposure. Intriguingly, gut or breast duct colonization with ETBF strongly induces growth and metastatic progression of tumor cells implanted in mammary ducts, in contrast to nontoxigenic Bacteroides fragilis. This work sheds light on the oncogenic impact of a procarcinogenic colon bacterium ETBF on breast cancer progression, implicates the β-catenin and Notch1 axis as its functional mediators, and proposes the concept of “BFT memory” that can have far-reaching biological implications after initial exposure to ETBF.

Significance:

B. fragilis is an inhabitant of breast tissue, and gut or mammary duct colonization with ETBF triggers epithelial hyperplasia and augments breast cancer growth and metastasis. Short-term exposure to BFT elicits a “BFT memory” with long-term implications, functionally mediated by the β-catenin and Notch1 pathways.

This article is highlighted in the In This Issue feature, p. 995
Performance comparison of fixed and single axis tracker photovoltaic system in large scale solar power plants in Malaysia
Authors: Mahmoud Dawoud Baraa , Chun Lim Siow
Published: January 2021

Malaysia is rapidly expanding the generation capacity of solar power through large scale solar (LSS) projects with the aim to achieve 20% renewable energy mix by 2025. This has motivated many solar industry players to explore the usage of solar PV with single axis tracker (SAT) system. However, many are still hesitant due to the lack of understanding on the comparative performance between fixed mounted solar PV with solar PV with SAT system. This paper aims to provide a comparative analysis on the performance of both systems. Simulation using PVSyst 6.83 was performed in five potential LSS sites spread across Peninsular Malaysia in Perlis, Kelantan, Pahang, Selangor and Johor with the same installed capacity of 10.32MWp. The energy yield and capacity factor for 21 years were simulated. On the average, it was found that SAT outperforms fixed mounted solar PV system by 15.08% based on their performance on their first year operation. 
Probing signals with ZACZ for GPRonboard of unmanned aerial vehicle
Authors: N. Ipanov Roman , A. Komarov Aleksey
Published: January 2021

Modern ground penetrating radars (GPR), designed to determine the thickness of ice or search for the occurrence of aquifers in arid regions of the Earth, are installed either on helicopters or on the earth's surface. The use of a helicopter is economically expensive, and the installation of GPRs on the earth's surface is of a local nature. Modern GPRs mainly use video pulse probing signals and probing signals with linear frequency modulation. These signals have correlation noise, which makes it difficult to obtain a high-quality radar image. In this work, we propose to use a signal with a zero autocorrelation zone (ZACZ) as a probing signal for GPR installed on an unmanned aerial vehicle. In work, a polyphase probing signal with a ZACZ is synthesized and a comparative analysis of the correlation characteristics of the synthesized signal with the optimal phase-code shift keyed signal is carried out. 
Security schemes based on conditional privacy-preserving vehicular ad hoc networks
Authors: A. Al-shareeda Mahmood , Anbar Mohammed , A. Alazzawi Murtadha , Manickam Selvakumar , H. Hasbullah Iznan
Published: January 2021

Recently, vehicular ad hoc networks (VANETs) have been garnering significant inter-est from the people involved in transportation field. Nowadays automotive manufactur-ers have already supplying vehicles with multitude of road sensors that provides many useful characteristics. VANET communication not only offers the drivers and passen-gers with the various safety related services but also provides a wide range of valuable applications. However, the inherent openness of the wireless communication medium used by VANETs exposes vehicles to various security and privacy issues. Researchers have proposed many security schemes to solve the issues mentioned above for the widespread deployment of VANETs. However, these schemes failed to fulfill all as-pects of security and privacy requirements. Besides, these schemes have not provided the performance parameters such as computation and communication costs. The pri-mary emphasis of this paper is on the taxonomy of security schemes based conditional privacy-preserving with respect to strengths and limitations. Besides, a comparison be-tween these schemes related to the model of security and privacy requirements, attacks, and performance parameters is provided. Finally, this paper critically reviews the re-lated works by taking into consideration the design and development of all VANETs security and privacy schemes, this paper could serve as a guide and reference.
Lion optimization algorithm for team orienteering problem with time window
Authors: Taha Yassen Esam , Abdulkhar Jihad Alaa , H. Abed Sudad
Published: January 2021

Over the last decade, many nature-inspired algorithms have been received considerable attention among practitioners and researchers to handle several optimization problems. Lion optimization algorithm (LA) is inspired by a distinctive lifestyle of lions and their collective behavior in their social groups. LA has been presented as a powerful optimization algorithm to solve various optimization problems. In this paper, the LA is proposed to investigate its performance in solving one of the most popular and widespread real-life optimization problems called team orienteering problem with time windows (TOPTW). However, as any population-based metaheuristic, the LA is very efficient in exploring the search space, but inefficient in exploiting it. So, this paper proposes enhancing LA to tackle the TOPTW by utilizing its strong ability to explore the search space and improving its exploitation ability. This enhancement is achieved via improving a process of territorial defense to generate a trespass strong nomadic lion to prevail a pride by fighting its males. As a result of this improving process, an enhanced LA (ILA) emerged. The obtained solutions have been compared with the best known and standard results obtained in the former studies. The conducted experimental test verifies the effectiveness of the ILA in solving the TOPTW as it obtained a very competitive results compared to the LA and the state-of-the-art methods across all tested instances.
Knowledge discovery from gene expression dataset using bagging lasso decision tree
Authors: Sa'adah Umu , Rochayani Masithoh Yessi , Astuti Ani Budi
Published: January 2021

Classifying high-dimensional data are a challenging task in data mining. Gene expression data is a type of high-dimensional data that has thousands of features. The study was proposing a method to extract knowledge from high-dimensional gene expression data by selecting features and classifying. Lasso was used for selecting features and the classification and regression tree (CART) algorithm was used to construct the decision tree model. To examine the stability of the lasso decision tree, we performed bootstrap aggregating (Bagging) with 50 replications. The gene expression data used was an ovarian tumor dataset that has 1,545 observations, 10,935 gene features, and binary class. The findings of this research showed that the lasso decision tree could produce an interpretable model that theoretically correct and had an accuracy of 89.32%. Meanwhile, the model obtained from the majority vote gave an accuracy of 90.29% which showed an increase in accuracy of 1% from the single lasso decision tree model. The slightly increasing accuracy shows that the lasso decision tree classifier is stable.
Compressed domain based robust digital video watermarking scheme to protect the copyright
Authors: Ahuja Rakesh , Ahuja Sachin , Gupta Deepali , Haque Mohd. Junedul
Published: January 2021

Digital video watermarking is an effective way to protect the ownership of the multimedia contents. A novel compressed domain based digital video watermarking algorithm scheme is proposed by exploiting MPEG-2 structure. Watermark bits are embedded in DC and AC coefficients both of only smooth discrete cosine transform (DCT) blocks from selected I-frames in the original digital video. The algorithms never exploited entire frames but explore only three location from the subset of DCT blocks from the subgroup of I-frames only. This process maintains the perceptibility of the watermarked video. Two parameters, normalized correlation (NC) and bit error rate (BER) are used to evaluate the degree of similarity and dissimilarity respectively to check the robustness against image processing and video specific intentional and non-intentional attacks. The security of embedded watermark is enhanced by applying three cryptographic keys. The experimental results demonstrated that the better robustness and perceptibility achieved by comparing the results with the state of art. 
Robust watermarking scheme based LWT and SVD using artificial bee colony optimization
Authors: Mohsin Abdulazeez Adnan , Qader Zeebaree Diyar , M. Hajy Dilan , Asaad Zebari Dilovan
Published: January 2021

This paper presents a watermarking scheme for grayscale images, in which lifting wavelet transform and singular value decomposition are exploited based on multi-objective artificial bee colony optimization to produce a robust watermarking method. Furthermore, for increasing security encryption of the watermark is done prior to the embedding operation. In the proposed scheme, the actual image is altered to four sub-band over three levels of lifting wavelet transform then the singular value of the watermark image is embedded to the singular value of LH sub-band of the transformed original image. In the embedding operation, multiple scaling factors are utilized on behalf of the single scaling element to get the maximum probable robustness without changing watermark lucidity. Multi-objective artificial bee colony optimization is utilized for the determination of the optimal values for multiple scaling components, which are examined against various types of attacks. For making the proposed scheme more secure, the watermark is encrypted chaotically by logistic chaotic encryption before embedding it to the host (original) image. The experimental results show excellent imperceptibility and good resiliency against a wide range of image processing attacks.
A compact FPGA-based montgomery modular multiplier
Authors: Abd-elkader Ahmed A. H. , Rashdan Mostafa , A. M. Hasaneen El-Sayed , F. A. Hamed Hesham
Published: January 2021

This paper presents the FPGA-based implementation of compact montgomery modular multiplier (MMM). MMM serves as a building block commonly required in security protocols relying on public key encryption.  The proposed design is intended for hardware applications of lightweight cryptographic modules that is utilized for the system on chip (SoC) and internet of things (IoT) devices. The proposed design is a modification in the structure of MMM without any multiplication or subtraction processes. The main target of the new modification is enhancing the performance and reducing the area of the MMM hardware module. The operands and internal variables of the proposed hardware circuit is optimized to be bounded to the smallest efficient size to minimize the area and the critical path delay.   The proposed design was coded in VHDL, implemented in the Virtex-6 FPGA, and its performance was analyzed utilizing XILINX ISE tools. Our design occupies the smallest area comparing with other implementations on the same FPGA type. The proposed design saves in a range between 60.0 and 99.0% of the resources compared with other relevant designs.
Duobinary modulation/predistortion techniques effects on high bit rate radio over fiber systems
Authors: M. A. Eid Mahmoud , S. Seliem Ashraf , Zaki Rashed Ahmed Nabih , A. Mohammed Abd El-Naser , Ali Mohamed Yassin , S. Abaza Shaimaa
Published: January 2021

The work has presented duobinary modulation and predistortion techniques for the radio over fiber system enhancement for achieving security level. Duobinary modulation technique has more compact modulated spectral linewidth with standard non return to zero modulation code. Different NRZ/RZ rectangle shape employed that are namely exponential rectangle shape (ERS), and Gaussian rectangle shape (GRS) for different transmission bit rates. Switching bias voltage, and switching RF voltage based LiNbO3 modulator are changed to measure the performance parameters of the radio over fiber (RoF) system. Predistortion technique improves the linearity of transmitter amplifiers and it is considered as a power efficiency technique. The optimum values of the Q-factor, data error rate (BER), electrical power, signal gain, noise figure, and light signal/noise ratio are achieved with 8 Volt for both switching biases/switching RF signal at 100 GHz. Signal quality/BER and electrical power after the receiver enhancement ratio by using this technique at different RF signal frequencies. 
apport de l’épistémologie de René Thom à la sémiotique
Authors: Wildgen Wolfgang
Published: January 2021

La pensée épistémologique de René Thom montre deux facettes qui correspondent grossièrement à deux périodes de sa recherche scientifique : (a) un platonisme mathématique qui recherche le corrélat des structures topologiques dans la réalité des phénomènes (la période de 1965 à 1977), et (b) la critique du paradigme galiléen en physique expérimentale et la pertinence d’une philosophie de la nature appliquée à la biologie et à la sémiotique (la période de 1978 à 1990). Les deux positions peuvent être analysées d’une part en partant du livre Stabilité structurelle et morphogenèse de 1972 et de son programme d’une analyse qualitative basée sur la théorie des catastrophes (ensemble avec Christopher Zeeman), d’autre part basé sur le livre de 1988 avec la vision d’une sémiophysique et un programme qui se met à la recherche des forces qui sélectionnent et canalisent la morphogenèse du sens (et qui permettent de constituer une sémantique en linguistique et une sémiotique dynamique). L’épistémologie de Thom peut être interprétée dans le contexte de la tradition philosophique de Leibniz à Kant et Husserl. Jean Petitot explique les rapports tout en considérant la sémiotique de Greimas et les recherches cognitives en linguistique et en neuropsychologie. Ces aspects historiques sont discutés brièvement. Cet article essaie de clarifier et d’évaluer la portée épistémologique des travaux de Thom pour la sémiotique et la linguistique. Il poursuit le but non seulement de faire comprendre cette contribution au débat épistémologique, mais aussi de circonscrire le potentiel épistémologique de la pensée morphodynamique de René Thom pour la sémiotique et la linguistique.
Naturalité de la catégorisation sémiotique: de la genèse perceptuelle à la déférence sémantique à l’égard du référent
Authors: Leclercq Bruno
Published: January 2021

En revenant « aux sources (naturelles) du sens », les Principia Semiotica du Groupe µ jettent un solide pavé dans la mare de toute une tradition sémiologique qui, partant des textes linguistiques (puis visuels), avait plutôt insisté sur la grande inventivité et la grande diversité culturelle des systèmes de signes. En soulignant la dimension résolument naturelle et motivée de la sémiose, le Groupe µ s’en prend frontalement à un certain « axiome de conventionalité » dominant dans la sémiologie contemporaine, notamment dans son paradigme structuraliste. Par le même geste, le Groupe µ s’en prend aussi en droite ligne à une épistémologie d’« idéalisme linguistique (ou plus généralement symbolique) », qui s’est imposée dans la seconde moitié du XXème siècle sous l’influence d’un certain « tournant linguistique » et qui a vu, dans les catégorisations conventionnelles, la source de toute sémiose mais aussi de toute production de connaissance. Par son attention aux sources perceptuelles de la sémiose la plus originaire, le Groupe µ réhabilite tout à la fois une certaine épistémologie réaliste, qui estime que le monde est déjà organisé avant sa structuration dans telle ou telle langue et qu’il motive même cette structuration, et une certaine épistémologie empiriste, qui voit dans l’expérience sensible le lieu de cette motivation et dès lors la source première de la sémiose et de la connaissance. En insistant sur la continuité des processus cognitifs naturels qui régissent cette sémiose avec d’autres dispositifs matériels présents dans le monde animal ou même vivant, la sémiogénétique s’avère aussi solidaire d’une épistémologie plus naturaliste et matérialiste que culturaliste et « glossocentriste ». Reste toutefois que les étapes ultérieures de la sémiose (avec la fonction de renvoi propre à la sémiose indirecte ou l’interprétation propre à la sémiose consciente) rendent, pour le Groupe µ, toute sa place à une sémiose intersubjective plus arbitraire et culturellement dépendante. À partir de nos propres travaux sur la déférence sémantique, nous montrons cependant que la division du travail linguistique, qui garantit cette intersubjectivité du sens, n’implique pas forcément la conventionalité qu’on lui associe généralement, mais qu’elle peut elle aussi, pour certains signes au moins, être liée à une épistémologie réaliste qui s’attache à la motivation naturelle plutôt qu’à l’arbitraire conventionnel de la sémiose.
Na biblioteca vaginal: um discurso amoroso
Authors: Leal Aline , Castanheira Daniel
Published: January 2021

A biblioteca vaginal não é uma metáfora. Feita e transportada por mulheres, foi uma resistência encarnada à tirania da ditadura argentina. O trabalho da biblioteca vaginal é derivado das práticas das prisioneiras, mas o seu alcance vai além dessas mulheres e se estende para todos os tipos de resistência cultural que estavam ocorrendo nas condições mais adversas durante o regime ditatorial. Na biblioteca vaginal, encontramos os adolescentes do Teatro Cucaño, um pequeno grupo experimental de teatro da cidade de Rosário, bem como os renomados intelectuais da revista Punto de Vista. Homens e mulheres trabalharam para documentar e refletir sobre um período de terror e extremismo por meio de atos criativos e intelectuais que geralmente não conseguiam encontrar uma audiência fora do ambiente hermético e improvável da biblioteca vaginal. Este ensaio é uma história parcial da cultura intelectual subterrânea da última ditadura argentina.
O meio, a mensagem e suas origens: um estudo acerca do processo criativo divulgado no blog de Adam Curtis
Authors: Silva Rafael Ghiraldelli da
Published: January 2021

Este trabalho analisa como as postagens no blog oficial do cineasta britânico Adam Curtis (1955- ) – The Medium and the Message () – oferecem múltiplos insights sobre o processo criativo de vários de seus últimos projetos no campo do audiovisual. Trabalhando quase que exclusivamente com séries e longas-metragens documentais para os canais de televisão da BBC, Curtis desenvolve há anos uma marca autoral de montagem cinematográfica que consiste na progressiva eliminação de entrevistas com especialistas. Dá-se lugar para o uso extensivo de imagens de arquivo – e nisso, ressignificações acontecem na medida em que tais imagens (e sons) são justapostas e/ou comentadas dentro da argumentação da voz over do saber[1]. Portanto, o que o blog de Curtis nos oferece é, em grande medida, um olhar para os bastidores – isto é, uma divulgação daquilo que se passa na mente (e na mesa de trabalho) de Curtis durante a pré-produção de seus filmes e séries, e que demonstra não só suas virtudes criativas, mas também sua forte consciência tecnopolítica.[1] NICHOLS, Bill. Introdução ao documentário. 5. ed. Campinas: Papirus, 2005.
Rascunhos do Contemporâneo III
Authors: Cabral Cleber Araújo , Kaspar Katerina Blasques , Hafter Lea
Published: January 2021

Este é o editorial do terceiro volume da série Rascunhos do Contemporâneo.
Por uma ciência da imagem: Crítica de Processos de criação e psicanálise como pilares teóricos
Authors: Martinelli Paula
Published: January 2021

O debate acadêmico sobre a imagem de arte deixa clara sua substância complexa. Este artigo pretende contribuir com as recentes discussões, utilizando-se das perspectivas teóricas encontradas na crítica de processos de criação e na psicanálise para, assim, tratar a imagem como fenômeno imerso em circunstâncias políticas e históricas; interface de troca entre sujeitos; movimento que se torna presença em diferentes épocas e contextos. Privilegia-se uma abordagem interdisciplinar que concilia conhecimento acadêmico e práticas artísticas, explorando as interações entre sujeitos como não-lineares, inferenciais, mnemônicas, imaginativas e geradoras de sentido. O presente trabalho sugere o aprofundamento de vínculos teóricos, destacando possíveis caminhos para uma epistemologia da imagem compatível com os procedimentos artísticos.
Processo de Criação e Gênese Imaterial da Poesia de Luiz Bacellar
Authors: Leão Allison Marcos , Moreira Luana Aguiar
Published: January 2021

Este texto expõe conclusões obtidas durante a realização de um “Estudo sobre uma poética da repetição: Frauta de barro, de Luiz Bacellar” (1928-2012), poeta amazonense integrante do mais importante movimento cultural do Amazonas no século XX, o Clube da Madrugada. Neste estudo, buscamos compreender que sentidos haveria no gesto de reedição de sua principal obra (Frauta de barro), sempre em diferença, dado que ela teve sete edições, todas com variações significativas. Durante o estudo, levantamos aspectos que estruturam a obra de Bacellar, como suas fontes literárias e artísticas, os estilos poéticos revisitados nos poemas e os conteúdos da cultura popular que circularam dos espaços públicos (e populares) de enunciação para a obra. É curioso que, mesmo com tantas fontes verificadas como estruturantes de Frauta de barro, seu autor não tenha deixado vestígios da criação – entendidos em termos documentais: prototextos, manuscritos, rascunhos, esboços etc. Porém, defenderemos a ideia de que, para uma obra nessas circunstâncias, os bastidores da criação devem ser rastreados para além dos documentos de processo habituais. Assim, elencaremos as fontes que nossos estudos encontraram no campo da produção cultural de natureza popular que serviram como base da composição de Frauta de barro (“causos” populares, cordel, espaços e práticas comunitárias etc.). Em seguida, ponderaremos o grau de inserção e as relações que esses conteúdos passaram a ter para a compreensão da obra e para seu processo de criação.
O poeta no Museu: textos inéditos de João Cabral de Melo Neto
Authors: Ribeiro Edneia Rodrigues
Published: January 2021

No ano em que é celebrado o centenário de nascimento do poeta João Cabral de Melo Neto, a descoberta de seus textos inéditos acrescenta mais um motivo às comemorações. O material foi encontrado no Arquivo-Museu de Literatura Brasileira, da Fundação Casa de Rui Barbosa. Além de buscar reconstruir os passos da pesquisa que culminou na descoberta de dezenas de textos em prosa-ensaística, mais de cinquenta poemas inéditos e outros dispersos, o presente artigo fará um breve levantamento dos documentos encontrados e apresentará alguns deles.
The Relationship between Three Short Indigenous Chinese Buddhist Scriptures and the Textual Practices Found in their Dunhuang Manuscript Colophons
Authors: Chen Ruifeng
Published: January 2021

This article studies the relationship between colophons for, and the content of, Dunhuang manuscripts of three indigenous Chinese Buddhist scriptures: the Jiu zhuzhongsheng kunan jing, the Xin pusa jing, and the Quanshan jing. I find that the aspirations for copying these scriptures and the ways of using them are mostly consistent with their content. The patrons or users of these scriptures seem to have largely understood their content. Also, the similarities in the content, and the length of the Jiu zhuzhongsheng kunan jing and the Xin pusa jing should be two factors that account for why these scriptures were frequently copied as one set. Concerns for one’s own family and the relevant instructions in the texts may have led patrons to prefer to copy the Xin pusa jing twice, but the other two scriptures only once as a single scribal act.
The Morphophonemics of Weak Triliteral Stems in Standard Arabic: A Generative Phonology Perspective
Authors: Abdel-Malek Zaki N.
Published: January 2021

The “weak” triliteral stems of Standard Arabic have been studied in considerable detail by Arab as well as Western grammarians. In most cases, however, the treatment has been largely limited to listing and classifying the primary data, which satisfies observational adequacy but fails to meet the essential requirements of descriptive adequacy, simplicity and generality. In a few cases rules have been proposed, but these rules fall short of expectations: on the whole, they strike the user as complex, arbitrary and unmotivated. Drawing on the theory of Generative-Transformational Grammar, I have formulated a small set of rules which seek to satisfy all of the three essential requirements, and thus render the subject more palatable to scholars as well as learners of Standard Arabic.
A Leaky-Integrate-and-Fire Neuron Model of Spontaneous Reset of Thin-Film Metal-Oxide Resistive Switches
Authors: Eshraghian Jason K. , Lee Jaeheum , Kim Sungjin , Eshraghian Kamran , Cho Kyoungrok
Published: January 2021

Resistive switches in crossbar arrays introduce one potential option to push past the limits of CMOS process scaling, with advantages including low switching thresholds (<3 V), high integrability with CMOS, and fast switching speeds (<10 ns). These typically employ a 1T1R scheme
for each cell, where the transistor is deployed for selection and sneak path mitigation. However, when conductive filaments are formed in metal-oxide resistive switches, it is often the case that analog states are not thermodynamically favorable, and will spontaneously set or reset to a more
stable state. This causes stochastic switching, variability, and non-reproducibility, in a manner which cannot be harnessed in stochastic gradient descent. Equally important is the memory leakage problem that is introduced. In this work, we present a generalized neuron model of resistive switching
in the development of a phase plane characterization, and verify its operation by comparing it to our own in-house fabricated thin-film titanium-oxide memristor array. We show an alternative design methodology that draws inspiration from the leaky-integrate-and-fire neuron model. The advantages
exhibited by such a methodology are to provide more biologically accurate neuronal model and to enable large scale simulations, demonstrated by the 30% improvement in speed over similar device models.
Microstructure, Electrical and Thermal Conductivity of the As-Extruded Al-xMM (Mischmetal) Based Alloys
Authors: Kim Yong-Ho , Yoo Hyo-Sang , Lee Seong-Ho , Lee Gyu-Seok , Son Hyeon-Taek
Published: January 2021

The effect of addition of Mischmetal (MM) on the microstructure, electrical and thermal conductivity, and mechanical properties of the as-extruded Al-MM based alloys were investigated. The studied AlxMM alloys (where x = 0.2, 0.5, 1.0, 1.5, 2.0 and 5.0 wt.%) were cast
and homogenized at 550 °C for 4 h. The cast billets were extruded into 12 mm bars with an extrusion ratio of 39 at 550 °C. The addition of MM resulted in the formation of Al11(Ce, La)3 intermetallic compounds and the area fraction of these intermetallic compounds
increased with an increase in the MM content. The Al11(Ce, La)3 phase, which was distributed in the as-cast alloys, was crushed into fine particles and arrayed along the extruded direction during the extrusion process. In particular, these intermetallic compounds in the
extruded Al-5.0MM alloy were distributed with a wide-band structure due to the fragmentation of the eutectic phase with a lamellar structure. As the MM content increased from 1.0 wt.% to 5.0 wt.%, the average grain size decreased remarkably from 740 to 73 μm. This was due to formation of
Al11(Ce, La)3 particles during the hot extrusion process, which promoted dynamic recrystallization and suppression of grain growth. The electrical and thermal conductivity of the extruded alloys containing up to 2.0 wt.% MM were around 60.5% IACS and 230 W/m ·
K, respectively. However, the electrical and thermal conductivity of the extruded alloy with 5.0 wt.% MM decreased to 55.4% IACS and 206 W/m · K, respectively. As the MM content increased from 1.0 wt.% to 5.0 wt.%, the ultimate tensile strength (UTS) was improved remarkably from 74
to 119 MPa which was attributed to the grain refinement and formation of Al11(Ce, La)3 intermetallic compounds by the addition of MM.
Nano-Crystallization Behavior and Optical Properties of Diopside: Eu2O3-Based Glass-Ceramic System
Authors: Kang Byeong-Guk , Kang Seung-Gu
Published: January 2021

In this study, glass-ceramic was prepared by adding TiO2 as a nucleating agent to induce the internal crystallization behavior of diopside (CaO-MgO-2SiO2)-based glass. The optimum composition for producing a transparent glass-ceramic was a composition of 15 wt%
of TiO2 mixed with 85% diopside. The light transmittance of the specimen decreased as the heat treatment temperature increased. When 394 nm excitation light was incident on the glass-ceramic containing 0.05% Eu2O3, red light of 614 nm wavelength emitted. We
examined the relationship between the light emission mechanism and the crystal structure of the diopside-based glass-ceramic. We also discussed the applicability of the specimens prepared in this study as light emitting materials in various fields.
Effects of Constituent Phases on Oxidation Kinetics of Al–Mg Alloys Containing a Trace of Ca
Authors: Bae Chul-Hong , Ha Seong-Ho , Kim Bong-Hwan , Yoon Young-Ok , Lim Hyun-Kyu , Kim Shae K. , Kim Young-Jig
Published: January 2021

In this study, the effects of constituent phases on the oxidation kinetics of an Al-7 mass%Mg alloy containing a trace of Ca were investigated. A Mg+Al2Ca master alloy was used to add Mg and Ca simultaneously. Scheil-Gulliver cooling by thermodynamic calculation showed that
the addition of Ca led to the formation of Ca-based intermetallic compounds, such as Al4Ca and Laves C36, after solidification. Based on weight increase indicated by the oxidation test and surface analysis, it was found that the presence of Ca-based phases significantly improved
the oxidation resistance and slowed down the oxidation rates. Based on the review of phase diagrams with oxygen partial pressure by thermodynamic calculation, it was thought that in the initial oxidation, MgO and MgAl2O4 were formed on the surfaces of the Al–Mg
alloys, leading to further oxidation. The Ca-based intermetallic compounds formed Ca–Mg–Al based oxides, which possibly contributed to the formation of a relatively dense oxide layer.
Preparation and Properties of CA/γ-Poly(glutamic acid)/ZnO Electrospun Membranes
Authors: Li Qiuzhu , Hou Xiaochen , Guo Yiqiao , Hu Xiyu , Jiang Dong
Published: January 2021

Cellulose acetate (CA) fibrous membranes blended with poly-(γ-glutamic acid) (γ-PGA) and ZnO were produced via electrospinning. The performance of the obtained composite membrane was investigated by scanning electron microscopy (SEM), Fourier transform IR spectroscopy, tensile
test, water contact angle, and thermogravimetric analysis. The corn plant height, leaf area and SPAD (soil and plant analyzer development) were compared with plants covered with CA/γ-PGA and CA/γ-PGA/ZnO fibrous membranes at room temperature. Simultaneously, the water absorption
and degradation rate were also studied. The results obtained indicate the potential use of these fibrous membranes for mulching film applications. The fibrous membranes could also find potential use as a material for food packing, facial mask and as antimicrobial films for wound dressing.