bluuebunny/crossref_metadata_2025 huggingface dataset:
Ahots sintetiko pertsonalizatuak: esperientzia baten deskribapena
Authors: Hernáez Rioja Inmaculada , Navas Cordón Eva , Saratxaga Couceiro Ibon , Sanchez de la Fuente Jon
Published: October 2021

Ahotsa ezinbestekoa da giza komunikaziorako, eta haren galerak eragin handia du pertsonak gizartean integratzeko prozesuan. Testu-ahots bihurketak ahots sintetikoa eman diezaieke ahozko desgaitasuna duten pertsonei. Irtenbide arruntenek ahots estandarra izaten dute normalean, eta, horregatik, erabiltzaile batzuek zailtasunak dituzte beren burua ahots horrekin identifikatzeko. Horregatik, ahots sintetiko pertsonalizatuak sortu behar dira, eta ahozko desgaitasuna duten pertsonei ahots-katalogo bat eskaini behar zaie, beren beharretara egokitzen den ahots bat aukeratu ahal izan dezaten. ZureTTS proiektuaren helburua ahots pertsonalizatu horiek ematea da, bai gaztelaniaz, bai euskaraz. Ahotsa galduko duten pertsonek edo ahotsik ez dutenei ahotsa eman nahi dieten pertsona altruistek 100 esaldi grabatzen dituzte, AhoMyTTS web-atariaren bidez. Esaldi horiekin, egokitze-prozesu bat egiten da, grabaketako ahotsaren antzeko ahots sintetiko bat sortzeko. Erabiltzaileari sintesi-motor bat ematen zaio ahots pertsonalizatu horrekin batera, ahozko mezuak sortzea eskaintzen duten aplikazioetan erabiltzeko. Gainera, ahots-katalogo bat ere badago, grabaketarik egin ezin duen pertsona batek ahots horien artean gustukoena aukeratu dezan. 1.200 pertsonak baino gehiagok erabili dute sistema hori ahots pertsonalizatu bat lortzeko, eta haietatik 58 hautatu ditugu katalogoan sartzeko. Erabiltzaileei egindako inkestek erakusten dute gustura daudela ahots sintetikoaren hainbat alderdirekin: gehienen ustez, ahots sintetikoa jatorrizkoaren antzekoa da, atsegina eta argia, baina robotiko samarra. Lan honek garapen jasangarrirako 10. helburuari laguntzen dio, herrialde bakoitzaren barneko eta herrialdeen arteko desberdintasunak murriztuz. Era berean, garapen jasangarrirako 4. helburuari ere laguntzen dio, guztiontzako kalitatezko hezkuntza inklusiboa nahiz bidezkoa bermatzea errazten duten tresnak eskainiz.
Bigarren helburua: gosea ezabatzea, benetan bilatzen ez den helburua
Authors: Areskurrinaga Mirandona Efren
Published: October 2021

Gaur egun, oraindik ere milioika pertsona gose da munduan, elikagaien ekoizpena asko handitu eta populazioaren igoeraren gainetik hazi bada ere. 768 milioi pertsona azpielikaturen arazoa merkatuetan dauden elikagai horiek eskuratzeko nahiko errenta ez izatean datza finean, ez elikagai faltan. Izan ere, globalizazio-prozesu neoliberalak elikadura-eredu industrial globalizatuaren aldeko bide sendoak eraiki ditu azken hamarkada hauetan. Baina, elikadura-sistema globala eratzearekin batera, nekazaritzaren produkzioaren ereduak aldatu dira, jarduera modernizatzeko ustezko beharraren izenean. Eremu globalaren dinamikak eta nekazaritza-politiken erabakiek eragin itzela izan dute tokiko baserritarrengan eta elikadura-sistemen joeretan, eta argi-itzalak sortu dituzte haien garapenean. Itzalak hizpidera ekarriz, hainbat herrialde eta milioika pertsonaren elikadura-ziurgabetasuna areagotu dute, baita gosea nabarmen hedatu ere munduko biztanlerian. Elikadura-sistema global horren egungo joerak mantentzen badira, ezinezkoa izango da Garapen Iraunkorrerako Bigarren Helburua betetzea, hau da, gosea eta beste nutrizio-gabezia batzuk amaitzea, ez 2030. urterako, horixe baita hartutako konpromisoaren epemuga, ezta aurreragorako ere. Egoera larri hori iraultzeko, egungo ekonomia-politika liberalizatzaileak elikaduraren eta nekazaritzaren sistemetatik eta haien gaineko politiketatik alboratu behar dira, eta nekazaritzan oinarritutako elikadura- eta nekazaritza-sistema iraunkorrak sortu, herrialdeen burujabetza eta elikagaien elikadura-funtzioa berreskuratuz, mozkin-iturrietatik haratago.
Aplikazio biomimetikoak itsas energien atzemate-gailuetan
Authors: Izquierdo Urko , Vázquez Asier , Blanco Jesús María , Bidaguren Iñigo , Esteban Gustavo Adolfo , Peña Alberto , Albaina Iñigo , Soto Manuel , Díez Guzmán
Published: October 2021

Natura inspirazio-iturri gisa aztertzeak itsasotik datorren energiaz baliatzeko makinak diseinatzea eragin du. Dokumentu honek biomimesian oinarrituriko itsas gailuak aztertzen ditu, haien portaeraren ondorioz energia bereganatzea errazten duten horietan oinarrituz [1]. Azkenik, marrazoen larruazala jariakinaren muga-geruza apurtzea ahalbidetzen duten espikula txikiz osatuta dagoenez, haren mugimenduarekiko erresistentzia murriztuz [2], eta fenomeno horretan oinarrituz, olatuak sortzeko erabiltzen diren olatu-kanaletan (waveflumes) energia xahutzeko sistemetan aztertzen den aplikazioa zehaztuko da.
Laser-testurizazio prozesurako eredu matematikoa
Authors: Murua Oihane , Arrizubieta Jon Iñaki , Ostolaza Marta , Lamikiz Aitzol , Ukar Eneko
Published: October 2021

Proiektu honetan laser-testurizazio prozesuaren zenbakizko eredua garatu da. Horretarako, lehendabizi laser-testurizazio prozesuaren informazioa bildu da, ondorengo programazioan errealitatearen hurbilpen egokia simulatu ahal izateko. Aurrez aipatutako fabrikazio-prozesu honen jakintza eskuratu ostean, ekintza berbera irudikatzen duen eredu matematikoa sortzeko beharrizana ikusi da. Horrela, lanaren metodologia hiru pausotan antolatu da: lehenik, laser-testurizazio prozesu baten eredu hurbildu bat sortu da; ondoren, prozesu errealaren saiakuntza esperimentalak egin dira; eta azkenik, lortutako emaitzen arteko alderaketaren bitartez eredua balioztatu da. Ereduaren garapena Matlab-eko PDE moduluaz baliatuz egin da eta pieza bateko gainazaleko puntu zehatzen lurruntzea simulatzeko gaitasuna dauka. Simulatutako ereduan sortzen diren kraterrak, nanosegundoko pultsuak igortzen dituen laser baten bitartez erreproduzitzeko saiakuntzak egiten dira. Laser-testurizazioa simulatzen duen eredua egiaztatu ahal izateko, simulazioetatik lortutako emaitzak saiakuntza esperimentaletan lortutakoekin alderatu dira eta emaitzen artean korrelazio oso ona lortu da: kraterren diametroan eta sakoneran 5 eta 0,5 mikretako erroreak lortuz, hurrenez hurren. Horrela, garatu den eredu matematikoa eta jarraitutako prozedura balioztatuta gelditu dira.
A Pestis secunda em Portugal (1362)
Authors: Oliveira da Silva André Filipe
Published: October 2021

Este artigo tem como objetivo principal sistematizar um conjunto de dados documentais e cronológicos sobre a Pestis secunda, primeira epidemia de peste que ocorreu na Europa após a célebre Peste Negra, procurando determinar de forma aproximada a cronologia do evento em Portugal. Pouco mais de uma década depois da sua antecessora, esta epidemia provou que a doença passaria a ser recorrente, e algumas fontes excecionais permitem contestar a leitura de que o silêncio das restantes traduza um impacto menor na vida daqueles que a ela sobreviveram.
Los sellos de validación de los concejos de Córdoba, Sevilla y Cádiz (siglos XIII-XIV)
Authors: Mestre Navas Pablo Alberto
Published: October 2021

La difusión del sello como instrumento de validación documental, coincidió con la creación de las instituciones concejiles andaluzas con ocasión de la conquista castellana del valle del Guadalquivir. La instauración del modelo concejil en Andalucía supuso la creación de nuevas instituciones, que necesitaron de sellos diplomáticos para la expedición de sus documentos. En este trabajo se ahonda sobre las improntas de los concejos de Córdoba, Sevilla y Cádiz, su creación y su uso como instrumento garante del negocio documentado, analizándose algunas de sus particularidades representativas más significativas.
Pendidikan Toleransi Beragama, Sebuah Kajian Sosiologi Tentang Peran Sekolah dalam Membangun Hubungan Antarkelompok Beragama
Authors:   Universitas Indonesia, Kurniawan Kevin Nobel
Published: October 2021

Buku ini memaparkan secara kritis dan seimbang terhadap fenomena intoleransi keagamaan. Oleh karena itu, buku ini bukan-lah sebuah karya keagamaan ataupun karya yang ingin menyudutkan sebuah kepercayaan yang dimiliki oleh suatu kelompok keyakinan. Dalam buku ini, selain mengkaji mengenai masalah intoleransi di Indonesia, juga mengulik tentang perkembangan pendidikan di Indonesia, toleransi beragama, dan kurikulum terselubung, serta refleksi dalam memaknai toleransi beragama. Temukan informasi tentang contoh dan metode pendidikan yang dapat diimplementasikan di sekolah untuk mengajarkan mengenai pendidikan toleransi beragama.
Photophysical Studies on Drug Conjugates of Stavudine/Zidovudine
and 1,8-Naphthalimide in Different Solvent Systems
Authors: Singh Nidhi , Naaz Farha , Verma Rajesh , Singh Shivendra , Singh Ramendra K.
Published: October 2021

A number of fluorescent conjugates of popular anti-HIV drugs 2′,3′-didehydro-2′,3′-dideoxythymidine
(stavudine, d4T) and 3′-azido-3′-deoxythymidine (zidovudine, AZT) with 1,8-naphthalimide were
synthesized using the coupling reagent dicyclohexylcarbodiimide (DCC) in the presence of
4-dimethylaminopyridine (DMAP) and N,N-dimethylformamide (DMF) as solvent at room temperature.
The steady-state fluorescence measurement studies on these conjugates showed solvatochromic effect.
Further, the fluorescence of drug conjugates was recorded in the presence of ions like Na+ and K+ at
body level concentration of 135-145 mmol L-1 and 3.6-5.1 mmol L-1, respectively, in phosphate buffer
at pH 7.4 in aqueous media. It was observed that the drug conjugates did not show appreciable
fluorescence quenching in presence of ions and buffer.
Response Surface Method Aided Development and Validation of Stability Indicating
RP-HPLC-UV Method for Impurities of Dextromethorphan Hydrobromide in
API and Three Marketed Formulations
Authors: Alam Md Irshad , Siddiqui Aquil-Ur-Rahim
Published: October 2021

An innovative, specific, economical and precise method was developed and validated by employing
reverse phase high performance liquid chromatography (HPLC) for contemporaneous estimation of
dextromethorphan hydrobromide (DHB) along with its impurities in liquid formulation with forced
degradation studies and confirmation of content of DHB in composition label in three market
formulations along with their impurities were detected by this method. The optimized chromatographic
conditions comprised of column (25 cm × 0.46 cm) × 5 μm Kromasil C8 bearing flow rate of 1.5
mL/min and wavelength 220 nm for UV-estimation. Design of experiments were implemented by
following Box Behnken design with most optimum parameters selected as follows, column temperature
(A), flow rate (B) and pH (C) with corresponding responses comprised of resolution between related
compound A (RCA) and DHB (Y1), tailing of DHB (Y2) and resolution between related compound B
(RCB) and DHB (Y3). Stress testing was performed and proved that method was stable as no interfering
peaks were observed. All validation parameters including suitability, linearity, accuracy, specificity,
limit of detection, limit of quantitation, ruggedness, robustness and stress study were evaluated as per
updated ICH guidelines and found to be within limit for pure DHB and detected impurities.
Metal Complexes of Schiff Bases of 3-Hydroxyquinoxaline-2-carboxaldehyde Encapsulated in Zeolite Y Cages: Potential Catalyst for Removing Phenol from Effluent Media
Authors: Suja N.R. , Sharmila T.K. Bindu , Amrutha S.R.
Published: October 2021

Transition metal complexes are known to be efficient catalyst for many organic transformations.
Encapsulation of metal complexes in zeolite cage brings many significant modifications in the structure
of the metal complexes, which are very interesting from the catalytic point of view. This study aims in
a comparative evaluation of the influence of structure of neat and encapsulated complexes in their
catalytic activity. Phenol is one of the major industrial pollutants. Heterogenizing transition metal
Schiff bases by encapsulation inside the zeolite would help to minimize the reuse problem of transition
metal complexes. This article deals with the synthesis, characterization and catalytic activity studies of
Co(II), Ni(II) and Cu(II) complexes of 3-hydroxyquinoxaline-2-carboxaldehyde with ethylenediamine
(L1) and an o-phenylene diamine (L2).
Chemical Constituents of Suaeda monoica and its Biological Activity
Authors: Abdelgawad Ahmed A.M. , El Bassossy Taha A.I.
Published: October 2021

The ethanolic extract of the aerial parts of Suaeda monoica was successively fractionated using
petroleum ether, dichloromethane, ethyl acetate and methanol. The GC-MS analysis of dichloromethane
fraction has resulted in the identification of 24 non-polar compounds. N,N-dimethyl-1-dodecanamine
(19.13%), methyl (Z)-9-oleate (18.1%) and 2-methoxy-3-(2-propenyl)phenol (12.14%) were the major
components and fatty acids methyl esters represented the major class of this nonpolar components.
Phytochemical study of the ethyl acetate and methanol fractions led to isolation and identification of
seven known compounds identified as pyrogallol, ferulic acid, luteolin, (+)-catechien, gallic acid,
naringin and naringenin. Dichloromethane, ethyl aetate and methanol fractions exhibited weak to
moderate antioxidant activity using DPPH free radical scavenging method. Ethyl acetate and methanol
fractions showed no antifungal activity and weak to good antibacterial activity by diffusion agar
technique, while the dichloromethane showed potent activity against all the tested strains. Different
fractions revealed weak lipase inhibitory effect.
Synthesis, Characterization and Antimicrobial Activity Studies of
Chlorocobaloximes with Neutral Bases Containing Amine Functionality
Authors: Vijaikanth V. , Vasuki S. , David C. Immanuel , Chandran L. , Sowmya S. , Murugan S.
Published: October 2021

The inorganic cobaloximes of type [Co(Cl)(dmgH)2B]; where dmgH = dimethyl glyoxime and B =
neutral bases: glycine, ethyl amine, 2-aminopyridine, 4-aminopyridine, 2,6-diaminopyridine, aniline
and 1-napthylamine have been synthesized. The synthesized cobaloximes were characterized by IR,
UV-visible, 1H NMR and 13C NMR spectroscopic techniques. The cobaloxime complexes were screened
for their antibacterial activity against methicillin resistant Staphylococcus aureus (MRSA) and
Acinetobacter baumannii by the zone of inhibition test, biofilm eradication on biomaterial using catheter
and modified Congo red agar method. It has been found that the cobaloxime complexes exhibit inhibition
against both gram positive and gram negative bacteria and the cobaloximes showed better inhibition
towards Gram-negative bacteria compared to Gram-positive bacteria.
Preparation, Characterization and Applications of
Chitosan-Nanosilica-Graphene Oxide Nanocomposite
Authors: Grace A. Sahila , Littis Malar G.S. Prabha
Published: October 2021

In present study, a simple low cost method was used to prepare chitosan-nanosilica-graphene oxide
(CS-NSi-GO) nanocomposite. Nanosilica and graphene oxide were synthesized from coconut husk
ash and chitosan was synthesized from shrimp shell. Nanosilica was synthesized from coconut husk
ash with alkaline extraction using sodium hydroxide followed by precipitation method using sulphuric
acid. Graphene oxide was synthesized from the oxidative treatment of the raw material of coconut
husk ash. After the synthesis of silica, the carbonized graphite was collected and treated by modified
Hummer’s method. The CS-NSi-GO nanocomposite was prepared by condense polymerization method.
Various analytical methods such as Fourier transform infrared (FTIR) spectroscopy, Fourier transform
Raman (FT-Raman) spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray
analysis (EDAX) and transmission electron microscopy (TEM) were used to characterize the
CS-NSi-GO nanocomposite. Eventually antibacterial, antifungal, antioxidant and cytotoxicity of the
prepared nanocomposite were also evaluated.
JURISDIÇÃO POLIVALENTE: NOVOS TEMPOS, VIRTUDES ANTIGAS
Authors: Salles Bruno Makowiecky
Published: October 2021

Este artigo reúne reflexões sobre o exercício da Jurisdição em um contexto de Acesso à Justiça, de Judicialização e dos desafios qualitativos e quantitativos hoje existentes. Para tanto, fornece-se um panorama do cenário vigente e articulam-se aspectos do desempenho da Jurisdição com novos fatores como a crise do Positivismo jurídico, a aplicação de normas e os princípios constitucionais, o Ativismo e a Autocontenção e as funções cotidianas dos juízes. O objetivo é o de expor, com humildade científica, diretrizes que priorizem uma atuação técnica, criteriosa e ponderada dos juízes no ambiente democrático, dentro da antiga ideia de equilíbrio simbolizada na balança da justiça.
BREVE ANÁLISE DA EVOLUÇAO E STATUS QUO DAS UNIDADES DE CONSERVAÇÃO NO CERRADO BRASILEIRO
Authors: Vinícius Gonçalves Ribeiro Carlos , Antônio Coimbra Borges Luís
Published: October 2021

Os altos níveis de exploração dos recursos naturais resultaram em uma elevada degradação ambiental, provocando impactos negativos na biodiversidade dos ecossistemas naturais. Uma das ferramentas para minimizar os impactos na natureza é a criação de Unidades de Conservação (UCs). Buscando compreender a situação das UCs no Cerrado brasileiro, este estudo tem como objetivo identificar a evolução das UCs no bioma ao longo de 70 anos. Os dados utilizados na pesquisa foram coletados no banco de cadastro de UCs do Ministério do Meio Ambiente. Observou-se que as primeiras UCs foram criadas em 1949 e o período de maior crescimento de UCs ocorreu entre 1990 e 2009. Constatou-se que apenas 8,72% do território do Cerrado encontra-se atualmente protegido. A maior parte das UCs estão enquadradas no grupo de Uso Sustentável, pertencem a esfera administrativa federal e não possuem plano de manejo. É necessário um melhor planejamento na criação e gestão dessas áreas, assim como, deve se adotar critérios para definição do tamanho e alocação das unidades na paisagem, visando garantir a maior conservação da biodiversidade do bioma Cerrado.
Estudio de QoS (Quality of Service) y QoE (Quality of Experience) para servicios web consumidos desde un mashup móvil
Authors: Enriquez Juan Gabriel , Casas Sandra Isabel
Published: October 2021

El objetivo de este trabajo consistió en el estudio de la QoS (por sus siglas en inglés) y la QoE (por sus siglas en inglés) de API (por sus siglas en inglés) de servicios web consumidos por aplicaciones mash-up móvil. El estudio se enfoca en recolectar y analizar indicadores de QoS y de QoE. La metodología usada para el desarrollo de este trabajo es experimental, puesto que se ha realizado una experiencia que permitió recolectar los datos del estudio. Para tal fin, se desarrolló un mash-up móvil que consume tres API REST (por sus siglas en inglés) y una librería que permite recolectar indicadores de QoS y de QoE. El estudio se realizó durante 60 días y se recolectaron 1.012 valores de indicadores. Los resultados obtenidos prueban que realizar un análisis parcial de QoS y de QoE que consideren indicadores de manera aislada puede llevar a conclusiones inexactas, por lo que se debe realizar un análisis y evaluación más integral, en atención a la mayor cantidad de factores que afectan la QoS y la QoE.
Electrofun: una aplicación basada en gamificación para apoyar la implementación del sistema de gestión de activos ISO 55000 en Codensa
Authors: Salazar-Zuluaga Anderson , Zapata-Madrigal Germán D. , García Sierra Rodolfo
Published: October 2021

Se presentó el desarrollo de una aplicación basada en gamificación para el apoyo en la implementación de un sistema de gestión de activos ISO 55000 en Codensa. Se muestra la aplicación Energy Assets, la cual se planteó como una estrategia para introducir los conceptos sobre sistemas de gestión de activos ISO 55000 y sobre la Resolución 15 de 2018 de la Comisión de Regulación de Energía y Gas (CREG) que da el mandato de implementación de la norma. Se presenta la metodología a partir de la cual se diseñaron los ocho niveles del juego donde se tratan los conceptos básicos sobre los sistemas de gestión de activos, el ciclo de vida de un activo y las disposiciones generales de la Resolución 15 de 2018 de la CREG. Para el desarrollo de las diferentes preguntas incluidas en cada nivel, se aplicaron múltiples estrategias, como selección única, selección múltiple, asociación de conceptos y completar definiciones. Finalmente, se destaca cómo la gamificación es una estrategia digital para apoyar el objetivo de certificación ISO 55000 de Codensa y, en general, para involucrar a sus colaboradores en proyectos de interés general.
Glimmers of hope: a global Green New Deal is feasible
Authors: Fesenfeld Lukas P.
Published: October 2021

In light of limited international climate policy efforts, many are pessimistic about effective climate change mitigation. However, there is still a chance for a global Green New Deal which would reduce both socio-economic inequalities and greenhouse gas emissions. Unfolding feedbacks
between technological, behavioral, and political changes provide an opportunity for transforming our societies. Yet, a Green New Deal in line with the green growth paradigm seems politically more feasible than a radical approach that rests upon a de-growth paradigm.
Lachesis
Authors: Zou Jia , Das Amitabh , Barhate Pratik , Iyengar Arun , Yuan Binhang , Jankov Dimitrije , Jermaine Chris
Published: October 2021

Partitioning is effective in avoiding expensive shuffling operations. However, it remains a significant challenge to automate this process for Big Data analytics workloads that extensively use user defined functions (UDFs), where sub-computations are hard to be reused for partitionings compared to relational applications. In addition, functional dependency that is widely utilized for partitioning selection is often unavailable in the unstructured data that is ubiquitous in UDF-centric analytics. We propose the
Lachesis
system, which represents UDF-centric workloads as workflows of analyzable and reusable sub-computations.
Lachesis
further adopts a deep reinforcement learning model to infer which sub-computations should be used to partition the underlying data. This analysis is then applied to automatically optimize the storage of the data across applications to improve the performance and users' productivity.
Tensor relational algebra for distributed machine learning system design
Authors: Yuan Binhang , Jankov Dimitrije , Zou Jia , Tang Yuxin , Bourgeois Daniel , Jermaine Chris
Published: October 2021

We consider the question: what is the abstraction that should be implemented by the computational engine of a machine learning system? Current machine learning systems typically push whole tensors through a series of compute kernels such as matrix multiplications or activation functions, where each kernel runs on an AI accelerator (ASIC) such as a GPU. This implementation abstraction provides little built-in support for ML systems to scale past a single machine, or for handling large models with matrices or tensors that do not easily fit into the RAM of an ASIC. In this paper, we present an alternative implementation abstraction called the
tensor relational algebra
(TRA). The TRA is a set-based algebra based on the relational algebra. Expressions in the TRA operate over binary tensor relations, where keys are multi-dimensional arrays and values are tensors. The TRA is easily executed with high efficiency in a parallel or distributed environment, and amenable to automatic optimization. Our empirical study shows that the optimized TRA-based back-end can significantly outperform alternatives for running ML workflows in distributed clusters.
Parallel discrepancy detection and incremental detection
Authors: Fan Wenfei , Tian Chao , Wang Yanghao , Yin Qiang
Published: October 2021

This paper studies how to catch duplicates, mismatches and conflicts in the same process. We adopt a class of entity enhancing rules that embed machine learning predicates, unify entity resolution and conflict resolution, and are collectively defined across multiple relations. We detect discrepancies as violations of such rules. We establish the complexity of discrepancy detection and incremental detection problems with the rules; they are both NP-complete and W[1]-hard. To cope with the intractability and scale with large datasets, we develop parallel algorithms and parallel incremental algorithms for discrepancy detection. We show that both algorithms are parallelly scalable,
i.e.
, they guarantee to reduce runtime when more processors are used. Moreover, the parallel incremental algorithm is relatively bounded. The complexity bounds and algorithms carry over to denial constraints, a special case of the entity enhancing rules. Using real-life and synthetic datasets, we experimentally verify the effectiveness, scalability and efficiency of the algorithms.
Well-Posedness and Uniform Decay Rates for a Nonlinear Damped Schrödinger-Type Equation
Authors: Cavalcanti Marcelo M. , Domingos Cavalcanti Valéria N.
Published: October 2021

In this paper we study the existence as well as uniform decay rates of the energy associated with the nonlinear damped Schrödinger equation,

i
⁢

u
t

+

Δ
⁢
u

+

|
u
|

α

⁢
u

-

g
⁢

(

u
t

)

=

0
 

in 
⁢
Ω

×

(
0
,
∞
)

,

iu_{t}+\Delta u+|u|^{\alpha}u-g(u_{t})=0\quad\text{in }\Omega\times(0,\infty),

subject to Dirichlet boundary conditions, where

Ω
⊂

ℝ
n

{\Omega\subset\mathbb{R}^{n}}

,

n
≤
3

{n\leq 3}

, is a bounded domain with smooth boundary

∂
⁡
Ω

=
Γ

{\partial\Omega=\Gamma}

and

α
=

2
,
3

{\alpha=2,3}

. Our goal is to consider a different approach than the one used in [B. Dehman, P. Gérard and G. Lebeau, Stabilization and control for the nonlinear Schrödinger equation on a compact surface, Math. Z. 254 2006, 4, 729–749], so instead than using the properties of pseudo-differential operators introduced by cited authors, we consider a nonlinear damping, so that we remark that no growth assumptions on

g
⁢

(
z
)

{g(z)}

are made near the origin.
Nations in A Showcase: A Comparative Perspective on the Italian National Jubilee (1961) and the Meiji Centennial (1968)
Authors: Lanna Noemi
Published: October 2021

In 1961, Italy celebrated the hundredth anniversary of its unification. A wide range of initiatives commemorated the centennial, highlighting the glorious deeds of the Risorgimento and their long-term, positive legacy. Seven years later, Japan embarked on a similar task with the celebration of the hundredth anniversary of the Meiji Restoration (1868). Like the Italian National Jubilee, the Japanese one praised the country’s achievements, presenting Meiji Restoration as a successful transformation unmatched in world history. Although there is literature about the Italian and Japanese centennials, there has been no attempt to comparatively analyse them. Yet, the two jubilees reveal interesting similarities that deserve further attention. In both cases, the official commemorative agenda proposed a self-congratulatory narrative linking the ideal starting point of modernization – Risorgimento/Meiji Restoration – to the arrival point, namely the economic “miracles” that the two countries were experiencing. Both in Italy and in Japan, the anniversaries posed crucial questions concerning the historical assessment of the totalitarian regimes. Finally, in both cases the celebrations were the subject of intense domestic debates. Through an investigation of carefully selected first-hand sources in Italian and Japanese, the paper will make a comparative analysis of the Italian National Jubilee and the Meiji Centennial in order to gain theoretical insights on the way the parties in power used history to build national identity.
Are Temporary or Permanent Income Payments Better Placed to Boost Demand during Covid-19?
Authors: Prabhakar Rajiv
Published: October 2021

Covid-19 has sparked calls for a universal basic income as a way of coping with a demand shock caused by the pandemic. Temporary income payments have been part of the emergency response to the pandemic. This paper questions the effectiveness of temporary payments as a way to raise demand. Some observers claim that vouchers are better targeted at sectors hit hard by Covid-19 as people may have a tendency to save than spend from temporary payments. There may be a stronger case for permanent rather than temporary payments if the aim is to boost demand in the economy.
Emotions in climate change communication: An experimental investigation
Authors: Arikan Gizem , Melek Gizem , Gunay Defne
Published: October 2021

We conducted an experiment to test whether altering the saliency of information provided by experts in fictitious news stories on climate change triggered different emotions among readers. Based on appraisal theories of emotions in the psychology literature, we hypothesized that 1) news stories that presented climate change related threats as diffuse and uncertain would elicit greater levels of anxiety, while 2) stories that provided a specific target to blame would induce greater anger, and 3) those that underlined the potential of technology and human efforts to solve climate change related issues would elicit greater levels of hope. We found that while all news stories concerning climate change elicited high levels of anxiety, there were statistically significant differences between the emotions expressed by participations in the expected directions. We discuss the potential implications of these findings for climate change communication and for public opinion on climate change.
Linear Fractional Galton–Watson Processes in Random Environment and Perpetuities
Authors: Alsmeyer Gerold
Published: October 2021

Linear fractional Galton–Watson branching processes in i.i.d. random environment are, on the quenched level, intimately connected to random difference equations by the evolution of the random parameters of their linear fractional marginals.
On the other hand, any random difference equation defines an autoregressive Markov chain (a random affine recursion) which can be positive recurrent, null recurrent and transient and which, as the forward iterations of an iterated function system, has an a.s. convergent counterpart in the positive recurrent case given by the corresponding backward iterations.
The present expository article aims to provide an explicit view at how these aspects of random difference equations and their stationary limits, called perpetuities, enter into the results and the analysis, especially in quenched regime.
Although most of the results presented here are known, we hope that the offered perspective will be welcomed by some readers.
Ground plane and selective buried oxide based planar junctionless transistor
Authors: Murshid Asim M. , Bashir Faisal
Published: October 2021

In this work, we demonstrate a ground plane (GP) based Selective Buried Oxide (SELBOX) Junctionless Transistor (JLT), named as GP-SELBOX-JLT. The use of GP and SELBOX in the proposed device reduces the electric field and enhances volume depletion in the channel, hence improvesION/IOFFratio and scalability. Using calibrated 2-D simulation, we have shown that proposed device exhibits better Short Channel Effect (SHE) immunity as compared to SOI-JLT. Therefore, the proposed GP-SELBOX-JLT can be scaled without degrading the performance in sub 20 nm regime. In addition, the ac study has shown that the cutoff frequency (fT) of GP-SELBOX-JLT is almost equal to conventional SOI-JLT.
On the asymptotic formulas for perturbations in the eigenvalues of the Stokes equations due to the presence of small deformable inclusions
Authors: Khelifi Abdessatar , Jaouabi Ahlem
Published: October 2021

In this paper, we provide a rigorous derivation of an asymptotic formula for the perturbation of eigenvalues associated to the Stokes eigenvalue problem with Dirichlet conditions and in the presence of small deformable inclusions. Taking advantage of the small sizes of the inclusions immersed in an incompressible Newtonian fluid having kinematic viscosity different from the background one, we show that our asymptotic formula can be expressed in terms of the eigenvalue in the absence of the inclusions and in terms of the viscous moment tensor (VMT).
A 120 Mbps WDM-based VLC system for implementation of Internet of Things
Authors: Boobhalon Vasudevan , Vijayam Kishore , Charan Karasala Vendata Sai
Published: October 2021

It is envisioned that by 2022, the number of Internet of Things (IoT) devices will be more than 20 billion. The transfer of information between IoT devices is heavily dependent on wireless links based on the radio frequency (RF) spectrum. Due to the scarcity of limited and licensed RF spectrum, visible light communication (VLC) based IoT links can be considered as a promising and viable solution. In this work, four channels are multiplexed to carry low-datarate information over a VLC link using cost-effective and easy to implement on-off-keying (OOK). Red, blue, green, and amber light-emitting diodes (LEDs) are deployed for parallel data transportation. The proposed system has been designed and simulated using Optisystem software. Through numerical simulations, we investigate the bit error rate (BER) performance of the proposed VLC link with increasing transmission range. Also, we investigate the BER performance of the proposed VLC link under the impact of increasing detection surface area, responsivity of the photodiode, and slope efficiency of the LEDs. Further, the performance of the proposed VLC link has been compared for different data transmission rates using non-return-to-zero and return-to-zero modulation schemes.
Newly defined peroxisomal disease with novel ACBD5 mutation
Authors: Gorukmez Ozlem , Havalı Cengiz , Gorukmez Orhan , Dorum Sevil
Published: October 2021

Peroxisomal disorders are a heterogeneous group of diseases caused by mutations in a large number of genes. One of the genetic disorders known to cause this situation is ACBD5 (Acyl-CoA binding-domain-containing-5) gene mutations that have been described in recent years. Here, we report two siblings with a novel homozygous nonsense variation (c.1297C>T, p.Arg433*) in ACBD5 (NM_145698.4) gene using Clinical Exome Sequencing (Sophia Genetics).
Differences in Ethical Cyber Behavioural Intention of Nigerian and South African Students: A Multi-Group Analysis Based on the Theory of Planned Behaviour
Authors: Aderibigbe Nurudeen , Ocholla Dennis , Britz Johannes
Published: October 2021

Cybertechnology has become a fundamental part of educational institutions, with the student’s routine to use these technologies to communicate, learn and play, causing a need for understanding the impact and general principles of ethical computer use in academia. However, the practice of cyberethics in these environments has presented many challenges for the institutions. This study, based on the theory of planned behaviour, examined the differences in ethical cyber behavioural intention of Nigerian and South African students using a multi-group analysis. The study adopted a survey research design– structured questionnaires were randomly distributed among students of two purposively selected universities, one in South Africa and the other Nigeria. Structural equation modelling was employed to test the proposed model fit. Overall, 450 undergraduate students participated in the survey; 343 respondents completed and returned the questionnaire, resulting in a response rate of 76.2%. The subjective norm was found to be statistically significant in influencing students’ ethical cyber behavioural intention with cyber technologies. The study contributes to the extant literature on the application of the Theory of Planned Behaviour (TPB). The originality and value of this study can be viewed from the application of a socio-psychology theory to determine ethical cyber behavioural intention in relation to cybertechnology, which provides further evidence that the TPB can be applied to cyberethics research. Moreover, to the best of authors’ knowledge, this is a pioneer study that comprehensively examines the linkage of components of TPB with ethical cyber behavioural intention in joint samples from South Africa and Nigeria.
New targets of morphine postconditioning protection of the myocardium in ischemia/reperfusion injury: Involvement of HSP90/Akt and C5a/NF-κB
Authors: Tu Rong-Hui , Wang Dong-Xiao , Zhong Guo-Qiang , Meng Jian-Jun , Wen Hong , Jie-Feng  , Bi Qi , He Yan
Published: October 2021

Background

Activation of the complement component 5a (C5a) and nuclear factor κB (NF-κB) signaling is an important feature of myocardial ischemia/reperfusion (I/R) injury and recent studies show that morphine postconditioning (MP) attenuates the myocardial injury. However, the mediating cardioprotective mechanisms remain unclear. The present study explores the role and interaction of heat shock protein 90 (HSP90), Akt, C5a, and NF-κB in MP-induced cardioprotection.

Methods

Male Sprague Dawley rats (n = 160) were randomized into eight groups (n = 20 per group). Rats in the sham group underwent thoracotomy, passing the ligature through the heart but without tying it (150 min), and the other seven groups were subjected to 30 min of anterior descending coronary artery occlusion followed by 2 h of reperfusion and the following treatments: I/R (30 min of ischemia and followed by 2 h of reperfusion); ischemic postconditioning (IPostC, 30 s of ischemia altered with 30 s of reperfusion, repeated for three cycles, and followed by reperfusion for 2 h); MP (0.3 mg/kg morphine administration 10 min before reperfusion); MP combined with the HSP90 inhibitor geldanamycin (GA, 1 mg/kg); MP combined with the Akt inhibitor GSK-690693 (GSK, 20 mg/kg); and MP combined with the C5a inhibitor PMX205 (PMX, 1 mg/kg/day, administration via drinking water for 28 days) and MP combined with the NF-κB inhibitor EVP4593 (QNZ, 1 mg/kg). All inhibitors were administered 10 min before morphine and followed by 2 h reperfusion.

Results

MP significantly reduced the I/R-induced infarct size, the apoptosis, and the release of cardiac troponin I, lactate dehydrogenase (LDH), and creatine kinase-MB. These beneficial effects were accompanied by increased expression of HSP90 and p-Akt, and decreased expression of C5a, NF-κB, tumor necrosis factor α, interleukin-1β, and intercellular cell adhesion molecule 1. However, HSP90 inhibitor GA or Akt inhibitor GSK increased the expression of C5a and NF-κB and prevented MP-induced cardioprotection. Furthermore, GA inhibited the MP-induced upregulation of p-Akt, while GSK did not affect HSP90, indicating that p-Akt acts downstream of HSP90 in MP-induced cardioprotection. In addition, C5a inhibitor PMX enhanced the MP-induced downregulation of NF-κB, while NF-κB inhibitor QNZ had no effect on C5a, indicating that the C5a/NF-κB signaling pathway is involved in MP-induced cardioprotection.

Conclusion

HSP90 is critical for MP-mediated cardioprotection possibly by promoting the phosphorylation of Akt and inhibiting the activation of C5a and NF-κB signaling and the subsequent myocardial inflammation, ultimately attenuating the infarct size and cardiomyocyte apoptosis.
Spin photonics: from transverse spin to photonic skyrmions
Authors: Shi Peng , Du Luping , Yuan Xiaocong
Published: October 2021

Spin angular momentum associated with circular polarization is a fundamental and important aspect of photons both in classical and quantum optics. The interaction of this optical spin with matter and structures results in many intriguing optical effects and state-of-the-art applications covered under the emerging subject of spin optics. Distinct from longitudinal optical spin along the mean wavevector, transverse spin, the corresponding vector of which is perpendicular to the mean wavevector, prevails and plays a significant role in confined electromagnetic waves such as focused beams, guided waves, and evanescent waves. In the optical near-field, these transverse spins are generated owing to the spatial variation of the kinetic momentum of confined electromagnetic waves, where the spin and orbital angular momenta are strongly coupled, leading to many interesting topological spin structures and properties. Several reviews on optical transverse spins have been published in recent years in which their concepts and the various configurations producing them were introduced systematically. Here, we introduce in this review the underlying physics and dynamics of transverse spin and the resultant topological structures and properties such as the photonic skyrmions and merons. We term this sub-area ‘spin photonics’, its scope being to cover the design and research of spin structures in strongly confined electromagnetic fields with unique properties and applications. The concepts and framework reviewed have importance in optics, topological photonics, metrology, and quantum technologies and may be used to extend spin-dynamics concepts to fluidic, acoustic, and gravitational waves.
Reconfigurable nonlinear response of dielectric and semiconductor metasurfaces
Authors: Carletti Luca , Gandolfi Marco , Rocco Davide , Tognazzi Andrea , de Ceglia Domenico , Vincenti Maria Antonietta , De Angelis Costantino
Published: October 2021

Optically resonant dielectric and semiconductor metasurfaces are an emerging and promising area of nanophotonics and light–matter interaction at the nanoscale. Recently, active tuning of the linear response and nonlinear effects of these components has received an increasing amount of interest. However, so far these research directions have remained separated with only few sporadic works that study their combination beginning to appear in the literature. The evolution of nonlinear metasurfaces based on dielectric and semiconductor materials toward reconfigurable and dynamic components could potentially answer the demand of integrated on-chip components that realize essential functionalities such as frequency conversion, active switching, optical isolation, and all-optical routing. This review provides an overview of recent investigations in this field, reviews the main physical phenomena enabling the dynamic control of the nonlinear response and compares the temporal dynamics of the diverse approaches that have been explored so far. Finally, future directions of dynamic nonlinear metasurfaces are outlined.
Multiple excitons dynamics of lead halide perovskite
Authors: Gao Wanxiao , Ding Jie , Bai Zhenxu , Qi Yaoyao , Wang Yulei , Lv Zhiwei
Published: October 2021

The lead halide perovskite material shows its unique photoelectric properties, the resulting conversion efficiency of perovskite solar cells. However, the efficiency comes to a bottleneck owing to that mechanism research fall behind the device research. Multiple excitons dynamics play an important role, especially in the lifetime and binding energy of multiple excitons. A long multiexciton lifetime is beneficial to the application for light-emitting devices and photovoltaic devices. Large multiexciton binding energy means a large Stokes shift in exciton absorption, thus avoiding the loss of linear absorption. To conclude, discussions are presented regarding views of current multiple excitons research in terms of the biexciton lifetime and biexciton binding energy that should be considered for further advances in materials and devices.
Electrolytic production and characterization of nickel–rhenium alloy coatings
Authors: Niedbała Jolanta , Popczyk Magdalena , Kopyto Dorota , Swinarew Andrzej Szymon , Matuła Izabela
Published: October 2021

Electrolytic Ni–Re alloy coatings were obtained in galvanostatic conditions from nickel–rhenium baths with different contents of ammonium rhenate(vii) (0.5, 1.25, 2.5 and 5 g·L−1). The surface morphology, chemical, and phase composition of the obtained materials were determined. The coatings’ corrosion resistance tests were carried out in a 5% NaCl solution. Based on the tests, it was found that the highest corrosion resistance characterizes the coating with the highest rhenium content (37%). This material can be recommended for practical use as a protective coating. The density of the deposited Ni–37Re alloy was determined, and its specific surface area was assessed. The melting point, hardness, and electrical conductivity were also determined.
Recent development in graphene-reinforced aluminium matrix composite: A review
Authors: Md Ali Afifah , Omar Mohd Zaidi , Hashim Hanizam , Salleh Mohd Shukor , Mohamed Intan Fadhlina
Published: October 2021

Considerable attention has been given to graphene as a reinforcement material for metal matrix composite (MMC) because of its great potential for use in the automotive and aerospace industry. In general, the difficulty in achieving optimally improved properties can be attributed to poor wettability, agglomerations, and non-uniform distribution of reinforcement in the MMCs. Therefore, in terms of structural integrity, interfacial bonding, and its strengthening mechanism are important to achieve a high performance composite, which makes it imperative to discuss the integration of graphene into the alloy. The reinforcement mechanism of graphene-reinforced aluminium alloy has been evaluated in a limited number of studies, and this article examines current publications in this area. This article outlines three key topics related to the key challenges of graphene as a reinforcement material, the strengthening mechanism of graphene in a metal matrix, and the factors limiting the properties enhancement. Lastly, future works and recommendations addressed are summarized. The review presented aims to benefit to a wide range of industries and researchers and serve as a resource for future scholars.
Effect of scan speed on grain and microstructural morphology for laser additive manufacturing of 304 stainless steel
Authors: Chai Rongxia , Zhang Yapu , Zhong Bin , Zhang Chuanwei
Published: October 2021

The laser scanning parameters used in laser additive manufacturing (LAM) can impact the growth direction of the columnar grains produced during rapid solidification. This growth direction affects the mechanical properties of the manufactured parts after cladding. The effective use of a high laser power and a rapid scanning speed for LAM requires an accurate analysis of the relationships between the laser scanning process parameters and the grain growth direction and microstructural morphology of the scanned material. An experimental study was conducted to determine the macromorphology, microstructural morphology, and grain growth direction of 304 stainless steel material obtained during the laser scanning process at different scan speeds. The impact of the scan speed on different regions in the cladding layer (the clad zone (CZ), the heat affected zone (HAZ), and the dilution zone (DZ)) was determined, as well as on the direction of grain growth, the grain morphology and the grain size (which are the microstructures of the cladded materials), the degree of elemental mixing during laser scanning (which are changes in material composition of cladded material), and the microscopic hardness of the CZ (which is one of the mechanical properties of cladded material). With increasing scan speed, the CZ, HAZ, DZ, and dilution rate (DR) of the material gradually decreased, and grain growth gradually oriented towards the building direction of the cladding layer. At a 16 mm·s−1 scan speed, the angle between the grain growth direction and the scan direction was 84°. Changing the scan speed from 4 to 16 mm·s−1 caused the columnar grain size to gradually decrease from 13.3 to 9.2 μm and the corresponding microhardness to gradually increase.