bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fingerprint Based Approach For Examination Clearance in Higher Institutions
Authors: Saheed Yakub K , Hambali Moshood A , Adeniji Ismaeel A , Kadri Akeem F 
Published: June 2020

Biometric techniques have become a prominent option and secured means of authentication capable of sustaining the emerging ubiquitous computing. The process for allowing students to sit for an examination has been through the presentation of medium of identification such as ID cards, library cards, fees clearance cards, photo cards, etc. This method of authenticating a student for an examination has an obvious problem such as presentation of fake clearance card, impersonation and so on. The unethical manner associated with the examination is a grim issue that require the stakeholders in academic area to seek for alternative means of authenticating student for examination because, the manual paper-based clearance process is fundamentally flawed. This paper addressed all the aforementioned shortcomings and revealed the effectiveness of biometric system using fingerprint for examination clearance. The proposed examination clearance system used fingerprint identification. In identification, the system recognizes an individual by comparing his/her biometrics with every record in the database.
The Effect of Workers Health on Production in Some Selected Quarries in Southwestern Nigeria
Authors: Melodi Mbuyi M 
Published: June 2020

The study examined the effect of workers' health on production in some selected quarries in Ondo State, Nigeria. It focuses at accessing the state of labour productivity in quarry operation, the current state of workers' health and identifying the health management facilities available at quarry sites of the study area. Five quarry firms were purposively selected for their high workers enrolment in Ondo State while 14 quarry workers were randomly selected from each quarry; thereby summing up to 70 respondents. Data was collected by means of structured questionnaire to provide information on respondents' personal information, quarry operational activities, availability of health facilities, frequency of clinic visit, and quarry tonnage turn over. Frequency and percentage frequency statistics were the main descriptive statistical tools utilized. While the inferential statistics used are independent sample T -test and Pearson correlation analysis. An analysis of the results established that the quarry workers were mostly males (88.6%) of average age between 20 to 25 years (40.0%); only 6% have a working experience of over 11 years; 32 % have the first degree, the rest have lower certificates; 63% were unmarried. About 80% of the respondents were provided with personal protective equipments and access to first aid facilities. 75.5% attested that quarry companies were working in alliance with health and safety standard (while workers are mostly on 2 shifts (62.9%) per day. About 13% attested that they have been to clinic twice at the year of this study. Prevalence of ailments among the quarry workers included: head ache (91.4%), malaria (90.0%), catarrh (91.4%), vibration effect (44.3%), dehydration (42.9%), snake and insect bites (31.4%), Silicosis (11.4%) and lung diseases (10%). Monthly tonnage of quarry related strongly (R=0.976) with workers’ population. However, current level of medical facilities had very low correlation with productivity (-0.256). It is recommended that the quarry companies invest in workers’ health services to care for health condition of workers, which in turn have a great and significant implication on daily productivity of each worker.
Overpricing persistence in experimental asset markets with intrinsic uncertainty
Authors: Sornette Didier , Andraszewicz Sandra , Wu Ke , Murphy Ryan O. , Rindler Philipp , Sanadgol Dorsa 
Published: June 2020

Abstract
To study coordination in complex social systems such as financial markets, the authors introduce a new prediction market set-up that accounts for fundamental uncertainty. Nonetheless, the market is designed so that its total value is known, and thus its rationality can be evaluated. In two experiments, the authors observe that quick consensus emerges early yielding pronounced mispricing, which however does not show the standard “bubble-and-crash”. The set-up is implemented within the xYotta collaborative platform (https://xyotta.com). xYotta’s functionality offers a large number of extensions of various complexity such as running several parallel markets with the same or different users, as well as collaborative project development in which projects undergo the equivalent of an IPO (initial public offering) and whose subsequent trading matches the role of financial markets in determining value. xYotta is thus offered to researchers as an open source software for the broad investigation of complex systems with human participants.
Mass spectral characterization of primary emissions and implications in source apportionment of organic aerosol
Authors: Xu Weiqi , He Yao , Qiu Yanmei , Chen Chun , Xie Conghui , Lei Lu , Li Zhijie , Sun Jiaxing , Li Junyao , Fu Pingqing , Wang Zifa , Worsnop Douglas R. , Sun Yele 
Published: June 2020

Abstract. Source apportionment of organic aerosol (OA) from aerosol mass spectrometer (AMS) or aerosol chemical speciation monitor (ACSM)
measurements relies largely upon mass spectral profiles from different source emissions. However, the changes in mass spectra of primary emissions
from AMS–ACSM with the newly developed capture vaporizer (CV) are poorly understood. Here we conducted 21 cooking, crop straw, wood, and coal
burning experiments to characterize the mass spectral features of OA and water-soluble OA (WSOA) using SV-AMS and CV-ACSM. Our results show overall
similar spectral characteristics between SV-AMS and CV-ACSM for different primary emissions despite additional thermal decomposition in CV, and the
previous spectral features for diagnostics of primary OA factors are generally well retained. However, the mass spectral differences between OA and
WSOA can be substantial for both SV-AMS and CV-ACSM. The changes in f55 (fraction of m∕z 55 in OA) vs. f57, f44
vs. f60, and f44 vs. f43 in CV-ACSM are also observed, yet the evolving trends are similar to those of SV-AMS. By applying the source
spectral profiles to a winter CV-ACSM study at a highly polluted rural site in the North China Plain, the source apportionment of primary OA was much
improved, highlighting the two most important primary sources of biomass burning and coal combustion (32 % and 21 %). Considering the rapidly
increasing deployments of CV-ACSM and WSOA studies worldwide, the mass spectral characterization has significant implications by providing essential
constraints for more accurate source apportionment and making better strategies for air pollution control in regions with diverse primary emissions.
The importance of input data quality and quantity in climate field reconstructions – results from the assimilation of various tree-ring collections
Authors: Franke Jörg , Valler Veronika , Brönnimann Stefan , Neukom Raphael , Jaume-Santero Fernando 
Published: June 2020

Abstract. Differences between paleoclimatic reconstructions are caused by two
factors: the method and the input data. While many studies compare
methods, we will focus in this study on the consequences of the
input data choice in a state-of-the-art Kalman-filter paleoclimate data
assimilation approach. We evaluate reconstruction quality in the
20th century based on three collections of tree-ring records: (1)
54 of the best temperature-sensitive tree-ring chronologies chosen
by experts; (2) 415 temperature-sensitive tree-ring records chosen
less strictly by regional working groups and statistical screening;
(3) 2287 tree-ring series that are not screened for climate
sensitivity. The three data sets cover the range from small sample
size, small spatial coverage and strict screening for temperature
sensitivity to large sample size and spatial coverage but no
screening. Additionally, we explore a combination of these data sets
plus screening methods to improve the reconstruction quality. A large, unscreened collection generally leads to a poor
reconstruction skill. A small expert selection of extratropical
Northern Hemisphere records allows for a skillful high-latitude
temperature reconstruction but cannot be expected to provide
information for other regions and other variables. We achieve the
best reconstruction skill across all variables and regions by
combining all available input data but rejecting records with
insignificant climatic information (p value of regression model >0.05) and removing duplicate records. It is important to use
a tree-ring proxy system model that includes both major growth
limitations, temperature and moisture.
Assessment of Bacterial Activities within Shipwrecks along Iwafe Estuary of New Calabar River in Rivers State
Authors: Olukole Chidinma G. Daokoru- , Ohimain Elijah I. , Tatfeng Youtchou M. 
Published: June 2020

Qualitative assessment of bacterial activities within shipwrecks along Iwafe estuary of New Calabar River was studied. The study was aimed at identifying the various bacterial communities present in a shipwreck ecosystem in an estuary located in the Niger Delta. Water, sediment and rusticle samples were collected aseptically from three shipwrecks submerged in the river and were subjected to Biological Activity Reaction Test (BARTS) to investigate the different bacterial activities within the shipwrecks. Three bacterial communities were identified, Heterotrophic Active Bacteria, (HAB), Iron Reducing Bacteria, (IRB) and the Sulphate Reducing Bacteria, (SRB). In less than 24hrs after incubation the HAB test for all the samples showed complete aerobic activity producing a predicted population of 5.4X106 Pac/ml for water, 5.4X106 Pac/g for sediments and rusticles. The days of delay (dd) revealed the presence of SRB in the sediment and rusticle samples only. Shipwrecks ecosystem in New Calabar Estuary showed bacterial involvement, in corrosion processes even in shallow water ecosystem.
Vivência de gestação gemelar associada a Lúpus Eritematoso Sistêmico-LES
Authors: Ribeiro Lidia Cristina Villela , Miranda Erica De Jesus , Guerreiro Marcos Lázaro Da Silva 
Published: June 2020

<p><strong>Introdução: </strong>Ainda existem muitas controvérsias sobre<strong> </strong>o binômio lúpus-gestação e, historicamente, se a gravidez for múltipla, torna-se preocupante, requerendo<strong> </strong>cuidados intensivos.<strong> Objetivo:</strong> Relatar uma experiência de gravidez gemelar associada ao Lúpus Eritematoso Sistêmico. <strong>Metodologia:</strong> Estudo qualitativo baseado em uma experiência gestacional utilizando entrevistas do tipo história oral de vida. Os relatos foram gravados, analisados e transcritos, garantindo a forma das narrativas. <strong>Resultados: </strong>A gravidez ocorreu após um ano do diagnóstico de Lúpus, ainda existindo sintomas e ainda em tratamento. O pré-natal ocorreu sem complicações. Percebeu-se nas narrativas, um estado de intensa satisfação com a gravidez, sem traços de estresse. O parto ocorreu por via vaginal, com 32 semanas, devido à ruptura de uma das bolsas amnióticas, sem intercorrências materno-fetais. <strong>Conclusão: </strong>Somos de opinião que a prematuridade aconteceu devido aos dois fatores de riscos envolvidos na concepção: a gemelaridade e o lúpus. O binômio lúpus-gestação pode ter sucesso independente do tipo de gravidez (múltipla ou única). Entretanto, muitas variáveis devem ser consideradas: a atividade do Lúpus e sintomatologia na concepção, o tipo de atendimento no pré-natal e o estado emocional da gestante.</p>
Comparação do ensaio de inteferon-gamma e teste cutâneo tuberculínico para diagnóstico de tuberculose latente em profissionais de saúde de um centro de referência terciária para tuberculose do Estado da Bahia
Authors: Casela Marilda 
Published: June 2020

<p><strong>Introdução:</strong> O Teste Cutâneo Tuberculínico (TCT) tem sido utilizado como diagnóstico para a Tuberculose Infecção Latente (TBIL). Os profissionais de saúde, principalmente os que trabalham com assistência a pacientes com tuberculose (TB), têm risco elevado de contrair a doença ou a TBIL. Normas de biossegurança e qualificação da equipe de trabalho são fundamentais para o controle da Tb entre os profissionais de saúde. Atualmente testes diagnósticos mais específicos para a TBIL têm sido utilizados como alternativa para o padronizado TCT, dentre eles o QuantiFERON-TB Gold (QTF<sup>®</sup>). <strong>Objetivo:</strong> Comparar e avaliar os resultados obtidos no QTF<sup>® </sup>e Teste Cutâneo Tuberculínico dos profissionais de saúde de um centro de referência terciário para Tuberculose. <strong>Métodos:</strong> O projeto foi aprovado pelo Comitê de Ética em Pesquisa da Fundação Bahiana Desenvolvimento Científico e pelo Comitê de Ética em Pesquisa da instituição hospitalar. Foi utilizado o banco de dados do setor de medicina ocupacional da instituição e os 87 voluntários que atenderam aos critérios do estudo foram categorizados e distribuídos em dois grupos: TCT negativo (&lt;5mm) e TCT positivo (&gt;5mm). Foi realizada coleta de sangue para o teste QTF<sup>®</sup>. <strong>Resultados:</strong> Dos 47 Profissionais de Saúde TCT negativo 53,2% tiveram resultado QTF negativo. Dos 40 profissionais TCT positivo, 67,5% apresentaram resultado QTF<sup>®</sup> positivo. O grau de concordância do índice kappa foi de 0,24. Conclusão: O QTF<sup>® </sup>não mostrou uma especificidade superior quando comparado ao TCT.</p><p><strong>Palavras-chave: </strong>Prevenção e controle; Tuberculose Latente; Pessoal de Saúde;Interferon-gama; Teste Tuberculínico;</p>
Avaliação do conhecimento dos cirurgiões-dentistas e do perfil da assistência bucal prestada na atenção primária à saúde das fissuras orofaciais
Authors: Monteiro Veruschka Hana Sakaki Souza , Silva Junior Wilton Magalhães da , Silva Priscilla Dutra , Almeida Igor Ferreira Borba de , Oliveira Márcio Campos 
Published: June 2020

<p class="ABNT-Texto"><strong>Introdução: </strong>a fissura orofacial pode ser definida como uma falta de fusão de determinadas estruturas da face, durante o desenvolvimento embrionário, sendo descritas como um dos defeitos de nascimento mais comuns encontrados nas populações do mundo. Sua etiologia é multifatorial, envolvendo alterações genéticas e fatores ambientais de risco no primeiro trimestre da gestação.<strong> </strong></p><p class="ABNT-Texto"><strong>Objetivos</strong>: analisar o conhecimento dos cirurgiões-dentistas sobre as fissuras e o perfil da assistência bucal prestada na atenção primária em saúde para a ocorrência de fissuras orofaciais.</p><p class="ABNT-Texto"><strong>Metodologia: </strong>estudo descritivo censitário, aplicado por meio de um questionário, que envolveu 96% dos cirurgiões-dentistas que atuam na atenção primária de uma cidade do interior da Bahia, Brasil, e investigou a experiência clínica e profissional, conhecimentos básicos sobre fissuras, experiência no atendimento aos portadores de necessidades especiais com ênfase nos portadores de fissuras e o perfil da assistência à saúde bucal prestada a esses indivíduos no município.<strong> </strong></p><p class="ABNT-Texto"><strong>Resultados:</strong> o estudo mostrou que 50% dos participantes possuem pós-graduação, 81,5% tem mais de 05 anos de formados e 60% tem pelo menos 10 anos de serviço público. Observou-se reduzido conhecimento específico sobre o tema e desinformação sobre a existência de centros multidisciplinares para atendimento especializado desse público no país e no estado.<strong> </strong></p><p class="ABNT-Texto"><strong>Conclusões:</strong> sugere-se a necessidade de se adequar o serviço de saúde para facilitar e garantir o acesso desses portadores ao atendimento integral, além de contribuir para a prevenção de novos casos.</p><p class="ABNT-Texto"> </p>
Tuning the Electrical State of 2DEG at LaVO3−KTaO3 Interface: Effect of Light and Electrostatic Gate
Authors: Goyal Saveena , Wadehra Neha , Chakraverty Suvankar 
Published: June 2020

AbstractTwo‐dimensional electron gas (2DEG) formed at the interface of perovskite oxides has drawn considerable interest due to its rich underlying physics and potential in future generation spin‐electronic devices. Electrostatic gating and light illumination are two frequently applied stimuli for such devices. In this work, electrical conductivity tuning of a recently discovered conducting interface of crystalline LaVO3 and KTaO3 (LVO−KTO) is reported through electrostatic gating as well as light illumination. Signature of significant photoconductivity as well as persistent photocurrent is observed. A giant enhancement of resistance is found to occur under light illumination when a negative electrostatic gate bias (VG > −8 V) is applied. These effects offer a possible control on carrier density of the oxide interface, which is otherwise difficult due to their huge intrinsic carrier density. Further, a protocol deploying light and gate bias in an appropriate sequence is demonstrated to use this interface as a possible optical‐switch or memory storage device.
Fullerene‐Enhanced Triboelectric Nanogenerators
Authors: Parajuli Prakash , Sharma Bipin , Behlow Herbert , Rao Apparao M. 
Published: June 2020

AbstractTriboelectric nanogenerators (TENGs) convert mechanical energy, e.g., from human motions, into electrical power. The mechanical force brings two triboelectric materials with different electron affinities into contact, resulting in a voltage that can be used to power a device. Although progress has been made in identifying high‐performance triboelectric materials (e.g., polytetrafluoroethylene, MXenes, polyethylene terephthalate (PET), graphene‐impregnated polymers, and polyimide), the search for better triboelectric materials continues in order to harvest mechanical energy efficiently. Here, it is demonstrated that the output performance of a TENG can be enhanced by coating its triboelectric material surface with an important class of carbons, viz., zero‐dimensional C60 fullerene, which is known for its high electron affinity. Specifically, a C60 fullerene‐based TENG (F‐TENG) is fabricated and evaluated that supports a high open‐circuit voltage of ≈1.6 kV, short‐circuit current of ≈100 µA, instantaneous peak power density of ≈38 W m−2, and charging of a 1 µF capacitor to 180 V under 8 min. Because of the superior power output of the F‐TENG, a digital watch can be powered continuously in real‐time, a task that cannot be performed with a similar‐sized TENG comprising PET and polyimide. Notably, a novel methodology based on the analysis of the TENG output waveforms is presented for determining the triboelectric charge, which can then be used to rank the electrode material in the tribolelectric series.
Effect of H Defects on Li Transport during the Deposition Process on an H‐Diamond Surface: A First‐Principles Calculation Analysis
Authors: Ren Yuan , Ma Xiyu , Qi Zhaohui , Yang Shenbo , Zhang Chao , Sun Shiyang , Cao Yanan , Tan Xin , Liu Xuejie 
Published: June 2020

AbstractTo explore the feasibility and rationality of a hydrogen‐terminated diamond surface film as an solid electrolyte interface (SEI) for lithium‐sulfur batteries, the adsorption and migration behavior of lithium atoms on the hydrogen‐terminated diamond surface with different amounts of hydrogen defects are determined by first‐principles calculations. Since a hydrogen deficiency in the row direction is denser than a hydrogen deficiency in the chain direction, hydrogen deficiency can drive lithium‐ion deposition. Thus, lithium atoms are more stable on the surface of hydrogen‐terminated diamonds with a hydrogen deficiency in the direction of the dimer row. The adsorption of lithium atoms on hydrogen‐terminated diamond films lacking three hydrogens is more stable due to the absence of dangling chemical bonds on the surface of the hydrogen‐terminated diamond. Therefore, lithium atoms cannot be adsorbed on an all‐H‐diamond surface. The low adsorption energy of lithium atoms on a clean diamond surface indicates that it is a simple physical adsorption. H termination increases the adsorption energy and migration activation energy of Li on the diamond surface. H termination changes the migration path of Li on the diamond surface. The atomic deposition of Li is driven by the center of the H defect region on the H‐diamond surface.
Total Synthesis of Alstofolinine A
Authors: Shanmukha Rao B. Sridhara , Kumar Amit , Sudhakar Gangarajula 
Published: June 2020

AbstractThe total synthesis of alstofolinine A (1) is accomplished from an easily accessible tetracyclic core 11 via 12. Core 11 bears all the required stereocenters along with suitable functional groups for necessary transformations facilitated in quick accessing of the target molecule 1 in minimal steps. Besides, this synthesis further supports the absolute configuration of alstofolinine A (1).
Laser Pump‐Probe Fiber‐Optic Technique for Characterization of Near‐Surface Layers of Solids: Development and Application Prospects for Studying Semiconductors and Weyl Semimetals
Authors: Starostin Alexander A. , Shangin Victor V. , Lonchakov Alexander T. , Kotov Artem N. , Bobin Semyon B. 
Published: June 2020

AbstractA fiber‐optic setup incorporating the pump‐probe thermoreflectance (TR) technique with Fabry–Perot (FP) interferometer is presented. It includes both heat pump and probe lasers, producing wavelengths of 1470 and 1530 nm, respectively, together with a reflected radiation detector. Heat pump pulse duration varies from a few microseconds to tens of microseconds. The potential of the pump‐probe TR‐FP technique to investigate the subsurface region of semiconductors with a range of electron spectra is demonstrated. A pronounced dip in time dependence of the TR‐FP signal is discovered at the liquid nitrogen temperature in the gapless semiconductor compound HgSe—a candidate for the family of Weyl semimetals with broken inversion symmetry. This finding implies the developed pulsed TR‐FP method for the detection of Weyl nodes and surface Fermi arcs in solids.
Enhancement of permittivity in P(VDF‐CTFE)/metal–organic frameworks mixed matrix membranes
Authors: Jia Qin‐Xiang , Yang Dan‐Hong , Jin Li , Zhang Zhicheng 
Published: June 2020

AbstractA novel family of mixed matrix membranes (MMMs) with the combination of ferroelectric fluropolymers matrix (P(VDF‐CTFE)) and ferroelectric MOFs fillers ([NH3(CH2)4NH3][M(HCOO)3]2(MCoII, MgII, and MnII), have been synthesized and characterized, including the morphology, structures, and dielectric properties. Dielectric measurements revealed that the permittivity of the composites improved notablely with the introduction of ferroelectric MOFs fillers, while the dielectric loss was comparable to that of the polymer matrix. And also, interestingly, the enhancement of permittivity evidently dependent on the quantity and dielectric behavior of MOFs fillers, which may be valuable to the dielectric regulation of the polymer/MOFs MMMs. In addition, two different preparation methods were adopted respectively, including blending and electrospinning‐hot pressing. The comparison of the two preparation methods revealed that the blending MMMs exhibit higher permittivity and higher dielectric loss than that of the electrospinning‐hot pressing MMMs. To our knowledge, this is a novel research of high‐εr dielectric MMMs fabricated by ferroelectric MOFs and ferroelectric fluropolymers, and this work may provide a new perspective on the further research of high‐κ dielectric MMMs and the industrial application of ferroelectric MOFs.