bluuebunny/crossref_metadata_2025_split huggingface dataset:
Variability of the Great Disk Shadow in Serpens
Authors: Pontoppidan Klaus M. , Green Joel D. , Pauly Tyler A. , Salyk Colette , DePasquale Joseph 
Published: June 2020

Abstract
We present dual-epoch Hubble Space Telescope imaging of the great disk shadow in the Serpens star-forming region. The near-infrared images show strong variability of the disk shadow, revealing dynamics of the inner disk on timescales of months. The Great Shadow is projected onto the Serpens reflection nebula by an unresolved protoplanetary disk surrounding the young intermediate-mass star SVS2/CK3/EC82. Since the shadow extends out to a distance of at least 17,000 au, corresponding to a light-travel time of 0.24 yr, the images may reveal detailed changes in the disk scale height and position angle on timescales as short as a day, corresponding to the angular resolution of the images, and up to the 1.11 yr span between two observing epochs. We present a basic retrieval of temporal changes in the disk density structure, based on the images. We find that the inner disk changes position angle on timescales of months, and that the change is not axisymmetric, suggesting the presence of a non-axisymmetric dynamical forcing on ∼1 au size scales. We consider two different scenarios, one in which a quadrupolar disk warp orbits the central star, and one in which an unequal-mass binary orbiting out of the disk plane displaces the photocenter relative to the shadowing disk. Continued space-based monitoring of the great disk shadow is required to distinguish between these scenarios, and could provide unique and detailed insight into the dynamics of inner protoplanetary disks not available through other means.
A Dual-band Radio Observation of FRB 121102 with the Deep Space Network and the Detection of Multiple Bursts
Authors: Majid Walid A. , Pearlman Aaron B. , Nimmo Kenzie , Hessels Jason W. T. , Prince Thomas A. , Naudet Charles J. , Kocz Jonathon , Horiuchi Shinji 
Published: June 2020

Abstract
The spectra of repeating fast radio bursts (FRBs) are complex and time-variable, sometimes peaking within the observing band and showing a fractional emission bandwidth of about 10%–30%. These spectral features may provide insight into the emission mechanism of repeating FRBs, or they could possibly be explained by extrinsic propagation effects in the local environment. Broadband observations can better quantify this behavior and help to distinguish between intrinsic and extrinsic effects. We present results from a simultaneous 2.25 and 8.36 GHz observation of the repeating FRB 121102 using the 70 m Deep Space Network radio telescope, DSS-43. During the 5.7 hr continuous observing session, we detected six bursts from FRB 121102, which were visible in the 2.25 GHz frequency band. However, none of these bursts were detected in the 8.36 GHz band, despite the larger bandwidth and greater sensitivity in the higher-frequency band. This effect is not explainable by Galactic scintillation and, along with previous multi-band experiments, clearly demonstrates that apparent burst activity depends strongly on the radio frequency band that is being observed.
Kinetic Scale Slow Solar Wind Turbulence in the Inner Heliosphere: Coexistence of Kinetic Alfvén Waves and Alfvén Ion Cyclotron Waves
Authors: Huang S. Y. , Zhang J. , Sahraoui F. , He J. S. , Yuan Z. G. , Andrés N. , Hadid L. Z. , Deng X. H. , Jiang K. , Yu L. , Xiong Q. Y. , Wei Y. Y. , Xu S. B. , Bale S. D. , Kasper J. C. 
Published: June 2020

Abstract
The nature of the plasma wave modes around the ion kinetic scales in highly Alfvénic slow solar wind turbulence is investigated using data from the NASA’s Parker Solar Probe taken in the inner heliosphere, at 0.18 au from the Sun. The joint distribution of the normalized reduced magnetic helicity σ
m (θ
RB, τ) is obtained, where θ
RB is the angle between the local mean magnetic field and the radial direction and τ is the temporal scale. Two populations around ion scales are identified: the first population has σ
m (θ
RB, τ) < 0 for frequencies (in the spacecraft frame) ranging from 2.1 to 26 Hz for 60° < θ
RB < 130°, corresponding to kinetic Alfvén waves (KAWs), and the second population has σ
m (θ
RB, τ) > 0 in the frequency range [1.4, 4.9] Hz for θ
RB > 150°, corresponding to Alfvén ion cyclotron waves (ACWs). This demonstrates for the first time the coexistence of KAWs and ACWs in the slow solar wind in the inner heliosphere, which contrasts with previous observations in the slow solar wind at 1 au. This discrepancy between 0.18 and 1 au could be explained either by (i) a dissipation of ACWs via cyclotron resonance during their outward journey, or by (ii) the high Alfvénicity of the slow solar wind at 0.18 au that may be favorable for the excitation of ACWs.
Le public des vidéos « ASMR »
Authors: Lenay Alice 
Published: June 2020

La recherche d’une mystérieuse sensation appelée « ASMR » donne lieu à une production de plus en plus imposante de vidéos, spécifiquement dédiées à un public qui y serait sensible. Dans ces vidéos, un guide – souvent une jeune femme – joue avec différentes matières qu’elle fait résonner, notamment en touchant directement l’appareillage technique pour faire mine de caresser le futur regardeur. L’ASMR comme phénomène socio-technique est-elle le produit d’un système économique qui désunit et fractionne les êtres en les couplant avec leurs ordinateurs plutôt qu’avec des humains, ou ouvre-t-elle la voie à une forme de résistance sur le réseau, où le corps sentant répond à la résonance concrète de la matière ?
Quel nouvel espace rituel pour le XXI e siècle ?
Authors: von Hantelmann Dorothea , Citton Yves , Deep L  
Published: June 2020

Chaque époque se caractériserait par des dispositifs rituels de rassemblement des publics qui reflètent une certaine configuration socio-politique : du rassemblement collectif de la tradition théâtrale au modèle individualisé de l’exposition dans le contexte moderne. Comment rassembler des publics face aux défis de notre siècle ?
En quête d’une morale des sexes ?
Authors: Selim Monique 
Published: June 2020

Le mot de « phallocratie » des années 1970 est remplacé par celui de « patriarcat » dans le mouvement des femmes des années 2010. Ce changement s’accompagne d’une dépolitisation du mouvement, aujourd’hui soucieux, avant tout, d’obtenir des actions gouvernementales efficaces, et ouvert à toutes les opinions politiques. Il s’ensuit une forte demande de moralisation des comportements comme en témoigne le travail de l’unité de « dépatriarcalisation » du ministère du tourisme en Bolivie.
Implementation of Corporate Social Responsibility by Oil Companies in the Niger Delta Region of Nigeria: Myth or Reality
Authors: Mbalisi Onyeka Festus , Okorie Christiana Uzoaru 
Published: June 2020

Niger Delta region of Nigeria is a home to many multinational oil companies with different packages of corporate social responsibility (CSR) because of its huge natural resource reserve especially of oil and gas. The CSR packages are designed to address social, economic and environmental concerns of the indigenes of the Niger Delta region, arising from the oil and gas operations of the multinational oil companies. The operational activities of the oil companies over the years have led to the degradation of the Niger Delta environment with consequent loss of livelihood sources, thereby triggering protests and other violent activities in the region. The paper identified and analysed the indices of the components of the CSR (social, economic and environmental components) packages using results-based management framework to determine the impacts of the CSR projects and programmes on the people. The analysis revealed that multinational oil companies release funds from a philanthropic perspective for the execution of some social development projects/programmes, but these projects/programmes do not address the welfare and livelihood needs of the people. This means that the multinational oil companies operating in the region create an illusion of compliance with social development and responsibility rules. The paper linked these unfortunate situations (environmental degradation, insecurity, poverty, unemployment, etc) found in the region today to failure of CSR implementation due to corruption, insincerity and philanthropic approach of the oil companies and regard it as injustice to the people of Niger Delta. It therefore concluded that CSR implementation in the Niger Delta region of Nigeria is a myth and as a result recommended that Multinational oil companies should therefore incorporate the people of the Niger Delta into the oil economy by enlisting household heads into the payroll system of the multinational oil companies as well as engage sincerely in projects that will lead to the development of the region, if protests and other violent activities in the region must stop.
Key Words: Implementation, Corporate social responsibility, Environmental Resources, Niger Delta, Multinational Oil Companies
A Critical Assessment of Road Infrastructural Development in Akwa-Ibom State, Nigeria
Authors: Okafor Chukwuma Onwuagana 
Published: June 2020

Road infrastructure is one of the major channels of economic development in Nigeria. This study critically examined some of the factors that affect road infrastructure development in Akwa-Ibom State, Nigeria. The study made use of primary data through the use of questionnaire shared to respondents in various professions in the state. The data was analyzed using the relative significance index (RSI). The result showed that over-dependence of road development on public financing was the major factor impacting road infrastructure in Akwa-Ibom state. Also, absence of specific ministry/agency saddled with role of road infrastructure development was the least ranked factor affecting road development in the state. The study thus recommended, among others, that there should be a holistic technical evaluation and cost assessment of road projects before its inclusion into annual budgets.
Key Words: Road, Infrastructure, economic, development, Nigeria
Status of Principals’ ICT Usage in Secondary School Administration in Rivers State
Authors: Abraham Lois Nkechi , Bariyaa John 
Published: June 2020

This study examined the status of principals’ ICT usage in secondary school administration in Rivers State. The study adopted a descriptive research design. The population of the study was 276 Principals from the 276 Senior Secondary Schools in Rivers State. A sample size of 138 was drawn using simple random sampling techniques. This represented 50% of the total population. Five research questions and five hypotheses guided the study. A self-designed questionnaire tagged “Principals’ Information and Communication Technology Usage Questionnaire (PICTUQ)”, which was a modified 2 points rating scale of YES =2 points and NO= 1 point. The data were analyzed using Mean and Standard Deviation. The criterion mean of 1.50 was used as benchmark for taking decision of each of the items of the research questions. Any score up to 1.50 and above was accepted; while score below 1.50 was rejected as not having desired impact. The z-test was used to test the hypotheses. The findings of the study revealed that both the rural and urban principals upheld the fact that there is no computer laboratory, computers, scanners, projector and power generating plants in public secondary schools in Rivers State. The study recommended that: ICT facilities should be installed in all secondary schools in Rivers State; adequate number of experts should be employed to train principals and students in ICT; adequate funds should be provided to manage the process for adequate educational quality service delivery in schools; government should set committee to install and monitor ICT facilities and its usage in public schools in Rivers State.
Key Words: ICT, Administration, ICT access, ICT application, ICT literacy, Principals’ performance.
The Dynamics of Underdevelopment in the African Novel: A Comparative Appraisal of Anglophone and Francophone Fiction
Authors: Wosu Kalu 
Published: June 2020

The post-independence era in sub-Saharan Africa is characterized by progressive underdevelopment. From the 1960s till date no meaningful development has occurred, and all known development strategies that have so far been adopted have defied all logic. Accordingly, some social scientists and scholars of development theories have come to the sad conclusion that with respect to Africa, all development theories have hit the rocks (Chambua, 1994, p, 37). The implication is that in all spheres of human endeavour, Africa south of the Sahara has failed. The leadership problem is one of the plagues that have bedevilled the West African sub region. And from the failure of leadership stems a truckload of woes: infrastructural deficit, corruption, neo-colonialist propensity, unemployment, ethnicity, educational backwardness, declining living standards, etc. This situation has left Africans disillusioned and disappointed. And African writers from the Anglophone and Francophone worlds have not relented in their condemnation of the post-independence malaise. Their oeuvre is a clear reflection of the battered landscape. Thus, in the works of Chinua Achebe, Wale Okediran, AhmadouKourouma and J.R. Essomba, the reader is led into the very soul of a continent in turmoil. These authors are selected from both sides of the linguistic divide. Whereas, Achebe and Okediran are Anglophones from Nigeria, Kourouma and Essomba are Francophones from Côte d’Ivoire and Cameroon respectively. This paper therefore attempted a diachronic investigation of the works of these authors in order to uncover the pervasive indices of underdevelopment. In other words, between Achebe and Okediran on the one hand, and between Kourouma and Essomba on the other hand, one discovers that the ills which the earlier novelists condemned in the first decade of independence have only gone from bad to worse some five decades later. The methodological approach adopted for this research work is textual analysis/ intertextuality, while privileging a socio-historical framework.
Key Words: underdevelopment, West Africa, dynamics, Achebe, Okediran, Kourouma, Essomba
Skin bleaching and women sexualisation: a discourse analysis of Fela Kuti’s Yellow Fever and Ayinla Omowura’s Oro Kan Je Mi Logun
Authors: Fadipe Israel A. 
Published: June 2020

Male music artistes have been observed to sexualise women in their songs, especially when commenting on societal problems. Employing van Dijk’s Socio-Cognitive Approach of Critical Discourse Analysis (CDA), this paper examined skin bleaching and women sexualisation in the lyrics of Fela Anikulapo-Kuti (Fela Kuti) and Ayinla Omowura. Both songs: Yellow Fever by the latter and Oro kan je mi logun (a matter concerns me) by the former were purposively selected based on popularity and thematic preoccupation, and analysed using linguistic and argumentative strategies. Findings showed persistent sexualisation of women in the songs that were meant to teach morals in the society. Therefore, this exposes the artistes as incurably prejudiced in spite of their best intention.
Keywords: Skin bleaching, Women sexualisation, Popular music, Fela Kuti, Ayinla Omowura
A congenial communication climate: the catalyst and panacea for effective organizational communication
Authors: Adeseye Bifatife Olufemi , Ariremako Innocent Afolabi 
Published: June 2020

The spirit of positive relationships should be the sine qua non to communication climate. Social scientists use the term communication climate to describe the quality of personal relationships in an organization. Do people feel respected? Do they trust one another? Do they believe that they are appreciated? The weather metaphor suggested by the term ‘climate’ is apt. Your own experience shows that the mood of a workplace can be described as sunny and calm, cold and stormy, or in similar terms, organizations create an overall climate, which can be healthy or polluted, but within that environment, individual relationships have their own micro climate. For instance, your interactions with one colleague might be described as icy, while you and another person enjoy a warm or cordial relationship. There is no question that communication climate is a key factor in job satisfaction and commitment to the organization. For this reason, communicators need to understand how to create positive climates. This article focuses on how to develop and improve the personal communication skills that are critical to the well being and successes of individuals and corporate organisations. The study adopts trait theory of leadership as its framework. It describes the necessary and proactive ingredients that foster a positive communication climate between people. It goes on to offer pertinent pieces of advice about how to communicate in a variety of person-to-person-situations; leadership styles, congenial climate and emotional intelligence.
Keywords: Communication climate, Informal networks, Emotional intelligence, Leadership styles, Organizational communication
Geospatial data and artificial intelligence technologies as innovative communication tools for quality education and lifelong learning
Authors: Onwubere Chidinma Henrietta 
Published: June 2020

The uniqueness of open and distance learning (ODL) lies in its wide reach to a large audience simultaneously in different locations. No better system than geospatial data and artificial intelligence technologies (GDAITs) can achieve this. Globally, the current trend is to use GDAITs to improve the quality of life and productivity. Education is important for any country’s economy as it enhances the overall life expectancy. Application of GDAITs in educational sector, through broadcast digitization, publishing technologies will record greater achievements in the standard of learning and the literacy of populations. At certain ages in life, people develop apathy towards learning, thus, they are cut off from additional education that could provide them with lifelong learning. With GDAITs, they can be reached with quality education anywhere. Students have constraints of time, space, and finance, for acquisition of study materials. GDAITs are able to create and deploy seamless applications which can collapse these constraints and improve the learning curves of learners. This study investigates the exposure of youths to GDAITs and the influence on their learning patterns. Gerbner’s cultivation theory serves as the theoretical framework. A survey of 200 undergraduate Nigerian students was conducted, using random sampling technique. Findings show that Nigerian youths are highly exposed to GDAITs. THw paper concludes that GDAITs contribute positively and negatively to development in diverse human activities. However, it is highly effective in fostering communication education and research in Nigeria. It recommended that information and communication technology should be taught at all levels of education, so that Nigerians can develop critical minds to distinguish what GDAITs can and cannot do. Media houses should continue to establish platforms to check fake news emanating from social media. Also, attention needs to be focused on media content to ensure that there are enough programmes that would enhance communication education in Nigeria, without fake news parasitism.
Keywords: GDAITs, Communication education, Learning processes, Social media, Digitization
Evaluating Safety Practices Associated With Use of Household Pesticides: An Interventional Study in Kurmin Mashi Rural Community, Kaduna, Nigeria
Authors: Adje U.D. , Aremu T.O. 
Published: June 2020

Many households in developing countries routinely use pesticides without any safety considerations. The objective of this study was to determine types of pesticides and pesticide-use practices of the residents, to determine self-reported adverse effects resulting from pesticide use and to assess the impact of educational intervention on pesticide use behavior in the study area. Commercially available pesticide samples were collected from pesticide vendors in the area. Pre -tested questionnaires were distributed to 375 family heads. Data was expressed as frequency and percentages.Educational intervention on safe pesticide use was carried out. Pre and post intervention behavior were compared using paired t test. Relationship between demographic variables and pesticide use practices were explored using Chi Square statistics. A p value of less than 0.05 was considered significant. Prevalent pests were mosquitoes, cockroaches, rats, bedbugs, ants, termites, houseflies, ticks and scorpion. The major constituent of pesticides in this environment was Dichlorvos (DDVP). Many commercially available pesticides were unlabeled. Nearly half, 48.8% had used pesticides in the home. More than three quarters, 78.7% indicated that they read instructions before using pesticides. More than one third, 36% had experienced health problems attributed to pesticide use. Many locally available pesticides were unlabeled. Majority of labelled pesticides contained mainly Diclorvos (DDPV). Unsafe pesticide handling practices were common. The most common self -reported adverse effect was respiratory symptoms. Educational intervention increased in the proportion of respondents that used of non-chemical methods and adopted safer pesticide use practices.
Keywords: Pesticides, Diclorvos (DDPV), Educational Intervention, Pharmacist, Nigeria
Comparative Study of Response Surface Methodology and Artificial Neural Network for Modeling and Optimization of Extraction Process Parameters on <I>Tetrapleura Tetraptera</I>
Authors: Oyedoh E.A. , Erumi G.A. , Akhabue C.E. 
Published: June 2020

Bioactive compounds in the fruits of Tetrapleura tetraptera is widely used in food as a flavouring agent and for spices. In this study, bioactive compounds were extracted by solid-liquid extraction process and the yield was optimized by response surface methodology (RSM) and artificial neural network (ANN). The process parameters optimized were the extraction temperature, particle size and extraction time. Box-Behnken Design was used to study the effect of the process parameters on the extract yield. A quadratic model was obtained by RSM which was used topredict the extract yield. While for ANN, Bayesian Regularization learning algorithm with hyperbolic function (Tanh) for both hidden and output layers was the best model for predicting the extract yield. The performance of both models was established based on their R2 and RMSE values. (R2 and RMSE values were 0.9391 and 3.10 for RSM and 0.9637 and 0.8193 for ANN respectively). ANN gave the maximum extract yield of 29.15 % higher than that of RSM which evaluated a yield of 27.70 % with optimum conditions at extraction temperature of 90℃, particle size of 3.26 mm and extraction time of 50 mins. It was therefore concluded that ANN is better than RSM in the modeling and optimization of the extraction process parameters.
Keywords: Tetrapleura tetraptera, bioactive compounds, process parameters, optimization