bluuebunny/crossref_metadata_2025_split huggingface dataset:
Self-gravitating spherically symmetric systems with Q

h
condition in chameleonic Brans–Dicke gravity
Authors: Yousaf Z. , Bhatti M. Z. , Rehman Sana 
Published: February 2023

Abstract
This paper is asserted to explore the self-gravitating spherically symmetric anisotropic fluids in Chameleonic Brans–Dicke theory as dark energy matter. The dissipative and non-dissipative cases for the evolution of the system are discussed evidently satisfying the quasi-homologous condition with vanishing complexity (Y

TF
) factor, which is identified in the trace free part of the electric Riemann tensor in splitting of the curvature tensor. We formulate different equations through conformal tensor, mass function, shear stress tensor, scalar field to govern self-gravitating systems. A few models describe center filled fluid distribution whereas some of them have cavities surrounding the center by means of matching conditions on the boundary as well as on inner surfaces. The temperature of the respective models is also discussed here. Finally, we conclude the work by comparing it with GR.
Cortical Patterns Shift from Sequence Feature Separation during Planning to Integration during Motor Execution
Authors: Yewbrey Rhys , Mantziara Myrto , Kornysheva Katja 
Published: February 2023

Performing sequences of movements from memory and adapting them to changing task demands is a hallmark of skilled human behavior, from handwriting to playing a musical instrument. Prior studies showed a fine-grained tuning of cortical primary motor, premotor, and parietal regions to motor sequences: from the low-level specification of individual movements to high-level sequence features, such as sequence order and timing. However, it is not known how tuning in these regions unfolds dynamically across planning and execution. To address this, we trained 24 healthy right-handed human participants (14 females, 10 males) to produce four five-element finger press sequences with a particular finger order and timing structure in a delayed sequence production paradigm entirely from memory. Local cortical fMRI patterns during preparation and production phases were extracted from separate No-Go and Go trials, respectively, to tease out activity related to these perimovement phases. During sequence planning, premotor and parietal areas increased tuning to movement order or timing, regardless of their combinations. In contrast, patterns reflecting the unique integration of sequence features emerged in these regions during execution only, alongside timing-specific tuning in the ventral premotor, supplementary motor, and superior parietal areas. This was in line with the participants' behavioral transfer of trained timing, but not of order to new sequence feature combinations. Our findings suggest a general informational state shift from high-level feature separation to low-level feature integration within cortical regions for movement execution. Recompiling sequence features trial-by-trial during planning may enable flexible last-minute adjustment before movement initiation.SIGNIFICANCE STATEMENTMusicians and athletes can modify the timing and order of movements in a sequence trial-by-trial, allowing for a vast repertoire of flexible behaviors. How does the brain put together these high-level sequence features into an integrated whole? We found that, trial-by-trial, the control of sequence features undergoes a state shift from separation during planning to integration during execution across a network of motor-related cortical areas. These findings have implications for understanding the hierarchical control of skilled movement sequences, as well as how information in brain areas unfolds across planning and execution.
Redes transnacionales de cuidados y nuevas ciudadanías
Authors: Burgaleta Elena , Garzón-Sherdek Karen 
Published: February 2023

El fenómeno de la feminización de la migración requiere ser analizado desde múltiples perspectivas. En los últimos años se ha incrementado la presencia de las mujeres migrantes en el mercado laboral, convirtiéndose en suministradoras económicas en sus hogares y generando importantes remesas para sus países de destino. Sin embargo, este tipo de migración tiene afectaciones diferenciadas por el hecho de ser mujeres, migrantes y por los estereotipos sociales. El proceso de feminización de la migración y concretamente las cadenas transnacionales de cuidado y apoyo están generando, no sólo de redes relacionales de trabajo (formal e informal) y redefiniciones de las relaciones de género, sino también un nuevo espacio de reflexión en la (re)conceptualización de la ciudadanía, como ciudadanía universal transversalizada por el género y la cultura y desvinculada de conceptos como el territorio o la nación. En este artículo se propone una reflexión sobre las cadenas de cuidado como eje articulador de un espacio económico y especialmente político imprescindible para la reconceptualización de una ciudadanía universal, resultado de un proceso dinámico, heterogéneo e inclusivo.
Entrepreneurial Orientation as Antecedent of Business Model Innovation in Medium Enterprises in Kenya
Authors: Simiyu Albert Kisiang’ani , Ndemo Elijah Bitange , Kinoti Mary Wanjiru , Wainaina Gituro 
Published: February 2023

This study investigated the influence of entrepreneurial orientation on business model innovation in medium enterprises in Kenya. The study was grounded on the dynamic capabilities view. A descriptive cross-sectional survey research design was adopted to achieve the study’s objective. The sampling frame was the Klynveld Peat Marwick Goerdeler (KPMG) East Africa and the Nation Media Group annual Top100 companies in Kenya. Stratified random sampling was utilized to derive 221 companies that were used in the study. Primary data were collected from single respondents comprising senior managers of the participating firms. A total of 134 questionnaires were analysed. Ordinary least squares regression analysis revealed that entrepreneurial orientation positively and significantly influenced business model innovation in medium enterprises in Kenya. On the basis of the results, this study concluded that entrepreneurial orientation is necessary for enterprises to benefit from business model innovation. The study recommends that managers of medium enterprises in Kenya embrace entrepreneurial behaviour and attitude to enhance business model innovation practices. It is further recommended that policymakers should develop and implement policies that encourage innovation and entrepreneurial behaviour. The study clarifies the position of entrepreneurial orientation in relation to BMI. Additional studies are recommended.
La Violence Comme Variable Consubstantielle du Pouvoir en Afrique Postcoloniale
Authors: Amelie Hortence Angonemana Endzie Epse Mabii 
Published: February 2023

L’objectif de cet article est de mener une analyse sur la relation qui existe entre le pouvoir et la violence. Partant du principe selon lequel le pouvoir est exercé par des individus, une approche qui ne prenne pas en compte le fait que l’action humaine serait illusoire et simplement idéaliste. Cet article cherche une réponse à la question de savoir pourquoi est-ce que la violence est-elle une variable consubstantielle dans l’exercice du pouvoir en Afrique postcoloniale. En tentative de réponse à cette question, nous pouvons affirmer que la violence participe de la conquête, de l’exercice, et de la conservation du pouvoir tel que le suggère Patrick Grainville dans son roman intitulé Les Flamboyants. Pour ce faire, nous sommes arrivés à la conclusion selon laquelle pouvoir et intérêt, au cas où ils ne sont pas orientés vers les besoins des citoyens deviennent une arme fatale contre le peuple.

The objective of this article is to conduct an analysis of the relationship between power and violence. Starting from the principle that power is exercised by individuals, an approach that does not take into account the fact that human action is illusory and simply idealistic. In the context of this article we seek the answer to the question of why violence is a consubstantial variable in the exercise of power in postcolonial Africa. In an attempt to answer this question, we can affirm that violence is part of the conquest, exercise, and conservation of power as suggested by Patrick Grainville in his novel entitled Les Flamboyants. To do this, we came to the conclusion that power and interest, in case they are not oriented to the needs of the citizens, become a lethal weapon against the people.
Supplemental skeleton revision of Pseudorbitoididae M.G. Rutten, 1935 from mainly Tethyan and partly American provinces
Authors: SİREL Ercüment , DEVECİLER Ali 
Published: February 2023

The nine genera here described from the Tethyan and four genera from the American and Caribbean provinces have previously been placed within different families of Foraminifera by various authors, namely, Arnaudiella DOUVILLÉ, Sirtina BRÖNNIMANN and WIRZ, Vanderbeekia BRÖNNIMANN and WIRZ, Helicorbitoides MACGILLAVRY, Dizerina MERİÇ, Sirelella ÖZGEN-ERDEM and Cideina SİREL were shown in Lepidorbitoitidae VAUGHAN; Postorbitokathina SİREL and Orbitokathina HOTTINGER in Rotaliidae EHRENBERG; Helicolepidina TOBLER, Helicosteginopsis CAUDRI, Eulinderina BARKER and GRIMSDALE and Helicostegina BARKER and
GRIMSDALE in Lepidocyclinidae SCHEFFEN, in spite of the fact that all of them have characteristics of both rotaliid early and orbitoidal adult stages. Thus the growth stages such as rotaloid early and orbitoidal adult stages of the aforementioned genera correspond with the known family Pseudorbitoididae RUTTEN and its type genus Pseudorbitoides DOUVILLÉ. Therefore the thirteen genera found in great abundance in the Tethyan, American and Caribbean provinces have been transferred to Pseudorbitoididae RUTTEN.
Respons Kacang Nasi [Vigna umbellata (Thunb.) Ohwi & H. Ohashi] terhadap Salinitas pada Fase Perkecambahan
Authors: Putri Pratanti Haksiwi , Artari Rina , Hapsari Ratri Tri 
Published: February 2023

<p>Kacang nasi [Vigna umbellata (Thunb.) Ohwi &amp; H. Ohashi] berpotensi dikembangkan sebagai bahan pangan. Salah satu keunggulan kacang nasi adalah potensi ketahanannya terhadap cekaman kekeringan. Kondisi kekeringan umumnya berkaitan dengan cekaman abiotik lain, salah satunya adalah salinitas. Tujuan penelitian ini adalah mengevaluasi respons pertumbuhan kacang nasi terhadap salinitas pada fase perkecambahan. Konsentrasi NaCl dan genotipe kacang nasi digunakan sebagai dua perlakuan dalam rancangan acak kelompok lengkap yang diulang sebanyak 4 kali pada penelitian ini. Salinitas berpengaruh sangat nyata terhadap seluruh parameter yang diamati. Setiap genotipe menunjukkan respons yang berbeda pada setiap parameter terhadap salinitas, kecuali pada kecepatan tumbuh, panjang akar, dan jumlah akar lateral. Terdapat interaksi antara genotipe dengan konsentrasi NaCl pada parameter bobot kering akar dan tajuk kecambah kacang nasi. Genotipe G1 menunjukkan bobot kering akar dan tajuk kecambah yang tinggi pada konsentrasi 100 mM NaCl. Genotipe G1 juga memiliki keunggulan pada variabel daya berkecambah, kemunculan radikula, dan panjang hipokotil yang tinggi pada kondisi salin. Konsentrasi 100 mM NaCl cukup efektif untuk menyeleksi genotipe kacang nasi dalam jumlah besar pada fase perkecambahan. <br /><br /></p>
Experimental Study on Fiber Balls for Bridging in Fractured-Vuggy Reservoir
Authors: Chen Lifeng , Huang Feiyang , Li Gang , Mao Zhiqiang , Hu Yu , Liu Liang , Zeng Huiyong , Xu Shiyu 
Published: February 2023

Summary
For conventional particles used for conformance control in fractured-vuggy reservoirs, large-size particles easily plug the wellbore area but have difficulty plugging the zone far from the wellbore, while small-size particles easily move in depth. In this study, fiber balls for bridging in fractured-vuggy reservoirs were developed by wrapping the fiber in the precrosslinked gel. Due to the influence of temperature and salinity in the formation, the gel degraded and the filamentous fibers were released. Then, the released fibers bridged in the fractures while reducing the safety risk of the injection process. As a water plugging agent, the fiber balls can decrease the conductivity in high-permeability fractures and increase the conductivity in low-permeability fractures, thus improving waterflooding efficiency and enhancing oil recovery. The plugging performance of fiber balls was evaluated by coreflooding experiments. The experimental results show that the optimal formulation of fiber balls is 7% acrylamide (AM) + 3% polyamino acid ester + 0.75% potassium persulfate (K2S2O8) + 4% polypropylene fiber + 4% glass fiber + 0.15% polyethylene glycol diacrylate (PDA) + 0.08% N,N-dimethyl acrylamide (MBA) + 0.1% polyacrylamide (PAM). The release time of fibers from the external gel is 42 to 57 hours, meeting the requirements of conformance control. According to the results of the performance evaluation, the larger the fracture width, the worse the bridging effect of fibers. Besides, the rule of “3/2 bridging” fiber was proposed: When the fiber length is 3/2 times the fracture width, the fiber has the strongest bridging and plugging ability. With the increase in fracture width, the fiber concentration needs to be increased to have a good bridging performance. The results of this study can provide a new idea for the technology of conformance control in fractured-vuggy reservoirs.
Experienced career perspectives of nursing students and their supervisors in learning departments: A qualitative study
Authors: Boskma A.C.P. , Wolthuis F.W. , Roelofs P.D.D.M. , Wijlen A.T. van , Schie J.E. van , Rinkel J. M. de Man- van , Finnema E.J. 
Published: February 2023

Abstract
Background: Due to the nursing shortage, positive work environments are needed to retain (student) nurses. More and attractive internships for students need to be ensured. In order to provide more internship places learning departments were developed, which are characterized by a buddy system and supervisors who coaches at least two students during a shift. Gaining knowledge about career perspectives and job satisfaction is essential within the context of learning departments, as both will contribute to quality and safety of care and will support lifelong learning. The current study aimed to investigate how nurses and nursing students working and learning in learning departments experience preconditions for career opportunities.
Methods: Using a generic qualitative approach, semi-structured interviews were conducted through videocalls between March and April 2021 in the Netherlands. Inductive qualitative analysis based on ‘The Data Analysis Spiral’ was used.
Results: Career perspective is explored among six students and seven nurses. Five main themes were generated for both nurses and students; (1) personal goals; (2) skills and self-efficacy; (3) mentoring; (4) job satisfaction; and (5) career perspectives. Within the five main themes, subcategories were developed from 198 codes related to career opportunities. Results show career perspective is experienced differently. For students, the requirements to experience career perspective seem largely existing, as learning departments fits with personal goals, increases self-efficacy and provide coaching mentoring. Students felt learning departments contributed positively to becoming more skilled in working independently and collaborating with fellow students. This resulted in students feeling well prepared for the future. Nurses’ career perspectives varied from wanting more personal development to experiencing opportunities due to having great colleagues, a challenging patient category, satisfaction from sharing knowledge and a decreasing physical workload. Nurses who had affinity with coaching students experience more career perspective on learning departments.
Conclusion: Interviews provided in-depth insights within five themes. Interviews gave in-depth insight into the elements of learning departments that contribute to career perspectives of (student)nurses. The results can be used by nursing supervisors, teachers and policymakers to optimize nurses’ work environment, to eliminate leave intentions and improve quality of patientcare. The results should be taken into consideration when coaching students, developing manuals and implementing or optimizing learning departments.
Future research is recommended to investigate which tools/interventions are effective for nurses and other healthcare professionals to support career guidance.
Efficacy and safety of fire needle therapy for obstructive sleep apnea-hypopnea syndrome: study protocol for a single arm clinical trial
Authors: Shen Linbo , Zeng Hui , Song Yuqiang , Sun Sanfeng , Wang Jingfei , Sun Jingqing , Wen Yali , Zhang Yuzhuo , Fu Yuanbo 
Published: February 2023

Abstract
Background
Obstructive sleep apnea hypopnea syndrome (OSAHS) is a sleep disorder characterized by repeated apnea and hypopnea while you're asleep, and the prevalence rate increases annually. Previous research revealed that the fire needle therapy for OSAHS good clinical efficacy but lacked proof from clinical trials. Therefore, we designed this single-arm clinical trial protocol to investigate the effectiveness and safety of treating OSAHS using fire needle therapy.
Methods/design:
166 adult subjects with mild to moderate OSAHS, ranging in age from 18 to 70, will be included in this study. All subjects will receive fire needle therapy twice a week for 4 weeks and follow-up for 12 months. The following points will include outcome assessment: (1) baseline;(2) 4 weeks following treatment's start;(3) 3 months following treatment's start; (4) 12 months following treatment's start. The primary outcome of the trial is the AHI index, and the secondary outcomes include oxygen desaturation index(ODI), lowest nocturnal oxygen saturation (LSpO2), percentage of SaO2 < 90% in total sleep time (TS90%), apnea index (AI), hypopnea index (HI), subjective symptoms (by ESS score, TCM syndrome score). Safety assessments include vital sign monitoring, routine blood tests, routine urine tests, blood biochemistry, the skin Reaction Scale, the modified Vancouver scar score, and adverse events.
Discussion
This single-arm clinical registry study will provide evidence-based medical evidence for the efficacy and safety of fire needle therapy in OSAHS.
Trail registration:
Chinese Clinical Trial Registry, ChiCTR2100042309. Registered on January 7, 2021.
Optimization study of pharmaceuticals pollutants adsorption onto large surface area walnut shells activated carbon: Experimental design, Mechanism and DFT calculations
Authors: Yazid Hicham , Mersly Lekbira El , Mouchtari El Mountassir El , Kassimi Aziz El , Ayouchia Hicham Ben El , Himri Mamoune El , Rafqah Salah , Haddad Mohammadine El 
Published: February 2023

Abstract
The increasing accumulation of pharmaceuticals in aquatic ecosystems can degrade the freshwater quality and endanger human health. In our work, we will discuss the removal of three pharmaceuticals that are most detected in aquatic environments: ketoprofen (KTP), diclofenac (DCF), and sulfamethoxazole (SMX). The adsorption process removed these toxic pollutants on a bio-sourced activated carbon (AC) prepared from walnut shells (Ws) from the Atlas El Kabir -Marrakech region. MEB, elemental mapping, EDX, FTIR, and BET surface area characterized the properties of prepared activated carbon. The activated carbon obtained had a high surface area (2256 m2/g). The experimental design methodology to optimize the adsorption process using the AZURAD® software. This approach was applied to remove three pharmaceutical pollutants in an aqueous solution by AC-Ws. The effect of four independent variables, including pH, the dose of AC-Ws, and temperature (T), on the PPs elimination efficiency was studied. Using the desirability function approach, commonly optimized conditions for adsorption of the three pharmaceuticals (DCF, SMX, and KTP) were assessed with pH 4, the dose of AC-Ws 0.28g/L, and a Temperature of 22 °C. At these conditions, the removal efficiency was 99.95%, 99.16%, and 99% for DCF, SMX, and KTP, respectively. Freundlich's model describes the adsorption of two pharmaceuticals efficiently: SMX and DCF, but the Langmuir model characterizes the adsorption of KTP. The pseudo-first-order model provided a satisfactory explanation for PPs kinetic adsorption over walnut shell adsorbent. The thermodynamic parameters revealed that the adsorption was spontaneous and exothermic for KTP and SMX, whereas DCF adsorbs randomly and endothermic on the activated carbon. The Boehm method determined the organic functions present on the surface of the adsorbent. The pharmaceutical adsorption mechanism over AC-Ws surface sites was further evaluated using the density functional theory (DFT) method. Therefore, the material prepared in this work possesses intrinsic characteristics that make it an excellent adsorbent to treat pharmaceutical contaminants in wastewater.
Effectiveness of a community-based support programme to reduce social inequality in exclusive breastfeeding: study protocol for a cluster-randomised trial
Authors: Rossau Henriette Knold , Nilsson Ingrid Maria Susanne , Busck-Rasmussen Marianne , Ekstrøm Claus Thorn , Gadeberg Anne Kristine , Hirani Jonas Cuzulan , Strandberg-Larsen Katrine , Villadsen Sarah Fredsted 
Published: February 2023

Abstract
Background

Breastmilk is the ideal nutrition for infants, and breastfeeding protects infants and mothers from a range of adverse health outcomes. In Denmark, most mothers initiate breastfeeding but many cease within the first months resulting in just 14% reaching the World Health Organization recommendation of six months of exclusive breastfeeding. Furthermore, the low breastfeeding proportion at six months is characterised by a marked social inequality. A previous intervention tested in a hospital setting succeeded in increasing the proportion of mothers breastfeeding exclusively at six months. However, most breastfeeding support is provided within the Danish municipality-based health visiting programme. Therefore, the intervention was adapted to fit the health visiting programme and implemented in 21 Danish municipalities. This article reports the study protocol, which will be used to evaluate the adapted intervention.

Methods

The intervention is tested in a cluster-randomised trial at the municipal level. A comprehensive evaluation approach is taken. The effectiveness of the intervention will be evaluated using survey and register data. Primary outcomes are the proportion of women who breastfeed exclusively at four months postpartum and duration of exclusive breastfeeding measured as a continuous outcome. A process evaluation will be completed to evaluate the implementation of the intervention; a realist evaluation will provide an understanding of the mechanisms of change characterising the intervention. Finally, a health economic evaluation will assess the cost-effectiveness and cost-utility of this complex intervention.

Discussion

This study protocol reports on the design and evaluation of the Breastfeeding Trial – a cluster-randomised trial implemented within the Danish Municipal Health Visiting Programme from April 2022 to October 2023. The purpose of the programme is to streamline breastfeeding support provided across healthcare sectors. The evaluation approach is comprehensive using a multitude of data to analyse the effect of the intervention and inform future efforts to improve breastfeeding for all.

Trial registration

Prospectively registered with Clinical Trials NCT05311631 https://clinicaltrials.gov/ct2/show/NCT05311631