cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Thermal and non-thermal Sunyaev-Zel'dovich effect in the cavities of the galaxy cluster MS 0735.6+7421: the role of the thermal density in the cavity
Creators: name: Marchegiani, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The galaxy cluster MS 0735.6+7421 hosts two large X-ray cavities, filled with radio emission, where a decrease of the Sunyaev-Zel'dovich (SZ) effect has been detected, without establishing if its origin is thermal (from a gas with very high temperature) or non-thermal. In this paper we study how thermal and non-thermal contributions to the SZ effect in the cavities are related; in fact, Coulomb interactions with the thermal gas modify the spectrum of low energy non-thermal electrons, which dominate the non-thermal SZ effect; as a consequence, the intensity of the non-thermal SZ effect is stronger for lower density of the thermal gas inside the cavity. We calculate the non-thermal SZ effect in the cavities as a function of the thermal density, and compare the SZ effects produced by thermal and non-thermal components, and with the one from the external Intra Cluster Medium (ICM), searching for the best frequency range where it is possible to disentangle the different contributions. We find that for temperatures inside the cavities higher than $\sim1500$ keV the non-thermal SZ effect is expected to dominate on the thermal one, particularly at high frequencies ($ν>500$ GHz), where it can also be a non-negligible fraction of the SZ effect from the external ICM. We also discuss the possible sources of astrophysical bias (as kinetic SZ effect and foreground emission from Galactic dust) and possible ways to address them, as well as necessary improvements in the modeling of the properties of cavities and the ICM.
description: 10 pages, 6 figures; accepted for publication in MNRAS
Nanoscale vector AC magnetometry with a single nitrogen-vacancy center in diamond
Creators: name: Wang, Guoqing
name: Liu, Yi-Xiang
name: Zhu, Yuan
name: Cappellaro, Paola
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Detection of AC magnetic fields at the nanoscale is critical in applications ranging from fundamental physics to materials science. Isolated quantum spin defects, such as the nitrogen-vacancy center in diamond, can achieve the desired spatial resolution with high sensitivity. Still, vector AC magnetometry currently relies on using different orientations of an ensemble of sensors, with degraded spatial resolution, and a protocol based on a single NV is lacking. Here we propose and experimentally demonstrate a protocol that exploits a single NV to reconstruct the vectorial components of an AC magnetic field by tuning a continuous driving to distinct resonance conditions. We map the spatial distribution of an AC field generated by a copper wire on the surface of the diamond. The proposed protocol combines high sensitivity, broad dynamic range, and sensitivity to both coherent and stochastic signals, with broad applications in condensed matter physics, such as probing spin fluctuations.
Традиционное скотоводство и природная среда: Культурно-экологические аспекты взаимодействия
Creators: name: А.Н., Ямсков
Publisher: name: Zenodo
Year: 1991
Subjects: традиционное скотоводство
этноэкология
этнография скотоводства
экология скотоводства

description: В статье рассмотрены феномен и экологические последствия перевыпаса в традиционном скотоводстве, а также его ведущая социо-культурная причина – стремление скотоводов увеличивать поголовье сверх текущих потребностей, так как только при избыточном количестве скота они могут сохранять своё хозяйство и образ жизни после неминуемых периодических падежей части животных от бескормицы в тяжелые по погодным условиям годы. Также описано явление и экологические последствия «трагедии общих ресурсов» при переходе от традиционного к товарному скотоводству.
The GBT Diffuse Ionized Gas Survey (GDIGS): Survey Overview and First Data Release
Creators: name: Anderson, L. D.
name: Luisi, Matteo
name: Liu, Bin
name: Wenger, Trey V.
name: Balser, Dana. S.
name: Bania, T. M.
name: Haffner, L. M.
name: Linville, Dylan J.
name: Mascoop, J. L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Green Bank Telescope (GBT) Diffuse Ionized Gas Survey (GDIGS) traces ionized gas in the Galactic midplane by measuring $4-8$GHz radio recombination line (RRL) emission. The nominal survey zone is $32.3^{\circ}> l >-5^{\circ}$, $|b|<0.5^{\circ}$, but coverage extends above and below the plane in select fields, and additionally includes the areas around W47 ($l \simeq 37.5^{\circ}$) and W49 ($l \simeq 43^{\circ}$). GDIGS simultaneously observes 22 Hn$α$ (15 usable), 25 Hn$β$ (18 usable), and 8 Hn$γ$ RRLs (all usable), as well as multiple molecular line transitions (including of H$_2^{13}$CO, H$_2$CO, and CH$_3$OH). Here, we describe the GDIGS survey parameters and characterize the RRL data, focusing primarily on the Hn$α$ data. We produce sensitive data cubes by averaging the usable RRLs, after first smoothing to a common spectral resolution of 0.5km/s and a spatial resolution of 2.65' for Hn$α$, 2.62' for Hn$β$, and 2.09' for Hn$γ$. The average spectral noise per spaxel in the \hna\ data cubes is $\sim\!10$mK ($\sim\!5$mJy/beam). This sensitivity allows GDIGS to detect RRLs from plasma throughout the inner Galaxy. The GDIGS Hn$α$ data are sensitive to emission measures $EM \gtrsim 1100$cm$^{-6}$pc, which corresponds to a mean electron density $\langle n_e \rangle \gtrsim 30$cm$^{-3}$ for a 1pc path length or $\langle n_e \rangle \gtrsim 1$cm$^{-3}$ for a 1kpc path length.
description: Accepted for publication by ApJS. Data may be downloaded here: http://astro.phys.wvu.edu/gdigs/
Additional file 4 of Caesarean section in pregnancies conceived by assisted reproductive technology: a systematic review and meta-analysis
Creators: name: Lodge-Tulloch, Nakeisha A.
name: Elias, Flavia T. S.
name: Pudwell, Jessica
name: Gaudet, Laura
name: Walker, Mark
name: Smith, Graeme N.
name: Velez, Maria P.
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Cell Biology
Developmental Biology
Science Policy

description: Additional file 4. GRADE summary of quality of evidence. GRADE approach (Grading of Recommendations Assessment, Development, and Evaluation)
One-loop divergences in the six-dimensional $\cal{N}=(1,0)$ hypermultiplet self-coupling model
Creators: name: Budekhina, A. S.
name: Merzlikin, B. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the six-dimensional $\cal{N}=(1,0)$ supersymmetric hypermultiplet model with arbitrary self-coupling. The model is considered in the external classical gauge superfield background. Using the harmonic superspace formulation we study the one-loop effective action of the model. We calculate the one-loop divergences in the theory as a gauge-invariant function of the external gauge multiplet. We demonstrate that the one-loop divergences in the theory do not vanish even in the case of on-shell hypermultiplet background. We briefly discuss an application of the developed technique to the hypermultiplet model in four dimensions.
description: 1+12 pages
The fate of spiral galaxies in clusters: the star formation history of the anemic Virgo cluster galaxy NGC 4569
Creators: name: Boselli, A.
name: Boissier, S.
name: Cortese, L.
name: de Paz, A. Gil
name: Seibert, M.
name: Madore, B. F.
name: Buat, V.
name: Martin, D. C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new method for studying the star formation history of late-type, cluster galaxies undergoing gas starvation or a ram-pressure stripping event by combining bidimensional multifrequency observations with multi-zones models of galactic chemical and spectrophotometricevolution. This method is applied to the Virgo cluster anemic galaxy NGC 4569. We extract radial profiles from recently obtained UV GALEX images at 1530 and 2310 A, from visible and near-IR narrow (Halpha) and broad band images at different wavelengths (u, B, g, V, r, i, z, J, H, K), from Spitzer IRAC and MIPS images and from atomic and molecular gas maps. The model in the absence of interaction (characterized by its rotation velocity and spin parameter) is constrained by the unperturbed H band light profile and by the Halpha rotation curve. We can reconstruct the observed total-gas radial-density profile and the light surface-brightness profiles at all wavelengths in a ram-pressure stripping scenario by making simple assumptions about the gas removal process and the orbit of NGC 4569 inside the cluster. The observed profiles cannot be reproduced by simply stopping gas infall, thus mimicing starvation. Gas removal is required, which is more efficient in the outer disk, inducing a radial quenching in the star formation activity, as observed and reproduced by the model. This observational result, consistent with theoretical predictions that a galaxy-cluster IGM interaction is able to modify structural disk parameters without gravitational perturbations, is discussed in the framework of the origin of lenticulars in clusters.
description: Accepted for publication on ApJ
Effect of van Hove singularity on the isotope effect and critical temperature of H$_{3}$S hydride superconductor as a function of pressure
Creators: name: Villa-Cortés, S.
name: De la Peña-Seaman, O.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have performed density functional calculations in conjunction with the linearized Migdal-Eliashberg equations and the functional derivative approach, which takes into account the energy-range dependence of the density of states at the Fermi level ($N(\varepsilon)$ variable on the scale of phonon energy), to determine the evolution of the critical temperature ($T_{c}$) and the isotope effect coefficient ($α$) of H$_{3}$S as a function of pressure on its $lm\bar{3}m$ crystal-structure range (from 162 to 250 GPa). Such approach, in comparison with $N(\varepsilon)$=$N(0)$=const., improves the agreement of $T_{c}$ with available experiments on the whole range of studied pressure. Considering for $α$ two main contributions: one positive coming from the electron-phonon (el-ph) and the other negative from the electron-electron interaction (el-el), we obtained a monotonic decrement as a function of pressure, independent of applied scheme ($N(\varepsilon)$ or $N(0)$). However, when $N(\varepsilon)$ is taken into account, an important renormalization occurs on both contributions, el-ph and el-el, improving the agreement with experimental data, specially for the high-pressure regime. The observed evolution of $T_{c}$ and $α$ as a function of pressure indicates, thus, the crucial role of the energy-dependence on $N(\varepsilon)$ for the proper analysis and description of the superconducting state on high-$T_{c}$ metal hydrides as H$_{3}$S, by considering the role of its van Hove singularities.
description: 12 pages, 12 figures
Chandra/LETGS Studies of the Collisional Plasma in 4U 1626-67
Creators: name: Hemphill, Paul B.
name: Schulz, Norbert S.
name: Marshall, Herman M.
name: Chakrabarty, Deepto
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present an analysis of \chandra/LETGS observations of the ultracompact X-ray binary (UCXB) 4U 1626$-$67, continuing our project to analyze the existing Chandra gratings data of this interesting source. The extremely low mass, hydrogen-depleted donor star provides a unique opportunity to study the properties and structure of the metal-rich accreted plasma. There are strong, double-peaked emission features of OVII-VIII and Ne IX-X, but no other identified emission lines are detected. Our spectral fit simultaneously models the emission line profiles and the plasma parameters, using a two-temperature collisionally-ionized plasma. Based on our line profile fitting, we constrain the inclination of the system to 25--60$^{\circ}$ and the inner disk radius to $\sim$1500 gravitational radii, in turn constraining the donor mass to $\lesssim$0.026 M_sun, while our plasma modeling confirms previous reports of high neon abundance in the source, establishing a Ne/O ratio in the system of $0.47 \pm 0.04$, while simultaneously estimating a very low Fe/O ratio of $0.0042 \pm 0.0008$ and limiting the Mg/O ratio to less than 1% by number. We discuss these results in light of previous work.
description: accepted by the Astrophysical Main Journal, 16 pages, 13 figures
AMPHIBIAN FAUNA AND THEIR ECOLOGICAL STATUS IN SINDH, PAKISTAN
Creators: name: IRFAN ALI TAGAR
name: KALSOOM SHAIKH
name: BILAWAL MAHAR
name: MUHAMMAD SAJJAD KALWAR
name: SHAMSHAD ALI TALPUR
name: ABDUL BARI MIRBAHAR
name: FOZIA RAJPER
Publisher: name: Zenodo
Year: 2023
Subjects: Frogs; Toads; Habitats; Water Quality; Sindh.

description: Abstract

Habitat degradation is amongst major threats to amphibian populations worldwide; therefore we investigated the status of amphibian habitats into agricultural ponds of Sindh province from January to December 2021. Altogether 21 habitats of Hoplobatrachus tigerinus, Euphlyctis cyanophlyctis, Allopa hazarensis and Bufo stomaticus were explored for determination of their aquatic and physical characteristics. Water quality parameters included electric conductivity, total dissolved solids, total hardness, total alkalinity, chlorides, sulphate, phosphate, nitrite and nitrate were recorded within high value except pH and carbon dioxide. Water quality changes were prominent every month due to variation in values of physic-chemical parameters. Vegetation present in premises of amphibian habitat in Sindh included Salvadora oleoides, Prosopis cineraria, Tamarix dioica, Tamarix aphylla, Typha latifolia, Typha elephantiana, Typha domingensis, Phragmites karka, Ipomoea aquatic and Salvinia molesta. Higher values of physico-chemical parameters were recorded during shriving period (spawning, hatching and metamorphosing), hence such habitats may affect amphibian populations of study area.
Automating workflows and providing academic credit to data curators for F.A.I.R. research data archiving.
Creators: name: Barbosa, Sonia Maria
Publisher: name: My University
Year: 2024
Subjects: Open Science
Open Access
Data processing
Data Management
AfricArXiv
Webinar
Research

description: This webinar, part of a series focused on enhancing research discoverability and efficiency in scholarly workflows, was introduced by Ebuka Ezeike, Project Manager at AfricArXiv. He highlighted AfricArXiv's role in promoting African research visibility and collaboration. The guest speaker, Sonia Barbosa, Associate Director at Dataverse, discussed the Dataverse project—a globally used open-source research data repository software. Sonia detailed automated data workflows, metadata management, and FAIR (Findable, Accessible, Interoperable, Reusable) principles in Dataverse. She also highlighted key features like the "Ask the Data" LLM tool, data visualization, and integration with large data management tools. The session underscored the importance of data curation, repository management, and upcoming features aimed at enhancing data accessibility and reuse within the Dataverse ecosystem.
description: Automating workflows and providing academic credit to data curators for F.A.I.R. research data archiving - AfricArXiv Open Science Webinar Series 2024 Watch the recording here: https://info-africarxiv.ubuntunet.net/2024/08/01/dataverse-automating-workflows-and-providing-academic-credit-to-data-curators-for-f-a-i-r-research-data-archiving/
Ground State Energy of Dilute Bose Gas in Small Negative Potential Case
Creators: name: Lee, Ji Oon
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: It is well known that the ground state energy of a three dimensional dilute Bose gas in the thermodynamic limit is $E=4πa ρN$ when the particles interact via a non-negative, finite range, symmetric, two-body potential. Here, $N$ is the number of particles, $ρ$ is the density of the gas, and $a$ is the scattering length of the potential. In this paper, we prove the same result without the non-negativity condition on the potential, provided the negative part is small.
description: 13 pages, AMS-LaTeX
Potential Loan Losses of Farmers and Lenders
Creators: name: Hanson, Gregory
name: Hanson, Gregory
Publisher: name: Unknown
Year: 1987
Subjects: Agricultural Finance
Financial Economics
Research Methods/ Statistical Methods

description: Agricultural lenders could potentially lose $6--$8 billion on farm operator loans in 1987-88. By 1989, $20 billion, or 10 percent of all farm loans outstanding m the early 1980's, will likely have been written off by lenders. By the end of 1987, 70-80 percent of all lender loan losses will probably have been taken. This means 75 percent of the farm debt crisis will have been worked through by the end of 1987. Land and commodity prices are projected to generally stabilize. If they do not lenders face a new round of loan losses in 1989-90, as currently solvent and/or recovering farmers find their balance sheets and earnings statements eroding under new financial pressures.
Additional file 4 of Enteral citrulline supplementation versus placebo on SOFA score on day 7 in mechanically ventilated critically ill patients: the IMMUNOCITRE randomized clinical trial
Creators: name: Tadié, Jean-Marc
name: Locher, Clara
name: Maamar, Adel
name: Reignier, Jean
name: Asfar, Pierre
name: Commereuc, Morgane
name: Lesouhaitier, Mathieu
name: Gregoire, Murielle
name: Le Pabic, Estelle
name: Bendavid, Claude
name: Moreau, Caroline
name: Diehl, Jean-Luc
name: Gey, Alain
name: Tartour, Eric
name: Le Tulzo, Yves
name: Thibault, Ronan
name: Terzi, Nicolas
name: Gacouin, Arnaud
name: Roussel, Mikael
name: Delclaux, Christophe
name: Tarte, Karin
name: Cynober, Luc
Publisher: name: figshare
Year: 2023
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 4. eTable 1: Median [IQR] daily energy (kcal/day) and protein (g/day) intake during study drug administration. eTable 2. Plasma concentrations of selected amino acids. eTable 3. Adverse Event Definitions.
Exploring the Potential of Aquaponics Systems in Advancing Food Security in Kenya: A Scoping Review
Creators: name: Outa, Nicholas
name: Ogello, Erick Ochieng
name: Wambui, Caroline
Publisher: name: Science and Education Publishing
Year: 2024

description: The pressing issue of global food insecurity demands immediate attention, particularly in developing nations like Kenya. Traditional agricultural methods in these regions often involve high resource consumption, limited nutrient recycling, and substantial negative environmental impacts. In light of the escalating demand for food production and the imperative for sustainable food systems, it is crucial to explore innovative and efficient technologies capable of concurrently addressing nutrient management, water utilization, and food production challenges. The prevalent reliance on chemical fertilizers within Kenya's food production sector adversely affects both soil and environmental health, leading to a gradual decline in agricultural productivity. Additionally, many regions in Kenya grapple with water scarcity, posing a significant obstacle to food production. The heavy dependence on rain-fed agriculture further exposes food production to fluctuations in climatic conditions. Monoculture-based food systems demonstrate inefficiencies in land, water, and nutrient usage. Despite its current limited adaptability, aquaponics emerges as a promising solution to confront these challenges by optimizing water, nutrient, and land utilization in food production. Case studies in Kenya have demonstrated the potential of aquaponics in enhancing food production. This scoping review provide information on the status of aquaponics adoption in Kenya, challenges and barriers to adoption and the possible solutions to enhance adoption of aquaponics in the Kenyan food production sector.
Diamond Open Access publishing in Africa
Creators: name: Kuchma, Iryna
name: Chiparausha, Blessing
name: Lamptey, Richard Bruce
name: Ševkušić, Milica
name: Smith, Ina
Publisher: name: My University
Year: 2024
Subjects: Open Access
Open Science
Diamond Open Access
Publish
Africa
AfricArXiv
Research

description: This webinar session focused on the landscape study of open access publishing in Africa, led by Iryna Kuchma, highlighting the challenges and opportunities of diamond open access journals in Africa. Key points included the need for institutional support, sustainable funding, and the importance of editorial quality and research integrity. Case studies from Zimbabwe, Ghana, and South Africa were presented, emphasizing the need for capacity building, awareness, and advocacy to support diamond open access publishing in Africa.
description: Diamond Open Access publishing in Africa - AfricArXiv Open Science Webinar Series 2024 Watch the recording here: https://info-africarxiv.ubuntunet.net/2024/08/15/diamond-open-access-publishing-in-africa/
COST IN ENTREPRENEURSHIP AND SMALL BUSINESS ACTIVITIES AND ITS ANALYSIS
Creators: name: Salaxiddinova, Zulayxo
Publisher: name: Zenodo
Year: 2024

description: This study examines the role of cost analysis in entrepreneurship and small business activities in Uzbekistan. Through a comprehensive literature review and analysis of secondary data, the research investigates common cost structures, cost management strategies, and the impact of costs on small business success in the Uzbek context. The findings highlight the critical importance of effective cost management for small business sustainability and growth, while also identifying challenges specific to the Uzbek business environment. Recommendations have been made for entrepreneurs, small business entities, and future research.
Highly strained mixtures of bidimensional soft and rigid grains: an experimental approach from the local scale
Creators: name: Barés, Jonathan
name: Cárdenas-Barrantes, Manuel
name: Cantor, David
name: Azéma, Émilien
name: Renouf, Mathieu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Granular systems are not always homogeneous and can be composed of grains with very different mechanical properties. To improve our understanding of the behavior of real granular systems, in this experimental study, we compress 2D bidisperse systems made of both soft and rigid grains. By means of a recently developed experimental set-up, \md{from the measurement of the displacement field we can} follow all the mechanical observables of this granular medium from the inside of each particle up-to-the whole system scale. We \md{are able to} detect the jamming transition from these observables and study their evolution deep in the jammed state for packing fractions as high as $0.915$. We show the uniqueness of the behavior of such a system, \md{in which way} it is similar to purely soft or rigid systems and how it is different from them. This study constitutes the first step toward a better understanding of the mechanical behavior of granular materials that are polydisperse in terms of grain rheology.
description: 4 pages
Partial characterization and purification of a murine suppressor-inducer factor secreted by a natural supressor cell line and characterizaton of the binding of antisera raised to murine antigen-specfic suppressive material in human peripheral leukocytes
Creators: name: Norman, Nadine Elizabeth
Publisher: name: University of British Columbia
Year: 2010

description: A large amount of effort has gone into the elucidation of the mechanism of suppression of the immune system. This level of immunoregulation has been demonstrated to be mediated by both antigen-nonspecific and antigen-specific protein factors elicited by leukocytes. In this work, two different modes of immunosuppression were investigated. First, an attempt was made to purifiy an antigen-nonspecific protein factor, SIF (Suppressor Inducer Factor) secreted by the Natural Suppressor cell line M1-A5. M1-A5 culture supernatants were subjected to ion exchange chromatogrphy (IEC) and fast protein liquid chromatography (FPLC). Bioactivity of eluted fractions was determined by the plaque forming cell assay and followed through the purification. Reducing SDS-PAGE of selected fractions suggested that bands with Mr's of >110 KD and/or 55 KD were mediating the suppressive activity. In addition, an assay was developed to further investigate the mode of action of SIF. Second, the binding of two antisera raised to components associated with murine antigen-specific suppression was studied using human peripheral leucocytes and several human tumour cell lines. Anti-p80 and anti-p30 binding was found to be variable (within a range) and to involve two populations of human mononuclear cells. Subsequently, it was found that all CD3⁺ (T cells), CD19⁺ (B cells) and neutophils expressed both the p80 and p30 determinants. Four human leukemic cell lines were found to express varying levels of the p80 and p30 determinants. Cell lysates from each of the cell lines were subjected to Western blot analyses using anti-p30. The results showed that anti-p30 binds to a major band of 42 KD and minor bands of 60 and 80 KD in all lysates. In addition, a 25 KD band was observed in RAJI and CEM-CM3 lysates only. Thus, it appears that HuT 78 cells sythesize but are unable to express the p30-containing, 42 KD molecule on the cell surface. No firm conclusions can be made with respect to the biochemical nature or mechanisism of action of either of the two suppressor factors studied in this work. Research into the mechanisms of suppression of the immune system is complex and multi-faceted, and it seems that for now, there will remain a gap in our overall understanding of immune regulation.
Response to Health Crises in Africa: Insight From Executing a 2-Year Project in Nigeria
Creators: name: Muhammad, Aliyu
name: Ibrahim, Mohammed Auwal
name: Okoli, Peter Chukwunonso
name: Sogbanmu, Temitope
name: Ehilen, Oseghale Emmanuel
name: Isah, Murtala
name: Mohammed, Isah Yakub
name: Animasaun, Isaac Lare
name: Anjorin, AbdulAzeez
name: Kenechukwu, Franklin
name: Ibrahim, Mutiat Bolanle
name: Ibor, Oju Richard
name: Adesiyan, Ibukun Modupe
name: Umeyor, Chukwuebuka Emmanuel
name: Garba, Zaharaddeen Nasiru
name: Anyanwu, Gabriel
name: Ifeanyi-Obi, Chinwoke Clara
name: Adeyemi, Kayode Abiodun
Publisher: name: My University
Year: 2024
Subjects: collaboration
evidence
pandemic
policymakers
science advice
Nigerian Young Academy

description: Science advice aids in integrating scientific evidence into policymaking. In Africa, a significant gap exists between science and policy, necessitating high-quality advisory services. The Multifaceted Response Development from Research on COVID-19 in Africa (MURDER COVID-19) project by the Nigerian Young Academy (May 2021–April 2023) aimed to bridge this gap. Project outputs included eight policy briefs, 10 webinars, a hybrid international conference, and a searchable research equipment database. The project effectively dispelled COVID-19 myths, promoted vaccine confidence, and highlighted the need to strengthen health systems and research capacity. The project provides valuable lessons/recommendations and serves as a model for collaborative initiatives addressing health crises and enhancing research capacity.
Infrared structure of $e^+e^- \to 3$ jets at NNLO: QED-type contributions
Creators: name: Ridder, A. Gehrmann-De
name: Gehrmann, T.
name: Glover, E. W. N.
name: Heinrich, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The NNLO QCD corrections to the $e^+e^- \to 3$ jets can be decomposed according to their colour factors. Out of the seven colour factors, three are of QED-type: $1/N^2$, $N_F/N$ and $N_F^2$. We use the antenna subtraction method to compute these contributions, providing complete expressions for the subtraction terms in $N_F/N$ and $N_F^2$.
description: Talk presented at Loops and Legs 2006, Eisenach
Fair pay and Ride-hailing Drivers' Willingness to form and join Worker-Platform Co-operatives in Kenya
Creators: name: Matabi, Jared Mark O.
name: Gicheru, Esther Njoki
name: Kiganane, Lucy Maina
Publisher: name: My University
Year: 2024

description: Kenya's increasing dependency on ride-hailing platforms (the 'uberization') has not translated into drivers’ improved quality of life. E-drivers in the country still face several challenges similar to those faced elsewhere in the world. Among these challenges is the unfair pay distribution. It is essential to understand how such challenges can be mitigated or addressed. Previous studies have recommended that e-drivers in the country should form worker-platform co-operatives. The study was undertaken to estimate the extent to which the fairwork principles, including fair pay, would trigger e-drivers’ willingness to form and join worker-platform co-operatives. We applied critical-realism research philosophy and the discrete choice experiment design. Data was primarily collected through a discrete choice questionnaire administered to participants in person and online. The study respondents of 497 out of the 600 questionnaires from the Nairobi Metropolitan Region –Nairobi City, Kiambu, Machakos and Kajiado Counties – were used and analysed using the multinomial logistic regression on Jamovi version 2.5.6.0 statistical software. The study shows that pay rates have significant implications for the behaviour of e-drivers in the ride-hailing industry. We found that e-drivers’ willingness to form and join worker-platform co-operatives would be influenced by their dissatisfaction with the investor-owned firms’ compliance with the fairwork principle of pay. This suggests that e-drivers are more inclined towards co-operative (social representation and collective action) structures when they are dissatisfied with pay rates offered by the existing ride-hailing investor-owned firms. This indicates e-drivers' desire for the co-operative values of solidarity, equality, and equity and the third co-operative principle on members’ economic participation in the ride-hailing industry. These findings underscore the importance of the stakeholders in the Ministries of Transport, Labour, Internal Security, and Co-operative Development in advocating for and enforcing fairwork principles in the ride-hailing industry by promoting worker-platform co-operatives in the country.
New Projections for Dark Matter Searches with Paleo-Detectors
Creators: name: Baum, Sebastian
name: Edwards, Thomas D. P.
name: Freese, Katherine
name: Stengel, Patrick
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Paleo-detectors are a proposed experimental technique to search for dark matter (DM). In lieu of the conventional approach of operating a tonne-scale real-time detector to search for DM-induced nuclear recoils, paleo-detectors take advantage of small samples of naturally occurring rocks on Earth that have been deep underground ($\gtrsim 5$ km), accumulating nuclear damage tracks from recoiling nuclei for $\mathcal{O}(1)$ Gyr. Modern microscopy techniques promise the capability to read out nuclear damage tracks with nanometer resolution in macroscopic samples. Thanks to their $\mathcal{O}(1)$ Gyr integration times, paleo-detectors could constitute nuclear recoil detectors with keV recoil energy thresholds and 100 kilotonne-yr exposures. This combination would allow paleo-detectors to probe DM-nucleon cross sections orders of magnitude below existing upper limits from conventional direct detection experiments. In this article, we use improved background modeling and a new spectral analysis technique to update the sensitivity forecast for paleo-detectors. We demonstrate the robustness of the sensitivity forecast to the (lack of) ancillary measurements of the age of the samples and the parameters controlling the backgrounds, systematic mismodeling of the spectral shape of the backgrounds, and the radiopurity of the mineral samples. Specifically, we demonstrate that even if the uranium concentration in paleo-detector samples is $10^{-8}$ (per weight), many orders of magnitude larger than what we expect in the most radiopure samples obtained from ultra basic rock or marine evaporite deposits, paleo-detectors could still probe DM-nucleon cross sections below current limits. For DM masses $\lesssim 10$ GeV/$c^2$, the sensitivity of paleo-detectors could still reach down all the way to the conventional neutrino floor in a Xe-based direct detection experiment.
description: Invited contribution to Instruments "Special Issue Innovative Experimental Techniques for Direct Dark Matter Detection)". 30 pages, 5 figures, 1 table. Code available at https://github.com/sbaum90/paleoSpec and https://github.com/sbaum90/paleoSens
Construction of the Bethe State for the $E_{τ,η}(so_3)$ Elliptic Quantum Group
Creators: name: Manojlovic, Nenad
name: Nagy, Zoltan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 82B23; 81R12; 81R50

description: Elliptic quantum groups can be associated to solutions of the star-triangle relation of statistical mechanics. In this paper, we consider the particular case of the $E_{τ,η}(so_3)$ elliptic quantum group. In the context of algebraic Bethe ansatz, we construct the corresponding Bethe creation operator for the transfer matrix defined in an arbitrary representation of $E_{τ,η}(so_3)$.
description: This is a contribution to the Proc. of workshop on Geometric Aspects of Integrable Systems (July 17-19, 2006; Coimbra, Portugal), published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Evolution and mass extinctions as lognormal stochastic processes
Creators: name: Maccone, Claudio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Probability (math.PR)
subject: FOS: Biological sciences
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In a series of recent papers and in a book, this author put forward a mathematical model capable of embracing the search for extra-terrestrial intelligence (SETI), Darwinian Evolution and Human History into a single, unified statistical picture, concisely called Evo-SETI. The relevant mathematical tools are: (1) Geometric Brownian motion (GBM), the stochastic process representing evolution as the stochastic increase of the number of species living on Earth over the last 3.5 billion years. This GBM is well known in the mathematics of finances (Black-Sholes models). (2) The probability distributions known as b-lognormals, i.e. lognormals starting at a certain positive instant b>0 rather than at the origin. In the framework of Darwinian Evolution, the resulting mathematical construction was shown to be what evolutionary biologists call Cladistics. (3) The (Shannon) entropy of such b-lognormals is then seen to represent the 'degree of progress' reached by each living organism or by each big set of living organisms, like historic human civilizations. (4) All these results also match with SETI in that the statistical Drake equation (generalization of the ordinary Drake equation to encompass statistics) leads just to the lognormal distribution as the probability distribution for the number of extra-terrestrial civilizations existing in the Galaxy. (5) The well-known 'Molecular Clock of Evolution', namely the 'constant rate of Evolution at the molecular level' as shown by Kimura's Neutral Theory of Molecular Evolution, identifies with growth rate of the entropy of our Evo-SETI model. (6) Furthermore, we apply our Evo-SETI model to lognormal stochastic processes other than GBMs. For instance, we provide two models for the mass extinctions that occurred in the past. (7) Finally, we show that the Markov & Korotayev model for Darwinian Evolution identifies with an Evo-SETI model.
description: 20 pages, 8 figures
แรงงานทาสและร่างพระราชบัญญัติทาสสมัยใหม่ของอังกฤษ
Creators: name: ณัฏฐณิชา เลอฟิลิแบร์ต
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยนเรศวร
Year: 2558
Subjects: -

description: 1, 8, วารสารนิติศาสตร์ มหาวิทยาลัยนเรศวร
Primary Healthcare System Strengthening in Nigeria: A means to achieve Universal Health Coverage
Creators: name: Sokolabe, Yisa Sarah
name: Ogunniyi, Tolulope
Publisher: name: My University
Year: 2024
Subjects: INTERDISCIPLINARY RESEARCH AREAS::Health and medical services in society
Health
SDG 3
SDG 10
Universal Health Coverage

description: According to the WHO, more than 1 billion individuals globally risk becoming impoverished because their household's out-of-pocket medical expenses account for 10% or more of their income. A shift in health systems towards primary health care (PHC) as a means to achieving universal health coverage (UHC) in low- and middle-income nations is important in preventing 60 million deaths and adding 3.7 years to the average life expectancy. Nigeria, ranked 187th among 191 countries in the WHO health system performance ranking, faces challenges with PHC owing to inadequate health infrastructure, a shortage of healthcare professionals, and weak health systems, impeding its progress toward achieving UHC. In achieving UHC, the country started prioritizing the revitalization of PHC through collaboration, making great strides in improving PHC, with hundreds of facilities being renovated and more healthcare professionals being hired and trained. Recently, almost 10 million children have received diphtheria and tetanus vaccines in Nigeria, and 4.95 million girls aged 9 to 14 in 15 states have received HPV vaccinations to protect them from cervical cancer. To better achieve UHC, Nigeria need to seek for more collaboration from the private sector and also, the brain drain of healthcare workers should be addressed by providing a sustainable working environment. Data availability statement: Data sharing is not applicable to this article as no new data were created or analyzed in this study.
On the Distortion SNR Exponent of Some Layered Transmission Schemes
Creators: name: Bhattad, Kapil
name: Narayanan, Krishna R.
name: Caire, Giuseppe
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We consider the problem of joint source-channel coding for transmitting K samples of a complex Gaussian source over T = bK uses of a block-fading multiple input multiple output (MIMO) channel with M transmit and N receive antennas. We consider the case when we are allowed to code over L blocks. The channel gain is assumed to be constant over a block and channel gains for different blocks are assumed to be independent. The performance measure of interest is the rate of decay of the expected mean squared error with the signal-to-noise ratio (SNR), called the distortion SNR exponent. We first show that using a broadcast strategy of Gunduz and Erkip, but with a different power and rate allocation policy, the optimal distortion SNR exponent can be achieved for bandwidth efficiencies 0 < b < (|N-M|+1)/min(M,N). This is the first time the optimal exponent is characterized for 1/min(M,N) < b < (|N-M |+ 1)/ min(M, N). Also, for b > MNL^2, we show that the broadcast scheme achieves the optimal exponent of MNL. Special cases of this result have been derived for the L=1 case and for M=N=1 by Gunduz and Erkip. We then propose a digital layered transmission scheme that uses both time layering and superposition. This includes many previously known schemes as special cases. The proposed scheme is at least as good as the currently best known schemes for the entire range of bandwidth efficiencies, whereas at least for some M, N, and b, it is strictly better than the currently best known schemes.
description: 26 Pages. 10 figures, Submitted to IEEE Trans. on IT
Antimicrobial resistance: One health approach in Rwanda
Creators: name: Sindayigaya, Patience
name: Dine, Roseline Dzekem
name: Ntakirutimana, Augustin
name: Nkurikiyimfura, Jean De Dieu
name: Uyisaba, Pascaline
Publisher: name: My University
Year: 2024
Subjects: Antimicrobial resistance
Global Health
SDG 3
SDG 6
Health
Community medicine
Social medicine

description: This commentary provides the authors' views related to the Antimicrobial Resistance (AMR) profile in Rwanda in terms of prevalence, knowledge, attitudes, practices, and existing interventions at the one health interface. AMR is a critical and global health concern posing a significant threat to the effective treatment of infections and lead to increased morbidity and mortality. Among few studies that have been conducted on AMR in Rwanda, the issue was found to be widespread in both human and animals. A high resistance has been found among the commonly used antibiotics seconded by the lack of knowledge and appropriate practices among different groups of people. Some interventions, including “one health” approach are in place aiming to address these issues, but challenges are still around due to developing surveillance system, limited studies, and low public awareness. Extensive studies and enhance surveillance are recommended to better understand AMR to inform the public and policy makers for effectively tackling of the AMR issue, particularly in rural areas. Data availability statement: Data sharing does not apply to this article as no new data were created or analyzed in this study.
การให้ความคุ้มครองอุตสาหกรรมการบริการอาหารภายใต้กฎหมายทรัพย์สินทางปัญญาของไทย
Creators: name: ชุติมดี กอจิตตวนิจ
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยนเรศวร
Year: 2558
Subjects: อุตสาหกรรมการบริการอาหาร, กฎหมายลิขสิทธิ์, กฎหมายสิทธิบัตร, กฎหมายเครื่องหมายการค้า, กฎหมายความลับทางการค้า

description: 1, 8, วารสารนิติศาสตร์ มหาวิทยาลัยนเรศวร
แนวทางการคุ้มครองสิทธินักแสดงภายใต้สนธิสัญญาปักกิ่งว่าด้วย การแสดงในโสตทัศนวัสดุขององค์กรทรัพย์สินทางปัญญาโลก
Creators: name: พิชชานี วงศ์ซื่อสัตย์
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยนเรศวร
Year: 2558
Subjects: สนธิสัญญา, สิทธินักแสดง, งานโสตทัศนวัสดุ

description: 1, 8, วารสารนิติศาสตร์ มหาวิทยาลัยนเรศวร
Dyson Schwinger Equations: From Hopf algebras to Number Theory
Creators: name: Kreimer, Dirk
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider the structure of renormalizable quantum field theories from the viewpoint of their underlying Hopf algebra structure. We review how to use this Hopf algebra and the ensuing Hochschild cohomology to derive non-perturbative results for the short-distance singular sector of a renormalizable quantum field theory. We focus on the short-distance behaviour and thus discuss renormalized Green functions $G_R(α,L)$ which depend on a single scale $L=\ln q^2/μ^2$.
description: 23 p, 1 Figure, talk given at the workshop on "Renormalization and Universality in Mathematical Physics", Toronta, Canada, October 18-22, 2005. Typos corrected, references updated
The use of mobile phones by secondary school teachers and students in Cameroon: m-learning as a possible educational strategy
Creators: name: LOMINE, LOYKIE
name: CELESTINE, ATANGCHO FUBE
Publisher: name: N/A
Year: 2024
Subjects: M-learning
mobile learning
online learning
educational strategies
Cameroon
Yaoundé
secondary education.

description: This research paper examines the extent to which m-learning (the use of mobile phones for pedagogical purposes) can be implemented in secondary education in Cameroon – not on its own, and not to replace face-to-face teaching, but as part of a repertoire of educational strategies. Secondary research (about m-learning and about Cameroon) and primary research (carried out in Yaoundé in June 2022 to collect data from 140 students and 42 teachers about their access to technological devices, especially mobile phones) show that m-learning can be put in place in Cameroon without too many difficulties. It needs, however, to be a version of m-learning that is conceptually different from the one common in countries where access to the internet is illimited, uninterrupted and stable: that “Western” form of m-learning is no suitable for Cameroon, neither technologically nor economically. This research paper concludes that m-learning is possible and even desirable in Cameroon, but it must be contextualized.
การนำเทคโนโลยีสารสนเทศมาใช้ในการฟ้องด้วยวาจา
Creators: name: คณพล จันทน์หอม, ชัชพล ไชยพร
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยนเรศวร
Year: 2558
Subjects: เทคโนโลยีสารสนเทศ, การฟ้องคดีด้วยวาจา, พนักงานอัยการ

description: 1, 8, วารสารนิติศาสตร์ มหาวิทยาลัยนเรศวร
Unlocking open science in Africa: Mentorship and grassroot community building
Creators: name: Kibet, Caleb K.
Publisher: name: IOS Press
Year: 2023
Subjects: Open Science
Africa
research collaboration
mentoring
grass roots communities
OpenScienceKE
H3ABioNet
BHKi

description: Open Science is becoming increasingly popular among scientists worldwide, but African researchers have hesitated to adopt it. This keynote speech addresses the current state of open science in Africa and the challenges researchers face in implementing open science practices. As an open science advocate and mentor in Africa, I share my experiences and discuss the role of mentorship and grassroots community building in overcoming these challenges. Various initiatives, such as OpenScienceKE, H3ABioNet, and BHKi, aim to increase awareness, empower members, and encourage collaboration to promote open science, information sharing, resource sharing, and the visibility of African research. It is essential to involve all stakeholders within local communities and empower grassroots communities. Like planning for a mountain climb, providing the necessary support to facilitate success is crucial. The article highlights the importance of inclusivity and support to overcome barriers and challenges to reap the benefits of open science. I show how culture changes towards openness, breaking down barriers, empowerment, allyship, and grassroots community building are pathways to achieve this change.