Research publications: Recent submissions

Now showing items 1101-1120 of 23694

    • Gaia21bty: An EXor light curve exhibiting a FUor spectrum 

      Siwak, Michał; Hillenbrand, Lynne A.; Kóspál, Ágnes; Ábrahám, Péter; Giannini, Teresa; De, Kishalay; Moór, Attila; Szilágyi, Máté; Janík, Jan; Koen, Chris; Park, Sunkyung; Nagy, Zsófia; Miera, Fernando Cruz-Sáenz de; Fiorellino, Eleonora; Marton, Gábor; Kun, Mária; Lucas, Philip W.; Udalski, Andrzej; Szabó, Zsófia Marianna (2023-10-30)
      Gaia21bty, a pre-main sequence star that previously had shown aperiodic dips in its light curve, underwent a considerable Delta G~2.9 mag brightening that occurred over a few months between 2020 October - 2021 February. ...

    • Multiwavelength detection of an ongoing FUOr-type outburst on a low-mass YSO 

      Guo, Zhen; Lucas, P. W.; Kurtev, R. G.; Borissova, J.; Elbakyan, V.; Morris, C.; Bayo, A.; Smith, L.; Garatti, A. Caratti o; Peña, C. Contreras; Minniti, D.; Jose, J.; Ashraf, M.; Alonso-García, J; Miller, N.; Muthu, H. D. S. (2024-03-01)
      During the pre-main-sequence evolution, Young Stellar Objects (YSOs) assemble most of their mass during the episodic accretion process. The rarely seen FUOr-type events are valuable laboratories to investigate the outbursting ...

    • A Benchmark White Dwarf-Ultracool Dwarf Wide Field Binary 

      Ferreira, Thiago; Saito, Roberto K.; Minniti, Dante; Mejías, Andrea; Caceres, Claudio; Alonso-García, Javier; Beamín, Juan Carlos; Smith, Leigh C.; Gomez, Matías; Lucas, Philip W.; Ivanov, Valentin D. (2023-12-19)
      We present the discovery and multi-wavelength characterisation of VVV J1438-6158 AB, a new field wide-binary system consisting of a 4.6(+5.5-2.4) Gyr and Teff = 9500+/-125 K DA white dwarf (WD) and a Teff = 2400+/-50 K M8 ...

    • On the incidence of episodic accretion in Class I YSOs from VVV 

      Peña, Carlos Contreras; Lucas, Philip W.; Guo, Zhen; Smith, Leigh (2024-02-01)
      Episodic accretion is one of the competing models to explain the observed luminosity spread in young stellar clusters. These short-lived high accretion events could also have a strong impact on planet formation. Observations ...

    • Spectroscopic confirmation of high-amplitude eruptive YSOs and dipping giants from the VVV survey 

      Guo, Zhen; Lucas, P. W.; Kurtev, R.; Borissova, J.; Peña, C. Contreras; Yurchenko, S. N.; Smith, L. C.; Minniti, D.; Saito, R. K.; Bayo, A.; Catelan, M.; Alonso-García, Javier; Garatti, A. Caratti o; Morris, C.; Froebrich, D.; Tennyson, J.; Maucó, K.; Aguayo, A.; Miller, N.; Muthu, H. D. S. (2024-02-01)
      During the pre-main-sequence (pre-MS) evolution stage of a star, significant amounts of stellar mass are accreted during episodic accretion events, such as multidecade FUor-type outbursts. Here, we present a near-infrared ...

    • The climate emergency in Africa 

      Wengraf, Lee; Bujra, Janet; Mfula, Chanda; Greco, Elisa; Bush, Ray (2023-12-30)

    • The most variable VVV sources: eruptive protostars, dipping giants in the Nuclear Disc and others 

      Lucas, P. W.; Smith, L. C.; Guo, Z.; Peña, C. Contreras; Minniti, D.; Miller, N.; Alonso-García, Javier; Catelan, M.; Borissova, J.; Saito, R. K.; Kurtev, R.; Navarro, M. G.; Morris, C.; Muthu, H.; Froebrich, D.; Ivanov, V. D.; Bayo, A.; Garatti, A. Caratti o; Sanders, J. L. (2024-02-01)
      We have performed a comprehensive search of a VISTA Variables in the Via Lactea (VVV) data base of 9.5 yr light curves for variable sources with ΔKs ≥ 4 mag, aiming to provide a large sample of high amplitude eruptive young ...

    • Comparison of cytotoxicity of Miltefosine and its niosomal form on chick embryo model 

      Seyedi, Fatemeh; Sharifi, Iraj; Khosravi, Ahmad; Molaakbari, Elaheh; Tavakkoli, Hadi; Salarkia, Ehsan; Bahraminejad, Sina; Bamorovat, Mehdi; Dabiri, Shahriar; Salari, Zohreh; Kamali, Ali; Ren, Guogang (2024-01-30)
      Various drugs have been used for the treatment of leishmaniasis, but they often have adverse effects on the body's organs. In this study, we aimed to explore the effects of one type of drug, Miltefosine (MIL), and its ...

    • Physical Activity Inclusion in Dementia-Friendly Communities: A Mixed Methods Study 

      Hadley, Rebecca; Mathie, Elspeth; Pike, Elizabeth; Goodman, Claire (2024-06-01)
      Dementia-friendly communities (DFCs) are a policy-endorsed approach to community engagement in England that promotes social inclusion to enable people affected by dementia to live well. Research suggests that physical ...

    • Numerical study on the heat transfer performance of mine ice-storage cooling device 

      Guo, Weishuang; Zhang, Zujing; Liang, Xing; Wu, Hongwei; Ge, Liang; Mao, Ruiyong (2024-05-15)
      The thermal performance of the ice-storage cooling device used in the underground mine refuge chamber is poor, which causes a waste of energy. Therefore, it is necessary to improve the heat transfer performance of ice ...

    • Why Millennials Continue to Use WhatsApp? A Focus on Culture and Computer–Human Dialogue 

      Allil, Kamaal; Faisal, Serri; Zia, Adil (2024-01-29)
      Continuous usage behavior among millennials is crucial, yet factors influencing this behavior are not well understood. This study integrates human-computer interaction and marketing research to investigate the relationship ...

    • Integrating AI-driven marketing analytics techniques into the classroom: pedagogical strategies for enhancing student engagement and future business success 

      Allil, Kamaal (2024-01-27)
      This paper outlines a practical pedagogical framework for integrating AI-driven analytics into marketing education, tailored to equip students for the fast-evolving industry. Central to this approach is an iterative model ...

    • Strategies for optimal sky subtraction in the low surface brightness regime 

      Watkins, A. E.; Kaviraj, S.; Collins, C. C.; Knapen, J. H.; Kelvin, L. S.; Duc, P. -A.; Román, J.; Mihos, J. C. (2024-03-01)
      The low surface brightness (LSB) regime (μg  ≳  26 mag arcsec−2) comprises a vast, mostly unexplored discovery space, from dwarf galaxies to the diffuse interstellar medium. Accessing this regime requires precisely removing ...

    • Exploring Advanced Functionalities of Carbon Fiber-Graded PEEK Composites as Bone Fixation Plates Using Finite Element Analysis 

      Zhang, Chenggong; Wen, Pihua; Xu, Yigeng; Fu, Zengxiang; Ren, Guogang (2024-01-14)
      This study aims to address the challenges associated with conventional metallic bone fixation plates in biomechanical applications, such as stainless steel and titanium alloys, including stress shielding, allergic reactions, ...

    • Tree-level color-kinematics duality from pure spinor actions 

      Borsten, Leron; Jurco, Branislav; Kim, Hyungrok; Macrelli, Tommaso; Saemann, Christian; Wolf, Martin (2023-12-14)
      We prove that the tree-level scattering amplitudes for (super) Yang-Mills theory in arbitrary dimensions and for M2-brane models exhibit color-kinematics (CK) duality. Our proof for Yang-Mills theory substantially simplifies ...

    • Biowaste management: Comparison of banana (Musa acuminata) and bamboo (Bambusa vulgaris) fibers 

      Jeyaraj, Dhesinghraja; Kalimuthu, Mayandi; Nagarajan, Rajini; Chithamparam, Prakash; Ismail, Sikiru O.; Mohammad, Faruq; Al-Lohedan, Hamad A.; Krishnan, Kumar (2024-01-05)
      Both developed and developing countries around the world are increasingly utilizing biodegradable products and bio-based materials. This is required to curb rampant environmental pollution caused by synthetic materials and ...

    • International financial subordination in the age of asset manager capitalism 

      Bonizzi, Bruno; Kaltenbrunner, Annina (2024-03-30)
      The rise of asset managers as key nodes of financial intermediation has been one of the most fundamental changes in the global economy over recent years. An emerging literature on asset manager capitalism (AMC) discusses ...

    • Benzodiazepine Boom: Tracking Etizolam, Pyrazolam, and Flubromazepam from Pre-UK Psychoactive Act 2016 to Present Using Analytical and Social Listening Techniques 

      Mullin, Anthony; Scott, Mark; Vaccaro, Giorgia; Floresta, Giuseppe; Arillotta, Davide; Catalani, Valeria; Corkery, John M; Stair, Jacqueline L; Schifano, Fabrizio; Guirguis, Amira (2024-01-12)
      Introduction: The designer benzodiazepine (DBZD) market continues to expand whilst evading regulatory controls. The widespread adoption of social media by pro-drug use communities encourages positive discussions around ...

    • Source Camera Identification Techniques: A Survey 

      Nwokeji, Chijioke Emeka; Sheikh-Akbari, Akbar; Gorbenko, Anatoliy; Mporas, Iosif (2024-01-25)
      The successful investigation and prosecution of significant crimes, including child pornography, insurance fraud, movie piracy, traffic monitoring, and scientific fraud, hinge largely on the availability of solid evidence ...

    • Rapid Chemical Enrichment by Intermittent Star Formation in GN-z11 

      Kobayashi, Chiaki; Ferrara, Andrea (2024-02-06)
      We interpret the peculiar supersolar nitrogen abundance recently reported by the James Webb Space Telescope observations for GN-z11 (z = 10.6) using our state-of-the-art chemical evolution models. The observed CNO ratios ...