A structural modeling notation for the typed functional paradigm
- Authors: Motara, Yusuf, M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428948 , vital:72548 , https://doi.org/10.1145/3341105.3373863
- Description: Although typed functional programming is becoming increasingly important for practical software development, it remains inaccessible from a modeling perspective. This paper develops and theoretically justifies an initial best-practices notation for the typed functional paradigm. A small case study explores how the same scenario is modeled differently in the object-oriented and typed functional paradigms, and it is argued that the notation developed is a necessary step on the path to a more comprehensive notation for modeling within the paradigm.
- Full Text:
- Authors: Motara, Yusuf, M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428948 , vital:72548 , https://doi.org/10.1145/3341105.3373863
- Description: Although typed functional programming is becoming increasingly important for practical software development, it remains inaccessible from a modeling perspective. This paper develops and theoretically justifies an initial best-practices notation for the typed functional paradigm. A small case study explores how the same scenario is modeled differently in the object-oriented and typed functional paradigms, and it is argued that the notation developed is a necessary step on the path to a more comprehensive notation for modeling within the paradigm.
- Full Text:
Agents sans frontiers: cross-border aquatic weed biological control in the rivers of southern Mozambique
- Langa, Sílvia da Fátima, Hill, Martin P, Compton, Stephen G
- Authors: Langa, Sílvia da Fátima , Hill, Martin P , Compton, Stephen G
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148998 , vital:38794 , DOI: 10.2989/16085914.2020.1749551
- Description: Biological control is an effective ways of controlling aquatic plants, especially in South Africa. Release of biological control agents has been limited to Mozambique, where water hyacinth (Eichhornia crassipes (Mart.) Solms-Laubach (Pontederiaceae)), water lettuce (Pistia stratiotes L. (Araceae)), red water ferns (Azolla spp. (Azollaceae)) and salvinia (Salvinia molesta DS Mitch. (Salviniaceae)) are significant weeds in the south of the country. In 2009, we assessed the status of these weeds in seven rivers across southern Mozambique and recorded whether any biocontrol agents were present.
- Full Text:
- Authors: Langa, Sílvia da Fátima , Hill, Martin P , Compton, Stephen G
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148998 , vital:38794 , DOI: 10.2989/16085914.2020.1749551
- Description: Biological control is an effective ways of controlling aquatic plants, especially in South Africa. Release of biological control agents has been limited to Mozambique, where water hyacinth (Eichhornia crassipes (Mart.) Solms-Laubach (Pontederiaceae)), water lettuce (Pistia stratiotes L. (Araceae)), red water ferns (Azolla spp. (Azollaceae)) and salvinia (Salvinia molesta DS Mitch. (Salviniaceae)) are significant weeds in the south of the country. In 2009, we assessed the status of these weeds in seven rivers across southern Mozambique and recorded whether any biocontrol agents were present.
- Full Text:
Designing and reporting pictogram research: problems, pitfalls and lessons learnt
- Authors: Dowse, Roslind
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/157083 , vital:40085 , https://doi.org/10.1016/j.sapharm.2020.08.013
- Description: Research describing the design, evaluation or use of pictograms for various health-related applications is receiving increasing attention in the literature. However, recent reviews of this body of literature have commented adversely on the overall quality of the research, highlighting problems with the pictogram design process, as well as calling for improvement in both the methodology and reporting of all aspects of designing, developing, modifying, evaluating and applying pictograms in practice. The heterogeneity in study design, as well as in the interventions and outcomes measured, prevents overall conclusions being drawn about the effectiveness of pictograms on comprehension and medicine-taking behaviour such as adherence and self-care. The reporting of such research should provide adequate detail to enable reproducibility and replicability of the research. This article offers guidance in designing and reporting pictogram-based research, highlighting areas that are often problematic or inadequately addressed.
- Full Text:
- Authors: Dowse, Roslind
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/157083 , vital:40085 , https://doi.org/10.1016/j.sapharm.2020.08.013
- Description: Research describing the design, evaluation or use of pictograms for various health-related applications is receiving increasing attention in the literature. However, recent reviews of this body of literature have commented adversely on the overall quality of the research, highlighting problems with the pictogram design process, as well as calling for improvement in both the methodology and reporting of all aspects of designing, developing, modifying, evaluating and applying pictograms in practice. The heterogeneity in study design, as well as in the interventions and outcomes measured, prevents overall conclusions being drawn about the effectiveness of pictograms on comprehension and medicine-taking behaviour such as adherence and self-care. The reporting of such research should provide adequate detail to enable reproducibility and replicability of the research. This article offers guidance in designing and reporting pictogram-based research, highlighting areas that are often problematic or inadequately addressed.
- Full Text:
Effects of an eight-week lumbar stabilization exercise programme on selected variables of patients with chronic low back pain:
- Abass, Ademola O, Alli, Abiola R, Olagbegi, Oladapo M, Christie, Candice J, Bolarinde, Olufemi S
- Authors: Abass, Ademola O , Alli, Abiola R , Olagbegi, Oladapo M , Christie, Candice J , Bolarinde, Olufemi S
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/150307 , vital:38966 , DOI: https://doi.org/10.3329/bjms.v19i3.45864
- Description: Lumbar stabilisation exercise has been shown to reduce pain and disability in patients with low back pain but information on its potential benefits in term of back muscle endurance is scarce. This study was aimed at investigating the effects of augmenting conventional physiotherapy with lumbar stabilization exercises on selected variables of patients with non-specific chronic low back pain (NSCLBP).
- Full Text:
- Authors: Abass, Ademola O , Alli, Abiola R , Olagbegi, Oladapo M , Christie, Candice J , Bolarinde, Olufemi S
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/150307 , vital:38966 , DOI: https://doi.org/10.3329/bjms.v19i3.45864
- Description: Lumbar stabilisation exercise has been shown to reduce pain and disability in patients with low back pain but information on its potential benefits in term of back muscle endurance is scarce. This study was aimed at investigating the effects of augmenting conventional physiotherapy with lumbar stabilization exercises on selected variables of patients with non-specific chronic low back pain (NSCLBP).
- Full Text:
Gamification of functional programming
- Chifamba, Tavonga D, Motara, Yusuf, M
- Authors: Chifamba, Tavonga D , Motara, Yusuf, M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428996 , vital:72552 , https://ieeexplore.ieee.org/abstract/document/9334096
- Description: This paper looks at the current state of how students learn the functional programming [FP] paradigm and how it can be improved by applying gamification. Multiple related works and research published by experts in the field are analyzed and examined. In conclusion, a possible way forward with regards to functional programming gamification design is proposed.
- Full Text:
- Authors: Chifamba, Tavonga D , Motara, Yusuf, M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428996 , vital:72552 , https://ieeexplore.ieee.org/abstract/document/9334096
- Description: This paper looks at the current state of how students learn the functional programming [FP] paradigm and how it can be improved by applying gamification. Multiple related works and research published by experts in the field are analyzed and examined. In conclusion, a possible way forward with regards to functional programming gamification design is proposed.
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Implantation, orientation and validation of a commercially produced heart-rate logger for use in a perciform teleost fish:
- Muller, Cuen, Childs, Amber-Robyn, Duncan, Murray I, Skeeles, Michael R, James, Nicola C, Van der Walt, Kerry-Ann, Winkler, Alexander C, Potts, Warren M
- Authors: Muller, Cuen , Childs, Amber-Robyn , Duncan, Murray I , Skeeles, Michael R , James, Nicola C , Van der Walt, Kerry-Ann , Winkler, Alexander C , Potts, Warren M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148494 , vital:38744 , doi.org.wam.seals.ac.za/10.1093/conphys/coaa035
- Description: Quantifying how the heart rate of ectothermic organisms responds to environmental conditions (e.g. water temperature) is important information to quantify their sensitivity to environmental change. Heart rate studies have typically been conducted in lab environments where fish are confined. However, commercially available implantable heart rate biologgers provide the opportunity to study free-swimming fish. Our study aimed to determine the applicability of an implantable device, typically used on fusiform-shaped fish (e.g. salmonids), for a perciform fish where morphology and anatomy prevent ventral incisions normally used on fusiform-shaped fish.
- Full Text:
- Authors: Muller, Cuen , Childs, Amber-Robyn , Duncan, Murray I , Skeeles, Michael R , James, Nicola C , Van der Walt, Kerry-Ann , Winkler, Alexander C , Potts, Warren M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148494 , vital:38744 , doi.org.wam.seals.ac.za/10.1093/conphys/coaa035
- Description: Quantifying how the heart rate of ectothermic organisms responds to environmental conditions (e.g. water temperature) is important information to quantify their sensitivity to environmental change. Heart rate studies have typically been conducted in lab environments where fish are confined. However, commercially available implantable heart rate biologgers provide the opportunity to study free-swimming fish. Our study aimed to determine the applicability of an implantable device, typically used on fusiform-shaped fish (e.g. salmonids), for a perciform fish where morphology and anatomy prevent ventral incisions normally used on fusiform-shaped fish.
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Natural hair chronicles of black female vloggers: influences on their psychological well-being
- Jacobs, Liezille, Kelemi, Anelisa
- Authors: Jacobs, Liezille , Kelemi, Anelisa
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158354 , vital:40177 , https://doi.org/10.1080/14330237.2020.1796046
- Description: This study explored how hair texture chronicles in a post-colonial country is influenced by psychological well-being and a sense of self in women. Our informants were 10 female, black, South African YouTube vloggers, with Afro-textured, frizzy, natural hair. The participants completed qualitative descriptions of their hair chronicles with vlogging. Thematic analysis of the data yielded the following themes: (i) untangling the politics of hair, identity, and race through transitioning hair stories; (ii) hair chronicles for psychological well-being; and (iii) empowerment from wearing natural hair.
- Full Text:
- Authors: Jacobs, Liezille , Kelemi, Anelisa
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158354 , vital:40177 , https://doi.org/10.1080/14330237.2020.1796046
- Description: This study explored how hair texture chronicles in a post-colonial country is influenced by psychological well-being and a sense of self in women. Our informants were 10 female, black, South African YouTube vloggers, with Afro-textured, frizzy, natural hair. The participants completed qualitative descriptions of their hair chronicles with vlogging. Thematic analysis of the data yielded the following themes: (i) untangling the politics of hair, identity, and race through transitioning hair stories; (ii) hair chronicles for psychological well-being; and (iii) empowerment from wearing natural hair.
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Optically stimulated luminescence and spectral emission features of radioluminescence and thermoluminescence of natural kunzite:
- Alatishe, M A, Ogundare, F O, Folley, Damilola E, Chithambo, Makaiko L, Chikwembani, S
- Authors: Alatishe, M A , Ogundare, F O , Folley, Damilola E , Chithambo, Makaiko L , Chikwembani, S
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/160478 , vital:40449 , https://doi.org/10.1016/j.radmeas.2020.106457
- Description: Features of luminescence optically stimulated from natural kunzite using 470 nm blue light are reported. Preparatory measurements of its X-ray excited radioluminescence and thermoluminescence show that the sample has two main bands centered at 360 nm and 600 nm. The optically stimulated luminescence discussed in this report was monitored in the UV region and is presumed to be the same 360 nm emission that appears in the radioluminescence and thermoluminescence spectra. The glow curve shows at least three peaks at 74, 202, 432 oC for heating at 1 oC and the third one is a composite of two. Only the first two peaks are deduced to contribute most of the optically stimulated luminescence.
- Full Text:
- Authors: Alatishe, M A , Ogundare, F O , Folley, Damilola E , Chithambo, Makaiko L , Chikwembani, S
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/160478 , vital:40449 , https://doi.org/10.1016/j.radmeas.2020.106457
- Description: Features of luminescence optically stimulated from natural kunzite using 470 nm blue light are reported. Preparatory measurements of its X-ray excited radioluminescence and thermoluminescence show that the sample has two main bands centered at 360 nm and 600 nm. The optically stimulated luminescence discussed in this report was monitored in the UV region and is presumed to be the same 360 nm emission that appears in the radioluminescence and thermoluminescence spectra. The glow curve shows at least three peaks at 74, 202, 432 oC for heating at 1 oC and the third one is a composite of two. Only the first two peaks are deduced to contribute most of the optically stimulated luminescence.
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Post-release monitoring in classical biological control of weeds: higher trophic levels modify competitive interactions between invasive macrophytes
- Schaffner, Urs, Hill, Martin P, Dudley, Tom, D’Antonio, Carla
- Authors: Schaffner, Urs , Hill, Martin P , Dudley, Tom , D’Antonio, Carla
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/150200 , vital:38949 , https://doi.org/10.1016/j.cois.2020.02.008
- Description: While various aspects of classical biological control (CBC) of weeds, including non-target risk assessment, have been continuously improved in the past few decades, post-release monitoring remains neglected and underfunded. Detailed assessments of the population, community and ecosystem outcomes of CBC introductions, including reasons for success/failure and absence or evidence of non-target effects are generally lacking or fragmentary. Here we review recent advances in understanding the demography of biological control agents released into a novel environment, their impact on the target weed and on non-target species, and the consequences for the resident plant and animal communities and ecosystem functioning, including the restoration of ecosystem services. We argue that post-release monitoring of CBC programs offers unique but largely underutilized opportunities to improve our understanding of CBC outcomes and to inform management and decision-makers on when and how CBC should be integrated with other management options to enhance ecosystem restoration.
- Full Text:
- Authors: Schaffner, Urs , Hill, Martin P , Dudley, Tom , D’Antonio, Carla
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/150200 , vital:38949 , https://doi.org/10.1016/j.cois.2020.02.008
- Description: While various aspects of classical biological control (CBC) of weeds, including non-target risk assessment, have been continuously improved in the past few decades, post-release monitoring remains neglected and underfunded. Detailed assessments of the population, community and ecosystem outcomes of CBC introductions, including reasons for success/failure and absence or evidence of non-target effects are generally lacking or fragmentary. Here we review recent advances in understanding the demography of biological control agents released into a novel environment, their impact on the target weed and on non-target species, and the consequences for the resident plant and animal communities and ecosystem functioning, including the restoration of ecosystem services. We argue that post-release monitoring of CBC programs offers unique but largely underutilized opportunities to improve our understanding of CBC outcomes and to inform management and decision-makers on when and how CBC should be integrated with other management options to enhance ecosystem restoration.
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Preliminary study on the potential use of Fly Ash as a Ventilated Improved Pit Latrine Additive:
- Collings, Dylan, Tandlich, Roman, Dube, Cyril S, Madikizela, Phindile, Ngqwala, Nosiphiwe P, Ahmed, Mustaque
- Authors: Collings, Dylan , Tandlich, Roman , Dube, Cyril S , Madikizela, Phindile , Ngqwala, Nosiphiwe P , Ahmed, Mustaque
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/160334 , vital:40436 , https://0-doi.org.wam.seals.ac.za/10.5276/JSWTM/2019.395
- Description: This study describes the results of a series of laboratory experiments on aimed at developing of a protocol for the use of fly ash as a pit additive in the ventilated improved pit latrines (VIPs) in South Africa. Model VIP vaults were prepared in the laboratory and filled with synthetic faecal sludge; and dosed with fly ash in amounts ranging from 5 to 20 % (w/w).
- Full Text:
- Authors: Collings, Dylan , Tandlich, Roman , Dube, Cyril S , Madikizela, Phindile , Ngqwala, Nosiphiwe P , Ahmed, Mustaque
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/160334 , vital:40436 , https://0-doi.org.wam.seals.ac.za/10.5276/JSWTM/2019.395
- Description: This study describes the results of a series of laboratory experiments on aimed at developing of a protocol for the use of fly ash as a pit additive in the ventilated improved pit latrines (VIPs) in South Africa. Model VIP vaults were prepared in the laboratory and filled with synthetic faecal sludge; and dosed with fly ash in amounts ranging from 5 to 20 % (w/w).
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Small scale habitat effects on anthropogenic litter material and sources in a coastal lagoon system:
- Velez, Nadja, Nicastro, Katy R, McQuaid, Christopher D, Zardi, Gerardo I
- Authors: Velez, Nadja , Nicastro, Katy R , McQuaid, Christopher D , Zardi, Gerardo I
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/160489 , vital:40450 , https://doi.org/10.1016/j.marpolbul.2020.111689
- Description: Anthropogenic litter is ubiquitous throughout marine ecosystems, but its abundance and distribution are driven by complex interactions of distinct environmental factors and thus can be extremely heterogeneous. Here we compare the extent of anthropogenic litter pollution at a sheltered lagoon habitat and nearby open coast sites. Monthly surveys over a period of five months showed that both the types and sources of litter always differed significantly between lagoon and open coast sites.
- Full Text:
Small scale habitat effects on anthropogenic litter material and sources in a coastal lagoon system:
- Authors: Velez, Nadja , Nicastro, Katy R , McQuaid, Christopher D , Zardi, Gerardo I
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/160489 , vital:40450 , https://doi.org/10.1016/j.marpolbul.2020.111689
- Description: Anthropogenic litter is ubiquitous throughout marine ecosystems, but its abundance and distribution are driven by complex interactions of distinct environmental factors and thus can be extremely heterogeneous. Here we compare the extent of anthropogenic litter pollution at a sheltered lagoon habitat and nearby open coast sites. Monthly surveys over a period of five months showed that both the types and sources of litter always differed significantly between lagoon and open coast sites.
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Social media and citizen mobilisation in the biometric voter registration (BVR) process in Zimbabwe:
- Authors: Mwonzora, Gift
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/178953 , vital:40104 , https://doi.org/10.1080/02589001.2020.1746753
- Description: Considerable research has, in recent years, focused on the utility of social media platforms in political campaigns in both developed and developing countries, but there has not been significant analysis of social media use in voter registration campaigns. In seeking to address this lacuna in the literature, this article examines the use and efficacy of social media networking sites (SNS), namely Facebook and Twitter, in mobilising, informing and educating citizens to participate in a new system of biometric voter registration implemented in Zimbabwe. The article draws on a qualitative research methodology. The article contends that social media use amplified political knowledge of the Zimbabwean electorate ahead of the 2018 national election as exemplified in the upsurge of voter registrants under the biometric voter registration system.
- Full Text:
Social media and citizen mobilisation in the biometric voter registration (BVR) process in Zimbabwe:
- Authors: Mwonzora, Gift
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/178953 , vital:40104 , https://doi.org/10.1080/02589001.2020.1746753
- Description: Considerable research has, in recent years, focused on the utility of social media platforms in political campaigns in both developed and developing countries, but there has not been significant analysis of social media use in voter registration campaigns. In seeking to address this lacuna in the literature, this article examines the use and efficacy of social media networking sites (SNS), namely Facebook and Twitter, in mobilising, informing and educating citizens to participate in a new system of biometric voter registration implemented in Zimbabwe. The article draws on a qualitative research methodology. The article contends that social media use amplified political knowledge of the Zimbabwean electorate ahead of the 2018 national election as exemplified in the upsurge of voter registrants under the biometric voter registration system.
- Full Text:
Synthesis of pH sensitive dual capped CdTe QDs: their optical properties and structural morphology
- Daramola, Olamide A, Noundou, Xavier S, Nkanga, Christian I, Tseki, Potlaki F, Krause, Rui W M
- Authors: Daramola, Olamide A , Noundou, Xavier S , Nkanga, Christian I , Tseki, Potlaki F , Krause, Rui W M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/156364 , vital:39983 , https://doi.org/10.1007/s10895-020-02526-x
- Description: We herein report five different types of thiol dual capped cadmium tellurite quantum dots (CdTe QDs) namely glutathionemercapto-propanoic acid (QD 1), glutathione-thiolglycolic acid (QD 2), L-cysteine-mercapto-propanoic acid (QD 3), L-cysteinethiol-glycolic acid (QD 4) and mercapto-propanoic acid-thiol-glycolic (QD 5). Dual-capped CdTe QDs were prepared using a one pot synthetic method. Cadmium acetate and sodium tellurite were respectively used as cadmium and tellurium precursors. Photo-physical properties of the synthesized QDs were examined using UV-Vis and photoluminescence spectroscopy while structural characterization was performed by means of transmission electron microscopy (TEM) and Fourier transform infrared (FTIR) spectroscopy.
- Full Text:
- Authors: Daramola, Olamide A , Noundou, Xavier S , Nkanga, Christian I , Tseki, Potlaki F , Krause, Rui W M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/156364 , vital:39983 , https://doi.org/10.1007/s10895-020-02526-x
- Description: We herein report five different types of thiol dual capped cadmium tellurite quantum dots (CdTe QDs) namely glutathionemercapto-propanoic acid (QD 1), glutathione-thiolglycolic acid (QD 2), L-cysteine-mercapto-propanoic acid (QD 3), L-cysteinethiol-glycolic acid (QD 4) and mercapto-propanoic acid-thiol-glycolic (QD 5). Dual-capped CdTe QDs were prepared using a one pot synthetic method. Cadmium acetate and sodium tellurite were respectively used as cadmium and tellurium precursors. Photo-physical properties of the synthesized QDs were examined using UV-Vis and photoluminescence spectroscopy while structural characterization was performed by means of transmission electron microscopy (TEM) and Fourier transform infrared (FTIR) spectroscopy.
- Full Text:
The Northern Cross fast radio burst project–I: overview and pilot observations at 408 MHz
- Locatelli, Nicola T, Bernardi, Gianni, Bianchi, Germano, Chiello, Riccardo C, Magro, Alessio, Naldi, Giovanni, Pilia, Maura, Pupillo, Giuseppe, Ridolfi, Alessandro, Setti, Giancarlo, Vazza, Franco
- Authors: Locatelli, Nicola T , Bernardi, Gianni , Bianchi, Germano , Chiello, Riccardo C , Magro, Alessio , Naldi, Giovanni , Pilia, Maura , Pupillo, Giuseppe , Ridolfi, Alessandro , Setti, Giancarlo , Vazza, Franco
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148791 , vital:38774 , https://0-doi.org.wam.seals.ac.za/10.1093/mnras/staa813
- Description: Fast radio bursts (FRBs) remain one of the most enigmatic astrophysical sources. Observations have significantly progressed over the last few years, due to the capabilities of new radio telescopes and the refurbishment of existing ones. Here, we describe the upgrade of the Northern Cross radio telescope, operating in the 400–416 MHz frequency band, with the ultimate goal of turning the array into a dedicated instrument to survey the sky for FRBs.
- Full Text:
- Authors: Locatelli, Nicola T , Bernardi, Gianni , Bianchi, Germano , Chiello, Riccardo C , Magro, Alessio , Naldi, Giovanni , Pilia, Maura , Pupillo, Giuseppe , Ridolfi, Alessandro , Setti, Giancarlo , Vazza, Franco
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148791 , vital:38774 , https://0-doi.org.wam.seals.ac.za/10.1093/mnras/staa813
- Description: Fast radio bursts (FRBs) remain one of the most enigmatic astrophysical sources. Observations have significantly progressed over the last few years, due to the capabilities of new radio telescopes and the refurbishment of existing ones. Here, we describe the upgrade of the Northern Cross radio telescope, operating in the 400–416 MHz frequency band, with the ultimate goal of turning the array into a dedicated instrument to survey the sky for FRBs.
- Full Text:
The Thousand-Pulsar-Array programme on MeerKAT–I: science objectives and first results
- Johnston, Simon, Karastergiou, A, Keith, M J, Song, X, Weltevrede, P, Abbate, F, Bailes, M, Buchner, S, Camilo, F, Geyer, M, Hugo, B, Jameson, A, Kramer, M, Parthasarathy, A, Reardon, D J, Ridolfi A, Serylak, M, Shannon, R M, Spiewak, R, Van Straten, W, Venkatraman Krishnan, V, Jankowski, F, Meyers, B W, Oswald , L, Posselt, B, Sobey, C, Szary, A, Van Leeuwen, J
- Authors: Johnston, Simon , Karastergiou, A , Keith, M J , Song, X , Weltevrede, P , Abbate, F , Bailes, M , Buchner, S , Camilo, F , Geyer, M , Hugo, B , Jameson, A , Kramer, M , Parthasarathy, A , Reardon, D J , Ridolfi A , Serylak, M , Shannon, R M , Spiewak, R , Van Straten, W , Venkatraman Krishnan, V , Jankowski, F , Meyers, B W , Oswald , L , Posselt, B , Sobey, C , Szary, A , Van Leeuwen, J
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148814 , vital:38776 , https://0-doi.org.wam.seals.ac.za/10.1093/mnras/staa516
- Description: We report here on initial results from the Thousand-Pulsar-Array (TPA) programme, part of the Large Survey Project ‘MeerTime’ on the MeerKAT telescope. The interferometer is used in the tied-array mode in the band from 856 to 1712 MHz, and the wide band coupled with the large collecting area and low receiver temperature make it an excellent telescope for the study of radio pulsars. The TPA is a 5 year project, which aims at to observing (a) more than 1000 pulsars to obtain high-fidelity pulse profiles, (b) some 500 of these pulsars over multiple epochs, and (c) long sequences of single-pulse trains from several hundred pulsars.
- Full Text:
- Authors: Johnston, Simon , Karastergiou, A , Keith, M J , Song, X , Weltevrede, P , Abbate, F , Bailes, M , Buchner, S , Camilo, F , Geyer, M , Hugo, B , Jameson, A , Kramer, M , Parthasarathy, A , Reardon, D J , Ridolfi A , Serylak, M , Shannon, R M , Spiewak, R , Van Straten, W , Venkatraman Krishnan, V , Jankowski, F , Meyers, B W , Oswald , L , Posselt, B , Sobey, C , Szary, A , Van Leeuwen, J
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148814 , vital:38776 , https://0-doi.org.wam.seals.ac.za/10.1093/mnras/staa516
- Description: We report here on initial results from the Thousand-Pulsar-Array (TPA) programme, part of the Large Survey Project ‘MeerTime’ on the MeerKAT telescope. The interferometer is used in the tied-array mode in the band from 856 to 1712 MHz, and the wide band coupled with the large collecting area and low receiver temperature make it an excellent telescope for the study of radio pulsars. The TPA is a 5 year project, which aims at to observing (a) more than 1000 pulsars to obtain high-fidelity pulse profiles, (b) some 500 of these pulsars over multiple epochs, and (c) long sequences of single-pulse trains from several hundred pulsars.
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