The Experts below are selected from a list of 6447 Experts worldwide ranked by ideXlab platform

S Ariyavisitakul - One of the best experts on this subject based on the ideXlab platform.

  • equalization of a hard limited slowly fading multipath signal using a phase equalizer with time reversal structure
    IEEE Journal on Selected Areas in Communications, 1992
    Co-Authors: S Ariyavisitakul
    Abstract:

    Describes a low-complexity equalization technique for improving the reliability of Portable Radio links in the presence of multipath time delay spread. A technique that operates on hard-limited received signals, with only the phase information available, is presented. Suboptimum receivers based on a maximum likelihood estimation criterion are discussed, including a sequence estimator and a decision feedback phase detector. A low-complexity adaptive phase equalizer structure using decision-directed phase tracking is proposed. The equalizer does not require the multiplication operations required in most conventional equalization algorithms. The author also proposes a receiver that includes a time-reversal structure and a joint estimator for optimum timing recovery and equalizer training. The time-reversal structure plays a crucial role in maximizing the compensation capability of the phase equalizer. The combined use of phase equalization and diversity reception is also considered. >

Ovidio Michaël - One of the best experts on this subject based on the ideXlab platform.

  • What happens to glass eels after restocking in upland rivers? A long‐term study on their dispersal and behavioural traits
    2019
    Co-Authors: Nzau Matondo Billy, Séleck Emilie, Dierckx Arnaud, Benitez Jean-philippe, Rollin Xavier, Ovidio Michaël
    Abstract:

    The European eel Anguilla anguilla is a critically endangered fish species as a result of human activities and climate change in river and oceanic ecosystems. Restocking using glass eels in continental freshwater areas is a potential conservation measure for enhancing local eel stocks and for conserving the species in aquatic habitats, where it may otherwise disappear. However, little is known about the fate of these restocked individuals and the early ecological behaviour of the young eels translocated in rivers.A Portable Radio‐frequency identification (RFID) telemetry system and 12‐mm tags were used to track restocked eels for a duration of 4 years. The aim was to understand the early movement, behavioural traits, dispersal, and habitat use of elvers after restocking performed in 2013 with glass eels in a shallow riverine environment.From the 241 tagged eels (total length, Q50 = 152 mm), 85% were detected in 1968 positions during a period of 4 years, beginning in 2014. Clear seasonality in eel activity was observed, with higher mobility in summer when the water temperature was high (above 12°C). Dispersal was slowed by numerous artificial obstacles and the high carrying capacity of habitats. There was a negative relationship between the body size of eels at tagging and their mobility. Five behavioural categories of mobility patterns were identified: ascending, descending, oscillating with an upstream trend, oscillating with a downstream trend, and stationary. The first four categories depleted with time, in favour of stationary individuals that displayed a highly sedentary lifestyle.This study provides new knowledge of the long‐term dispersal behaviour of restocked eels and the influence of seasons, barriers, and habitats on their colonization strategy changing with time. The results contribute to a better understanding of the issue of uncommon restocking practices in upland rivers.Peer reviewe

  • What happens to glass eels after restocking in upland rivers? A long‐term study on their dispersal and behavioural traits
    'Wiley', 2019
    Co-Authors: Nzau Matondo Billy, Séleck Emilie, Dierckx Arnaud, Benitez Jean-philippe, Rollin Xavier, Ovidio Michaël
    Abstract:

    peer reviewedaudience: researcher, professional, studentThe European eel Anguilla anguilla is a critically endangered fish species as a result of human activities and climate change in river and oceanic ecosystems. Restocking using glass eels in continental freshwater areas is a potential conservation measure for enhancing local eel stocks and for conserving the species in aquatic habitats, where it may otherwise disappear. However, little is known about the fate of these restocked individuals and the early ecological behaviour of the young eels translocated in rivers.A Portable Radio‐frequency identification (RFID) telemetry system and 12‐mm tags were used to track restocked eels for a duration of 4 years. The aim was to understand the early movement, behavioural traits, dispersal, and habitat use of elvers after restocking performed in 2013 with glass eels in a shallow riverine environment.From the 241 tagged eels (total length, Q50 = 152 mm), 85% were detected in 1968 positions during a period of 4 years, beginning in 2014. Clear seasonality in eel activity was observed, with higher mobility in summer when the water temperature was high (above 12°C). Dispersal was slowed by numerous artificial obstacles and the high carrying capacity of habitats. There was a negative relationship between the body size of eels at tagging and their mobility. Five behavioural categories of mobility patterns were identified: ascending, descending, oscillating with an upstream trend, oscillating with a downstream trend, and stationary. The first four categories depleted with time, in favour of stationary individuals that displayed a highly sedentary lifestyle.This study provides new knowledge of the long‐term dispersal behaviour of restocked eels and the influence of seasons, barriers, and habitats on their colonization strategy changing with time. The results contribute to a better understanding of the issue of uncommon restocking practices in upland rivers

  • What happens to glass eels after restocking in upland rivers? A long‐term study on their dispersal and behavioural traits
    'Wiley', 2019
    Co-Authors: Nzau Matondo Billy, Séleck Emilie, Dierckx Arnaud, Benitez Jean-philippe, Rollin Xavier, Ovidio Michaël
    Abstract:

    The European eel Anguilla anguilla is a critically endangered fish species as a result of human activities and climate change in river and oceanic ecosystems. Restocking using glass eels in continental freshwater areas is a potential conservation measure for enhancing local eel stocks and for conserving the species in aquatic habitats, where it may otherwise disappear. However, little is known about the fate of these restocked individuals and the early ecological behaviour of the young eels translocated in rivers.A Portable Radio‐frequency identification (RFID) telemetry system and 12‐mm tags were used to track restocked eels for a duration of 4 years. The aim was to understand the early movement, behavioural traits, dispersal, and habitat use of elvers after restocking performed in 2013 with glass eels in a shallow riverine environment.From the 241 tagged eels (total length, Q50 = 152 mm), 85% were detected in 1968 positions during a period of 4 years, beginning in 2014. Clear seasonality in eel activity was observed, with higher mobility in summer when the water temperature was high (above 12°C). Dispersal was slowed by numerous artificial obstacles and the high carrying capacity of habitats. There was a negative relationship between the body size of eels at tagging and their mobility. Five behavioural categories of mobility patterns were identified: ascending, descending, oscillating with an upstream trend, oscillating with a downstream trend, and stationary. The first four categories depleted with time, in favour of stationary individuals that displayed a highly sedentary lifestyle.This study provides new knowledge of the long‐term dispersal behaviour of restocked eels and the influence of seasons, barriers, and habitats on their colonization strategy changing with time. The results contribute to a better understanding of the issue of uncommon restocking practices in upland rivers

Diego F. Coral - One of the best experts on this subject based on the ideXlab platform.

  • Designing a Portable Radiofrequency source for magnetic hyperthermia applications
    arXiv: Medical Physics, 2020
    Co-Authors: Christian Calvache, Jenny Mera-córdoba, Diego F. Coral
    Abstract:

    In the 21st century, new and alternative non-Radioactive methods for cancer treatment have been developed. One of this is magnetic hyperthermia (MH), which is based on the ability of magnetic nanoparticles (MNP) to transduce electromagnetic energy into heat. If MNP are inside cancer cells, heat induces cells death. The success of HM as cancer therapy depends on two factors, first, the NPM properties and second, the frequency and amplitude of the Radio frequency (RF) applied field. Therefore, in this work a design of a Portable Radio frequency source for magnetic hyperthermia experiments is presented. The design consists of two parts, the first part corresponds to the RF source composed by a RLC parallel circuit, the capacity and inductance values have been chosen in order to achieve the RF range of frequency, and the second part corresponds to the design of a magnetization sensor circuit. While the first circuit produces the RF field, the second circuit serves as a detector of the NPM induced magnetization. The development of this Radiofrequency source makes it possible to determine the applicability of an NPM system in the treatment of cancer by magnetic hyperthermia, opening doors for future research focused on the application of nanotechnology in biomedicine.

Nzau Matondo Billy - One of the best experts on this subject based on the ideXlab platform.

  • What happens to glass eels after restocking in upland rivers? A long‐term study on their dispersal and behavioural traits
    2019
    Co-Authors: Nzau Matondo Billy, Séleck Emilie, Dierckx Arnaud, Benitez Jean-philippe, Rollin Xavier, Ovidio Michaël
    Abstract:

    The European eel Anguilla anguilla is a critically endangered fish species as a result of human activities and climate change in river and oceanic ecosystems. Restocking using glass eels in continental freshwater areas is a potential conservation measure for enhancing local eel stocks and for conserving the species in aquatic habitats, where it may otherwise disappear. However, little is known about the fate of these restocked individuals and the early ecological behaviour of the young eels translocated in rivers.A Portable Radio‐frequency identification (RFID) telemetry system and 12‐mm tags were used to track restocked eels for a duration of 4 years. The aim was to understand the early movement, behavioural traits, dispersal, and habitat use of elvers after restocking performed in 2013 with glass eels in a shallow riverine environment.From the 241 tagged eels (total length, Q50 = 152 mm), 85% were detected in 1968 positions during a period of 4 years, beginning in 2014. Clear seasonality in eel activity was observed, with higher mobility in summer when the water temperature was high (above 12°C). Dispersal was slowed by numerous artificial obstacles and the high carrying capacity of habitats. There was a negative relationship between the body size of eels at tagging and their mobility. Five behavioural categories of mobility patterns were identified: ascending, descending, oscillating with an upstream trend, oscillating with a downstream trend, and stationary. The first four categories depleted with time, in favour of stationary individuals that displayed a highly sedentary lifestyle.This study provides new knowledge of the long‐term dispersal behaviour of restocked eels and the influence of seasons, barriers, and habitats on their colonization strategy changing with time. The results contribute to a better understanding of the issue of uncommon restocking practices in upland rivers.Peer reviewe

  • What happens to glass eels after restocking in upland rivers? A long‐term study on their dispersal and behavioural traits
    'Wiley', 2019
    Co-Authors: Nzau Matondo Billy, Séleck Emilie, Dierckx Arnaud, Benitez Jean-philippe, Rollin Xavier, Ovidio Michaël
    Abstract:

    peer reviewedaudience: researcher, professional, studentThe European eel Anguilla anguilla is a critically endangered fish species as a result of human activities and climate change in river and oceanic ecosystems. Restocking using glass eels in continental freshwater areas is a potential conservation measure for enhancing local eel stocks and for conserving the species in aquatic habitats, where it may otherwise disappear. However, little is known about the fate of these restocked individuals and the early ecological behaviour of the young eels translocated in rivers.A Portable Radio‐frequency identification (RFID) telemetry system and 12‐mm tags were used to track restocked eels for a duration of 4 years. The aim was to understand the early movement, behavioural traits, dispersal, and habitat use of elvers after restocking performed in 2013 with glass eels in a shallow riverine environment.From the 241 tagged eels (total length, Q50 = 152 mm), 85% were detected in 1968 positions during a period of 4 years, beginning in 2014. Clear seasonality in eel activity was observed, with higher mobility in summer when the water temperature was high (above 12°C). Dispersal was slowed by numerous artificial obstacles and the high carrying capacity of habitats. There was a negative relationship between the body size of eels at tagging and their mobility. Five behavioural categories of mobility patterns were identified: ascending, descending, oscillating with an upstream trend, oscillating with a downstream trend, and stationary. The first four categories depleted with time, in favour of stationary individuals that displayed a highly sedentary lifestyle.This study provides new knowledge of the long‐term dispersal behaviour of restocked eels and the influence of seasons, barriers, and habitats on their colonization strategy changing with time. The results contribute to a better understanding of the issue of uncommon restocking practices in upland rivers

  • What happens to glass eels after restocking in upland rivers? A long‐term study on their dispersal and behavioural traits
    'Wiley', 2019
    Co-Authors: Nzau Matondo Billy, Séleck Emilie, Dierckx Arnaud, Benitez Jean-philippe, Rollin Xavier, Ovidio Michaël
    Abstract:

    The European eel Anguilla anguilla is a critically endangered fish species as a result of human activities and climate change in river and oceanic ecosystems. Restocking using glass eels in continental freshwater areas is a potential conservation measure for enhancing local eel stocks and for conserving the species in aquatic habitats, where it may otherwise disappear. However, little is known about the fate of these restocked individuals and the early ecological behaviour of the young eels translocated in rivers.A Portable Radio‐frequency identification (RFID) telemetry system and 12‐mm tags were used to track restocked eels for a duration of 4 years. The aim was to understand the early movement, behavioural traits, dispersal, and habitat use of elvers after restocking performed in 2013 with glass eels in a shallow riverine environment.From the 241 tagged eels (total length, Q50 = 152 mm), 85% were detected in 1968 positions during a period of 4 years, beginning in 2014. Clear seasonality in eel activity was observed, with higher mobility in summer when the water temperature was high (above 12°C). Dispersal was slowed by numerous artificial obstacles and the high carrying capacity of habitats. There was a negative relationship between the body size of eels at tagging and their mobility. Five behavioural categories of mobility patterns were identified: ascending, descending, oscillating with an upstream trend, oscillating with a downstream trend, and stationary. The first four categories depleted with time, in favour of stationary individuals that displayed a highly sedentary lifestyle.This study provides new knowledge of the long‐term dispersal behaviour of restocked eels and the influence of seasons, barriers, and habitats on their colonization strategy changing with time. The results contribute to a better understanding of the issue of uncommon restocking practices in upland rivers

Christian Calvache - One of the best experts on this subject based on the ideXlab platform.

  • Designing a Portable Radiofrequency source for magnetic hyperthermia applications
    arXiv: Medical Physics, 2020
    Co-Authors: Christian Calvache, Jenny Mera-córdoba, Diego F. Coral
    Abstract:

    In the 21st century, new and alternative non-Radioactive methods for cancer treatment have been developed. One of this is magnetic hyperthermia (MH), which is based on the ability of magnetic nanoparticles (MNP) to transduce electromagnetic energy into heat. If MNP are inside cancer cells, heat induces cells death. The success of HM as cancer therapy depends on two factors, first, the NPM properties and second, the frequency and amplitude of the Radio frequency (RF) applied field. Therefore, in this work a design of a Portable Radio frequency source for magnetic hyperthermia experiments is presented. The design consists of two parts, the first part corresponds to the RF source composed by a RLC parallel circuit, the capacity and inductance values have been chosen in order to achieve the RF range of frequency, and the second part corresponds to the design of a magnetization sensor circuit. While the first circuit produces the RF field, the second circuit serves as a detector of the NPM induced magnetization. The development of this Radiofrequency source makes it possible to determine the applicability of an NPM system in the treatment of cancer by magnetic hyperthermia, opening doors for future research focused on the application of nanotechnology in biomedicine.