The negative molecular swab does not mean that the body and mind are healed: even months after Sars-CoV-2 infection, patients may continue to have symptoms. The symptoms mainly present at 6 - 12 months in patients rec...The negative molecular swab does not mean that the body and mind are healed: even months after Sars-CoV-2 infection, patients may continue to have symptoms. The symptoms mainly present at 6 - 12 months in patients recovered from COVID-19 are: asthenia, breathlessness, difficulty in breathing deeply, myalgia, psychological disorders and difficulty in concentrating such as “brain fog”. The study was conducted from June 2021 to July 2021 at Health Prevention Department in Benevento (Campania Region, South Italy). 133 patients accepted the questionnaire in the form of a telephone interview. The purpose of this study is precisely to highlight how, although a year after infection, a number of patients still show post-COVID symptoms. In particular, 77 out of 133 positive patients became Long-Haulers (58%).展开更多
Here we summarize multi-terabit long-haul transmission experiment and distributed Raman amplification (DRA) technologies. As well, we investigate the configuration of dispersion-managed fibers for the DRA-based system...Here we summarize multi-terabit long-haul transmission experiment and distributed Raman amplification (DRA) technologies. As well, we investigate the configuration of dispersion-managed fibers for the DRA-based system from the viewpoint of the fiber non-linear effect and required pumping power.展开更多
This paper reviews the recent advances in multi-terabit long-haul transmission technologies for terrestrial optical networks. The use of high performance new fibres, low-noise Raman amplification, optimised modulation...This paper reviews the recent advances in multi-terabit long-haul transmission technologies for terrestrial optical networks. The use of high performance new fibres, low-noise Raman amplification, optimised modulation formats, and forward error correction is shown to be effective for capacity and distance expansion.展开更多
Fiber-optic hydrophone (FOH) is a significant type of acoustic sensor, which can be used in both military and civilian fields such as underwater target detection, oil and natural gas prospecting, and earthquake inspec...Fiber-optic hydrophone (FOH) is a significant type of acoustic sensor, which can be used in both military and civilian fields such as underwater target detection, oil and natural gas prospecting, and earthquake inspection. The recent progress of FOH is introduced from five aspects, including large-scale FOH array, very-low-frequency detection, fiber-optic vector hydrophone (FOVH), towed linear array, and deep-sea and long-haul transmission. The above five aspects indicate the future development trends in the FOH research field, and they also provide a guideline for the practical applications of FOH as well as its array.展开更多
文摘The negative molecular swab does not mean that the body and mind are healed: even months after Sars-CoV-2 infection, patients may continue to have symptoms. The symptoms mainly present at 6 - 12 months in patients recovered from COVID-19 are: asthenia, breathlessness, difficulty in breathing deeply, myalgia, psychological disorders and difficulty in concentrating such as “brain fog”. The study was conducted from June 2021 to July 2021 at Health Prevention Department in Benevento (Campania Region, South Italy). 133 patients accepted the questionnaire in the form of a telephone interview. The purpose of this study is precisely to highlight how, although a year after infection, a number of patients still show post-COVID symptoms. In particular, 77 out of 133 positive patients became Long-Haulers (58%).
文摘Here we summarize multi-terabit long-haul transmission experiment and distributed Raman amplification (DRA) technologies. As well, we investigate the configuration of dispersion-managed fibers for the DRA-based system from the viewpoint of the fiber non-linear effect and required pumping power.
文摘This paper reviews the recent advances in multi-terabit long-haul transmission technologies for terrestrial optical networks. The use of high performance new fibres, low-noise Raman amplification, optimised modulation formats, and forward error correction is shown to be effective for capacity and distance expansion.
基金The authors would like to acknowledge the support of the National Natural Science Foundation of China(Grant Nos.61775238,61705263,and 61705262).
文摘Fiber-optic hydrophone (FOH) is a significant type of acoustic sensor, which can be used in both military and civilian fields such as underwater target detection, oil and natural gas prospecting, and earthquake inspection. The recent progress of FOH is introduced from five aspects, including large-scale FOH array, very-low-frequency detection, fiber-optic vector hydrophone (FOVH), towed linear array, and deep-sea and long-haul transmission. The above five aspects indicate the future development trends in the FOH research field, and they also provide a guideline for the practical applications of FOH as well as its array.
