Cablevision (United States)

This paper investigates advanced stacked and interleaved DSCM architectures for 100G and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$200 G$</tex> coherent-PONs, achieving single wavelength bi-directional transmissions with low backreflection. Spectral efficiency is optimized via comparative analysis of subcarrier spacing and roll-off factors.

Theodore C. Baim was an amateur botanist who spent most of his adult life documenting and collecting the flora of Schenectady County, New York, between 1937 and 1990. We have transcribed his handwritten flora to serve as a baseline for future floristic work in the county. We also examined and transcribed the label data from thousands of specimens he collected throughout the county and documented in his flora and confirmed their presence in herbaria. Even though it is the second smallest county in the state outside of New York City (after Rockland County), Schenectady County has a very diverse landscape from pine barrens in the east to a black spruce-tamarack bog in the west. It also has a long history of disturbance by farming and urbanization, as well as important transportation corridors, which have resulted in a flora with 29% exotic species. The vouchered vascular flora consists of 1,222 taxa within 466 genera and 133 families. The five largest families are the Asteraceae, Cyperaceae, Poaceae, Rosaceae, and Fabaceae. The largest genera are Carex, Viola, Solidago, Salix, and Symphyotrichum. Twenty species are listed as endangered, threatened, or rare, but some have not been seen in decades. We encourage others to check on Baim's unvouchered observations and literature citations to add to the flora so it can be updated to understand trends and changes.

Seventy-five years ago, visionaries in the field of reliability engineering came together to establish the IEEE Reliability Society, marking the commencement of a remarkable journey toward enhancing the dependability, resilience, and security of technological systems. As we celebrate this significant milestone, it is an opportune moment to reflect on the society's illustrious history, achievements, and the enduring impact it has had on the world of technology.

Este trabajo es un análisis documental descriptivo que realiza un estudio comparativo entre el Pensamiento Computacional, la Indagación y la Modelización, proponiendo nuevas acepciones para así conformar un marco conceptual que pueda facilitar el desarrollo de actividades y proyectos educativos en el área de las ciencias. Dado el éxito de las Enseñanza de las Ciencias Basada en Indagación (IBSE, Inquiry-Based Science Education) y la demanda actual de una sociedad más digitalmente alfabetizada, se considera necesario definir las citadas metodologías y conocer sus principales componentes, características y habilidades que desempeñan para saber cómo convergen y se articulan, facilitando así su implementación y coexistencia. Los resultados de este análisis sugieren una gran afinidad y grado de solapamiento entre estos tres conceptos donde el uso de modelos se sitúa como uno de los ejes principales para su desarrollo en las aulas de ciencias.

We present a novel 100 Gb/s coherent time-and-frequency-division multiplexing (TFDM) PON with novel design of burst mode transmitting and receiving DSP process. Each of the TFDM digital subcarrier offers burst signal generation and reception and can be operated independently with great architectural flexibility. A double-correlation algorithm is employed for TFDM upstream burst preamble synchronization. The proposed schemes and DSP algorithms are verified and the system performance is successfully evaluated by experimental demonstration of a 100 Gb/s coherent PON architecture with 4×25G TFDM subcarriers over an optical distribution network (ODN) that consists of 50-km fiber transmission and a 1×32 passive power split.

The study's aim is to investigate the efficacy and safety of SOM3355 (bevantolol hydrochloride), a β1 -adrenoreceptor antagonist with recently identified vesicular monoamine transporter type 2 inhibitory properties, as a repositioned treatment to reduce chorea in Huntington's disease (HD). A randomized, placebo-controlled proof-of-concept study was performed in 32 HD patients allocated to 2 arms of 4 sequential 6-week periods each. Patients received placebo and SOM3355 at 100 and 200 mg twice daily in a crossover design. The primary endpoint was improvement by at least 2 points in the total maximal chorea score in any active drug period compared with the placebo period. The primary endpoint was met in 57.1% of the patients. Improvements ≥3, ≥4, ≥5 and ≥6 points vs. placebo treatment were observed in 28.6, 25.0, 17.9 and 10.7% of the patients, respectively. A mixed-model analysis found a significant improvement in the total maximal chorea score of -1.14 (95% confidence interval, -2.11 to -0.16; P= .0224) with 200 mg twice daily SOM3355 treatment compared with placebo treatment. These results were paralleled by Clinical and Patient Global Impression of Change ratings (secondary endpoints). An elevation in plasma prolactin levels by 1.7-1.9-fold was recorded (P< .005), probably reflecting the effect on the dopamine pathway, consistent with vesicular monoamine transporter type 2 inhibition. The most frequent adverse events during SOM3355 administration were mild to moderate. Within the limits of this study, the results suggest that SOM3355 reduces chorea in patients with HD and is well-tolerated. Larger studies are necessary to confirm its therapeutic utility as an antichoreic drug. EudraCT number: 2018-000203-16 and ClinicalTrials.gov Identifier: NCT03575676.

The measurement of PD(Partial Discharge) plays a major role in the assessment of the cable system's condition. The PD test applied to the power cable system is generally performed in short-term. However, since PD has physical characteristics of irregularly repeating occurrence and extinction, there is a possibility that even if a PD test is applied to a defective cable system, it cannot be detected. Therefore, the long-term PD test is necessary. In this work, on-load PD measurement was performed at AC 22.9kV power cable terminations. PD was measured on the high frequency band using inductive sensor attached on termination, and monitored for 14days. The result shows that PD was measured at one of the measurement points, and it was observed that occurrence and extinction were repeated irregularly. To verify the PD test result, X-ray test was taken and internal defect was found. After those non-destructive inspections, dismantlement of termination was performed and the exact coincided with the result of PD test. Based on this result, this PD measurement and analysis could be effective solution to assess condition of cable termination.

Distributed acoustic sensing (DAS) delivers real-time observation ofphysical perturbations such as vibrations or strain variations in conventional optical fibers with high sensitivity. The high density of sensing points and large network footprint provided by a single DAS system, along with the availability of a vast optical fiber network already deployed both in land and in oceanic regions, contrast with the high deployment and maintenance cost of conventional instrumentation networks for seismology. This situation has triggered a rapid growth of DAS deployments for seismic monitoring in recent years. Photonic engineers and geophysicists have joined efforts to prove the value of optical fibers as distributed seismometers, which has resulted in a wide panoply of tests demonstrating diverse applicability across the geosciences. For example, DAS has been successfully applied recording local to teleseismic earthquakes, monitoring glacial icequakes, and observing oceanographic phenomena at the sea floor. Most of the realized tests have been performed using commercially available optical fiber interrogators based on phase-sensitive optical time-domain reflectometry. Among them, DAS based on chirped pulse distributed acoustic sensing have provided optimized performance in terms of both range and sensitivity, particularly at low frequencies. In this communication, we provide a comprehensive review of the current situation of DAS for seismology applications, focusing on near surface monitoring, where already deployed optical fibers can be repurposed as sensor networks.

Abstract A guide to the deployment of global quantum key distribution (QKD) networks by using three different QKD technologies is proposed, including terrestrial QKD via optical fibers, airborne QKD via free-space optics, and spaceborne QKD based on satellites. We review the systems and methods of these QKD technologies and compare their pros and cons, in terms of channel loss, interference, distance limit, connectivity topology, deployment cost, and application scenarios. Technical criteria and deployment strategies are developed for each technology to provide global coverage of QKD networks, including intercontinental, long-haul, metro, and access networks.KeywordsQuantum key distributionSatellite QKDTerrestrial QKD

We propose and experimentally demonstrate a converged optical-wireless WDM access network architecture enabled by a highly integrated quantum dot coherent comb laser. The converged optical-wireless WDM network features simultaneous delivery of coherent and millimeter wave (mmWave) / citizens broadband radio service (CBRS) signals over 50-km and 20 km fiber links, respectively.