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Copyright of Revista Española de Documentación Científica is the property of Consejo Superior de Investigaciones Cientificas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The existing relay protections for line‐commutated converter (LCC)‐ultra high voltage DC (UHVDC) transmission lines are insufficient in protection sensitivity and operation speed. The travelling wavefront fault distance information can be used to improve protection performance, which has been used in protection of voltage source converter ‐high voltage DC (HVDC) transmission lines. The adaptability of travelling wavefront protection in LCC‐UHVDC transmission line is analyzed in this paper. First, the conditions that need to be met for the travelling wavefront protections to be able to effectively recognize faults are analyzed. Eight applicability conditions of wavefront protection are revealed from the perspective of travelling wavefront generation and practical application requirements. Then the degree of match between the applicability conditions and the conditions of LCC‐UHVDC system is analyzed as a basis for assessing the adaptability of travelling wavefront protection in the LCC‐UHVDC system. It is pointed out that the index coefficient‐based wavefront protections are not available for LCC‐UHVDC transmission lines since the hardware sampling rate of protection device is insufficient, while first peak time of transient voltage (FPTV)‐based wavefront protection is available for LCC‐UHVDC transmission lines if it has enough anti‐noise ability. Finally, an enhanced anti‐noise algorithm is proposed for the FPTV‐based travelling wavefront protection. The adaptability of the travelling wavefront protection is verified by hardware‐in‐the‐loop test and filed recording experimental data. [ABSTRACT FROM AUTHOR]

Mechanical defects and partial discharge (PD) defects can appear in the indoor switchgear of substations or distribution stations, making the switchgear a safety hazard. However, traditional acoustic methods detect and identify these two types of defects separately, ignoring the general recognition of audio signals. In addition, the process of using testing equipment is complex and costly, which is not conducive to timely testing and widespread application. To assist technicians in making a quick preliminary diagnosis of defect types for switchgear, improve the efficiency of the subsequent overhaul, and reduce the cost of detection, this paper proposes a general audio recognition method for identifying defects in switchgear using a smartphone. Using this method, we can analyze and identify audio and video files recorded with smartphones and synchronously distinguish background noise, mechanical vibration, and PD audio signals, which have good applicability within a certain range. When testing the feasibility of using smartphones to identify three types of audio signal, through characterizing 12 sets of live audio and video files provided by technicians, it was found that there were similarities and differences in these characteristics, such as the autocorrelation, density, and steepness of the waveforms in the time domain, and the band energy and harmonic components of the frequency spectrum, and new combinations of features were proposed as applicable. To compare the recognition performance for features in the time domain, frequency band energy, Mel-frequency cepstral coefficient (MFCC), and this method, feature vectors were input into a support vector machine (SVM) for a recognition test, and the recognition results showed that the the present method had the highest recognition accuracy. Finally, a set of mechanical defects and PD defects were set up for a switchgear, for practical verification, which proved that this method was general and effective. [ABSTRACT FROM AUTHOR]

The Sequence Alignment/Map (SAM) format file is the text file used to record alignment information. Alignment is the core of sequencing analysis, and downstream tasks accept mapping results for further processing. Given the rapid development of the sequencing industry today, a comprehensive understanding of the SAM format and related tools is necessary to meet the challenges of data processing and analysis. This paper is devoted to retrieving knowledge in the broad field of SAM. First, the format of SAM is introduced to understand the overall process of the sequencing analysis. Then, existing work is systematically classified in accordance with generation, compression and application, and the involved SAM tools are specifically mined. Lastly, a summary and some thoughts on future directions are provided. [ABSTRACT FROM AUTHOR]

This paper studies the evolution of individual earnings inequality and dynamics in Canada from 1983 to 2016 using tax files and administrative records. Linking individual tax filers to their employers (and rich administrative records on firms) beginning in 2001, it also documents the relationship between the earnings dynamics of workers and the size and growth of their employers. It highlights three main patterns over this period: First, with a few exceptions (sharp increase in top 1% and declining gender gap), Canada has experienced relatively modest changes in overall earnings inequality, volatility, and mobility between 1983 and 2016. Second, earnings inequality and the distribution of earnings growth vary substantially over the business cycle. Third, the earnings dynamics of individuals are strongly related to the size and employment growth of their employers. [ABSTRACT FROM AUTHOR]

This paper discusses the content of the cadre file of Henri H. Stahl preserved in the Archives of the University of Bucharest’s Rectorate. In the form in which it has been preserved after 1989, the personnel file of H.H. Stahl seems, from several points of view, atypical. If we compare it with the cadre files of the 1950s, it surprises by the apparent “goodwill” of the communist cadres towards H.H. Stahl. This ideological solicitude is manifested in the interpretation given to main cultural and political events in H.H. Stahl’s life. In other circumstances such political past could be labeled as unusable in a communist context. Equally curious and noteworthy is the issue of the ethnic origin attributed (and not necessarily real or assumed by the one described in the file), more precisely the issue of Stahl’s nationality ( Jewish) which was recorded in the file. Analyzing Stahl cadre file we can wonder if the integrity of this dossier has not been compromised by removing, extracting or modifying documents by the personel staff services or by someone else. [ABSTRACT FROM AUTHOR]

In August 1666, a year after first arriving in New Jersey, Governor Philip Carteret sent Surveyor General Robert Vauquellin to London to seek guidance and secure assistance from Sir George Carteret and Lord John Berkeley, Proprietors of New Jersey. In the letter he wrote with his provincial secretary, James Bollen, to accompany Vauquellin on his voyage, Governor Carteret described for the proprietors the daunting financial, administrative, and security challenges confronting the new colony. Transcribed here from the draft now in the Stevens Family Papers at the New Jersey Historical Society, the letter makes clear how tenuous Carteret's position was as he worked to establish his authority as Governor, not least due to conflicts with New York. The letter's survival, likely due to efforts by attorneys James Alexander and David Ogden in the 1740s to locate records to support their filings on behalf of the East Jersey Proprietors, illustrates how eighteenth-century legal battles over quitrents and land titles helped to identify and preserve foundational documents that continue to inform the study of early New Jersey. [ABSTRACT FROM AUTHOR]