112,064 research outputs found
An IoT System for the Measurement and the Interpretation of the Photosynthesis-Related CO2 Fluxes
No full textThe estimation of the CO2 concentration variations due to plants photosynthesis has become a topic of outstanding interest in view of evaluating the carbon footprint of greenhouses and farms. In this framework, distributed sensing solutions can be an alternative to expensive and power-consuming gas analyzers. In this paper, a low-cost sensor node thought for the accurate monitoring of photosynthesis-related quantities (i.e., temperature, pressure, water vapor concentration and CO2 concentration) is presented. The system is validated through measurement campaigns involving plants enclosed in an accumulation chamber in the presence of artificial light with controlled intensity, photoperiod and spectral composition. A simplified preliminary model is also proposed to interpret the obtained results from the point of view of the kinetics of the gas exchanges, achieving the estimation of the CO2 uptake and release rates ascribable to the plants activit
author-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
Management of large prostatic abscess associated with urethral stenosis and penile cancer recurrence.
No full textINTRODUCTION: The purpose of this report was to analyze the management of a large prostatic abscess in a patient with urethral stenosis and recurrence of penile cancer, who had presented with acute urinary retention.
METHODS: The clinical diagnosis was based on the end-fire transrectal ultrasound (TRUS) findings and later confirmed by CT. The patient had several surgical scars and radiation-induced effects in the lower abdomen, therefore the placement of a percutaneous sovrapubic catheter was considered hazardous. The placement of a transurethral catheter was impossible because of firm meatal stenosis due to previous penile partial amputation and growing tissue that suggested local recurrence of penile cancer.
RESULTS: Transurethral placement of a 8 Fr catheter was possible under radiologic/ultrasound control using a hydrophilic glidewire. The definitive treatment also included percutaneous transperineal drainage and placement of a 8 Fr pig-tail drain under TRUS. Subsequent surgical treatment of the penis showed low grade superficial squamous cell carcinoma. Management and follow-up of prostatic abscess is based on TRUS imaging. After 4 years of follow-up, abscess recurrence was observed and treated with a urethral catheter and antibiotics.
CONCLUSION: Urethral stenosis due to penile cancer is a predisposing factor in the development of prostatic abscesses. Placement of a bladder catheter and percutaneous drainage of the abscess are the mainstays of treatment. In malignant urethral stenosis, the conservative management of a prostatic abscess is safe and efficacious in a long-term follow-up. Transrectal US is a key instrument to guide intervention and to check results
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Ion current sensor for gas turbine condition dynamical monitoring: Modeling and characterization
No full textThis paper aims to thoroughly investigate the potential of ion current measurements in the context of combustion process monitoring in gas turbines. The study is targeted at characterizing the dynamic behavior of a typical ion-current measurement system based on a spark-plug. Starting from the preliminary study published in a previous work, the authors propose a refined model of the electrode (spark plug), based on the Langmuir probe theory, that incorporates the physical surface effects and proposes an optimized design of the conditioning electronics, which exploits a low frequency AC square wave biasing of the electrodes and allows for compensating some relevant parasitic effects. The authors present experimental results obtained in the laboratory, which allow for the evaluation of the validity of the model and the interpreting of the characteristics of the measurement signal. Finally, measurements carried out in the field on an industrial combustor are presented. The results confirm that the charged chemical species density sensed by the proposed measurement system and related to the mean value of the output signal is an indicator of the ‘average’ combustion process conditions in terms e.g., of air/fuel ratio, whereas the high frequency spectral component of the measured signal can give information related to the turbulent regime and to the presence of pressure pulsations. Results obtained with a prototype system demonstrated an achievable resolution of about 5 Pa on the estimated amplitude, even under small biasing voltage (22.5 V) and an estimated bandwidth of 10 kHz
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Hermetism from Late Antiquity to Humanism. La tradizione ermetica dal mondo tardo-antico all'Umanesimo, Atti del Convegno internazionale di studi, Napoli, 20-24 novembre 2001
No full textKali parri Johnson and Cohen 1974
No full text<i>Kali parri</i> Johnson and Cohen 1974 <p>(Figs. 1 E, 6, and 8; Tables 1, 7, and 8)</p> <p> <i>Kali parri</i> Johnson and Cohen 1974: 37 –39, figure 13 [original description; type locality South Atlantic, 5°30'S, 16°28'W, 0–1900 m, 9–III–1971, R/V <i>Walther Herwig</i>; holotype ISH 2123a–1971]; Johnson and Keene 1986: 734, figure 228.9 [key to the species]; Smith (in press) [key to species]; Johnson and Keene 1990: 902 [record of eastern tropical Atlantic species].</p> <p> <b>Examined material.</b> 11 specimens, including several paratypes. <b>Atlantic, Slope Water:</b> MCZ 162234, 1, 91.9 mm, 39°52’ N, 67°21’ W, 0–1400 m, 26–VII–2002, R/V <i>Delaware</i>; MCZ 164284, 1, 56.9 mm, 39°57’ N, 67°30’ W, 0–1428 m, 5–VI–2004, R/V <i>Delaware</i>. <b>North Sargasso Sea:</b> MCZ 101643, 1, 55.0 mm, 31°43’ N, 64°10’ W, 1000–1269 m, 13–VI–1992, R/V <i>Endeavor</i>. <b>Straits of Florida:</b> UF 131503, 1, 235.5 mm, 23°56’ N, 75°26’ W, 71–2162 m, 5–IX–1975, Staiger <i>et al.</i> col. <b>Amazonian Province:</b> ISH 919–1968, 1 (paratype), 109.4 mm, 3°00’ S, 26°16’ W, 0–2000, R/V <i>Walther Herwig</i>. <b>South Atlantic Subtropical:</b> USMN 207611, 1 (paratype), 192.0 mm, collected 27°14’ S, 2°56’ E, 0–2000 m, 1–IV–1971, R/V <i>Walther Herwig</i>. <b>Guinean Province:</b> ISH 2123b–1971, 1 (paratype), 142.5 mm, 27°14’ S, 2°56’ E, 0–2000 m, 1–IV– 1971, R/V <i>Walther Herwig</i>; USNM 207604, 1 (paratype, collected with holotype), 18.86 mm, 5°30'S, 16°28'W, 0–1900 m, 9–III–1971, R/V <i>Walther Herwig</i>. <b>Indian.</b> AMS 31143012, 1, 90.1 mm, 20°55’ S, 112°51’ E, 1128–1139 m, 23–I–1991, J. Paxton col. <b>Pacific Plate:</b> SIO 56–127–60, 1, 58.8 mm, 13°03’ N, 166°14’ E, 730 m, 23/ 24–VI–1956, R/V <i>Horizon</i>; SIO 72–307–60, 1, 62.7 mm, 25°06’ S, 154°53’ W, 29– VII–1972, R/V <i>Melville</i>.</p> <p> <b>Diagnosis.</b> <i>Kali parri</i> is diagnosed from its congeners by four unique characteristics: the orobranchial chamber and gill arches black, intensively pigmented (<i>vs.</i> orobranchial chamber and gill arches pale, melanophores widely spaced or absent); teeth in lateral series of premaxilla and dentary with ventral attachment, recurved, extending along the entire dentigerous area, teeth type 4 completely absent (<i>vs.</i> teeth type 4 in lateral series of premaxilla and dentary always present, needle-like, caniniform or recurved; recurved teeth with ventral attachment in lateral series absent in <i>K. colubrina</i>, <i>K. falx</i>, <i>K. indica</i>, <i>K. kerberti</i>, <i>K. macrodon</i>, and restricted to posterior part of dentigerous area of premaxilla and dentary in <i>K. macrura</i>); tooth crown not distinguishable (<i>vs.</i> tooth crown clearly distinguishable in teeth in mesial series, 10.0–45% in tooth length). <i>Kali parri</i> can be further distinguished from all species of <i>Kali</i>, except <i>K. macrura</i> by smaller number of second dorsal-fin rays, 20–23, modally 21 (<i>vs.</i> second dorsal-fin rays usually 22 or more); anal-fin rays 20–23, modally 22 (<i>vs.</i> anal-fin rays usually more than 22).</p> <p> <b>Description.</b> Moderate-sized species of <i>Kali</i>, largest specimen examined 235.5 mm SL. Meristic data summarized in table 3, and morphometric in table 5. General body pattern as described for genus.</p> <p> <b>Dentition.</b> Teeth present on premaxilla, dentary, palatine, upper and lower pharyngobranchials; premaxilla and dentary as illustrated in figure 1 E. Tooth crown not distinguishable. Premaxilla elongate, slightly arched in lateral view, with teeth arranged in two series: lateral and mesial. Lateral series in single row, teeth with ventral attachment, recurved, with flange; teeth at anterior edge of premaxilla flared outwards. Mesial series in single row; teeth with ventral attachment, with flange, all except third, recurved; third tooth elongated slightly curved, largest, 10.4–12.1% in premaxillary length; none enlarged as fang. Teeth equally and closed spaced, decreasing in size from anterior to posterior.</p> <p>Dentary elongate, slightly arched in lateral view; teeth arranged in two series of single row each: lateral and mesial. Lateral series in single row, teeth with ventral attachment, recurved, with flange; teeth at anterior curvature of dentary flared outwards. Mesial series in single row; teeth with ventral attachment, with flange, all except second recurved; second tooth elongated slightly curved, largest, 6.7–8.4% in dentary length; none developed as fang. Teeth equally and closely spaced, decreasing in size from anterior to posterior.</p> <p>Palatine teeth type 4, conical, slender, with flange, in single row. Lower pharyngeal teeth type 4, conical, slender, without flange, in single row; upper pharyngeal teeth type 4, conical, slender, without flange, in patches. Gill rakers tooth-like, type 1, conical, slender, without flange; present on first, second, third and fourth arches; absent in basihyal and basibranchials.</p> <p> <b>Distribution.</b> In equatorial to temperate regions; in the Atlantic from 40° N to 30° S, western Indian off Australia and in the Pacific Plate from 13° N to 25° S (Fig. 9).</p> <p> <b>Bathymetric distribution.</b> Bathypelagic zone; more frequently recorded at depths around 2000 m (mean 1649 m). A single record from above 1000 m (730 m); deepest record at 2162 m.</p> <p> <b>Color.</b> Skin covering preserved in most specimens examined, description based on ISH 2123b/1971. Epidermis black; dermis thin, dusky, melanophores not distinguishable. Peritoneum black. Orobranchial chamber, gill arches and membranes between branchiostegal rays black; gill filaments pale.</p>Published as part of <i>Melo, Marcelo R. S., 2008, The genus Kali Lloyd (Chiasmodontidae: Teleostei) with description of new two species, and the revalidation of K. kerberti Weber, pp. 1-33 in Zootaxa 1747</i> on pages 22-24, DOI: <a href="http://zenodo.org/record/181658">10.5281/zenodo.181658</a>
Pervasive IoT Monitoring of CO2 for Smart Agriculture
No full textThis study presents a flexible loT monitoring system suitable for gas sensing, applicable to the pervasive experimental assessments of C02 concentrations, particularly in relation to plant respiration and chlorophyll photosynthesis. Beyond C02 measurement, the system incorporates the monitoring of other parameters, among which those meaningful for chlorophyll photosynthesis, including light intensity and water vapor concentration. The system architecture, composed of flexible sensing nodes, builds upon a pre-existing model, enhancing its functionalities. Each sensor node integrates an MCU and hosts front-end electronics for six analog gas sensors utilizing various technologies. Preliminary tests embedded an electrochemical N02 sensor, an NDIR C02 sensor, and a BME280 sensor for measuring temperature, humidity, and pressure. To ensure accuracy, individual sensor calibration and a temperature-compensation procedure are applied on the edge. This monitoring system establishes a solid foundation for versatile applications, providing a valuable tool for research in the 'smart' agriculture field
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