Aql X-1 in Outburst and Quiescence

We present photometry and spectroscopy of the soft x-ray transient Aql X-1. Optical photometry during an active state shows a strong (0.6 mag peak-to-peak) modulation at a period of 19 hours. Infrared (K'-band) photometry during a quiescent state limits any ellipsoidal variations to <0.07 mag (peak-to-peak), which implies an inclination i<31 (90% limit). Spectroscopy in a quiescent state shows at most very small radial velocity variations, which implies a very low inclination of i<12 (90% limit). The low inclination is rather unexpected given the large photometric modulation seen in the active state. The upper limit to the equivalent width of the anomalous Li 6707A line is <0.3A, which is similar to the measured strength of this line in several other x-ray transients.Comment: Accepted for publication in ApJ, 12 pages, 5 figure

Disk Detective: Discovery of New Circumstellar Disk Candidates through Citizen Science

The Disk Detective citizen science project aims to find new stars with 22 micron excess emission from circumstellar dust using data from NASA's WISE mission. Initial cuts on the AllWISE catalog provide an input catalog of 277,686 sources. Volunteers then view images of each source online in 10 different bands to identify false-positives (galaxies, background stars, interstellar matter, image artifacts, etc.). Sources that survive this online vetting are followed up with spectroscopy on the FLWO Tillinghast telescope. This approach should allow us to unleash the full potential of WISE for finding new debris disks and protoplanetary disks. We announce a first list of 37 new disk candidates discovered by the project, and we describe our vetting and follow-up process. One of these systems appears to contain the first debris disk discovered around a star with a white dwarf companion: HD 74389. We also report four newly discovered classical Be stars (HD 6612, HD 7406, HD 164137, and HD 218546) and a new detection of 22 micron excess around a previously known debris disk host star, HD 22128.Comment: 50 pages, accepted for publication in the Astrophysical Journa

Concert recording 2022-04-06

[Track 1]. Three pieces / Igor Stravinsky -- [Track 2]. Sonata for clarinet and piano. II. Lebhaft / Paul Hindemith -- [Track 3]. Fantasiestücke, op. 73. I. Zart und mit Ausdruck ; II. Lebhaft, leicht / Robert Schumann -- [Track 4]. Duo for clarinet and piano. I. Allegro / Norbert Burgmüller -- [Track 5]. Sonata for clarinet and piano. II. Allegro animato / Camille Saint-Saëns -- [Track 6.] Set for clarinet. III. Vite / Katherine Hoover -- [Track 7]. Ballade, bass clarinet & piano / Eugène Bozza -- [Track 8]. Introduction, theme and variations / Carl Maria von Weber -- [Track 9]. Five Bagatelles. IV. Forlana / Gerald Finzi -- [Track 10]. Six studies in English folksongs. V. Andante tranquillo ; VI. Allegro vivace -- [Track 11]. Grand duo concertant. I. Allegro con fuoco / Carl Maria von Weber

Concert recording 2022-04-06

[Track 1]. Three pieces / Igor Stravinsky -- [Track 2]. Sonata for clarinet and piano. II. Lebhaft / Paul Hindemith -- [Track 3]. Fantasiestücke, op. 73. I. Zart und mit Ausdruck ; II. Lebhaft, leicht / Robert Schumann -- [Track 4]. Duo for clarinet and piano. I. Allegro / Norbert Burgmüller -- [Track 5]. Sonata for clarinet and piano. II. Allegro animato / Camille Saint-Saëns -- [Track 6.] Set for clarinet. III. Vite / Katherine Hoover -- [Track 7]. Ballade, bass clarinet & piano / Eugène Bozza -- [Track 8]. Introduction, theme and variations / Carl Maria von Weber -- [Track 9]. Five Bagatelles. IV. Forlana / Gerald Finzi -- [Track 10]. Six studies in English folksongs. V. Andante tranquillo ; VI. Allegro vivace -- [Track 11]. Grand duo concertant. I. Allegro con fuoco / Carl Maria von Weber

Concert recording 2022-11-14

[Track 1]. Solo de concours / André Messager -- [Track 2]. Concertino for clarinet and piano / Carl Maria von Weber -- [Track 3]. Concerto No. 2 in E-flat Major. III. Alla polacca / Carl Maria von Weber -- [Track 4]. Sonatina for clarinet and piano. III. Furioso / Malcolm Arnold -- [Track 5]. Promenade (Walking the dog) for clarinet & piano / George Gershwin / arr. Shieley Denwood -- [Track 6]. Fantasistykke for clarinet and piano / Carl Nielsen -- [Track 7]. Sonata for clarinet and piano. I. Mässig bewegt / Paul Hindemith -- [Track 8]. Premiere Rhapsody for clarinet and piano / Claude Debussy -- [Track 9]. Impromptu: Duo for Clarinet and Marimba / William A.R. May -- [Track 10]. Irish suite / arr. Elliot A. Del Borgo -- [Track 11]. Danse Macabre / Camille Saint-Saëns ; arr. Melanie Thorne -- [Track 12]. “Nimrod” from Enigma variations / Edward Elgar ; arr. Jeanie Murrow -- [Track 13]. Claribel / Roland Cardon

Concert recording 2022-11-14

[Track 1]. Solo de concours / André Messager -- [Track 2]. Concertino for clarinet and piano / Carl Maria von Weber -- [Track 3]. Concerto No. 2 in E-flat Major. III. Alla polacca / Carl Maria von Weber -- [Track 4]. Sonatina for clarinet and piano. III. Furioso / Malcolm Arnold -- [Track 5]. Promenade (Walking the dog) for clarinet & piano / George Gershwin / arr. Shieley Denwood -- [Track 6]. Fantasistykke for clarinet and piano / Carl Nielsen -- [Track 7]. Sonata for clarinet and piano. I. Mässig bewegt / Paul Hindemith -- [Track 8]. Premiere Rhapsody for clarinet and piano / Claude Debussy -- [Track 9]. Impromptu: Duo for Clarinet and Marimba / William A.R. May -- [Track 10]. Irish suite / arr. Elliot A. Del Borgo -- [Track 11]. Danse Macabre / Camille Saint-Saëns ; arr. Melanie Thorne -- [Track 12]. “Nimrod” from Enigma variations / Edward Elgar ; arr. Jeanie Murrow -- [Track 13]. Claribel / Roland Cardon

Effects of nonantibiotic feed additives on performance, nutrient retention, gut pH, and intestinal morphology of broilers fed different levels of energy.

An experiment was conducted to determine the effects of different feed additives on performance, nutrient retention, gut pH, and intestinal morphology of broilers fed different levels of energy. This study was a 4 × 2 factorial arrangement of 4 feed additive programs (a basal diet without any feed additive as the control, the basal diet with added organic acid, the basal diet with added prebiotic, and the basal diet with added probiotic) with recommended levels (3,150 and 3,200 kcal of ME/kg of diet for the starter and finisher diets, respectively) or low levels (90% of recommended) of energy. A total of 640 one-day-old male and female broiler chicks were randomly assigned to 8 treatments. Each treatment consisted of 4 replicate floor pens of 20 birds each. Starter and finisher diets were fed from 1 to 21 d and 21 to 42 d of age, respectively. Dietary levels of other nutrients, housing, and general management practices were similar for all treatments. Dietary inclusion of additives had no significant effects on broiler performance, intestinal villus height, crypt depth, gut pH, and dietary AME. Birds fed the low-energy diets were heavier but had inferior FCR compared with those fed the recommended-energy diets. Prebiotic and organic acid significantly (P < 0.05) improved protein digestibility. The recommended-energy diets significantly (P < 0.05) increased AME and protein digestibility. No interactions were observed for the measured parameters

Stakeholder engagement to evaluate tourist development plans with a sustainable approach

[EN] This study provides an evaluation of tourist development plans in the city of Cartagena de Indias (Colombia). Different stakeholders are involved in the search for solutions to this problem. The proposal is based on a model that combines two techniques, namely the analytic network process (ANP) and social network analysis (SNA). SNA is used to assess the relationships among stakeholders by identifying those who are most relevant and ANP is used to aggregate their opinions and evaluate tourist development plans of Cartagena to improve tourist experiences in a participatory way. The results suggest that the combination of SNA and ANP is a novel and suitable tool for strategic planning of a city.Bolivar Gana con CienciaGonzalez-Urango, H.; García-Melón, M. (2018). Stakeholder engagement to evaluate tourist development plans with a sustainable approach. Sustainable Development. 26(6):800-811. https://doi.org/10.1002/sd.1849S80081126