Tools for water quality monitoring and mapping using paper-based sensors and cell phones

Sicard, Clémence; Glen, Chad; Aubie, Brandon; Wallace, Dan; Jahanshahi‐Anbuhi, Sana; Pennings, Kevin; Daigger, Glen T.; Pelton, Robert; Brennan, John D.; Filipe, Carlos D. M.

doi:10.1016/j.watres.2014.12.005

Cited by 193 publications

(119 citation statements)

References 29 publications

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“…Besides this, the access to affordable digital cameras is no longer a problem in almost any country. All modern cell phones have high quality cameras allowing accurate photographs and high quality research at low cost in many fields (Krishna et al, 2009;Calabrese et al, 2011;Guerrero et al, 2012;Sicard et al, 2015). As this method needs less time in the field, it is also safer for the researchers considering that some urban parks are potentially insecure (Glaser, 1994;Carrión et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

An improved method to estimate pigeon populations in urban areas

Barrientos

Seas

2018

URJ

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ABSTRACT:The Rock Pigeon, Columba livia, is rare in natural environments but extremely successful in urban areas all over the world. Management programs are important because it is considered a pest in many cities. Nevertheless, no appropriate evaluation of methods to estimate urban pigeon populations is available in the literature. We compared three methods: a) the frequently used Stratified grids; b) Point counts, i.e. total pigeon counts with a mechanic counter in sampling points with a 50m radius; and c) Panoramas, 360 o panoramic photographs. In nine urban parks in central Costa Rica, we made 1350 counts in total and compared: coefficient of variation (to assess precision); accuracy; time counting or taking photographs in situ; time merging photographs, counting pigeons in photographs, or typing data; and advantages or disadvantages. The Panorama Method is cheap, precise, accurate, secure, fast and easy. It can be used as an indicator or to estimate the actual population.Key words: Rock pigeon; urban parks; correction factor; population density; panoramic photograph. RESUMEN: Comparación de tres métodos de estimación de poblaciones de palomas en áreas urbanas, y sus implicaciones en el manejo de plagas. La paloma de castilla, Columba livia, es poco común en ambientes naturales, pero tiene mucho éxito en áreas urbanas de todo el mundo. Se considera una plaga en muchas ciudades y, por lo tanto, los programas de gestión son importantes. Sin embargo, no se cuenta con una buena evaluación de los métodos para estimar las poblaciones de palomas urbanas en la literatura. Comparamos tres métodos: a) Cuadrículas estratificadas; b) Puntos de conteo, conteo total de palomas con un contador mecánico en puntos de muestreo con un radio de 50 m; y c) Panoramas, fotografías panorámicas de 360º. Hicimos 1 350 conteos en nueve parques urbanos en el centro de Costa Rica, y comparamos: coeficiente de variación (para evaluar precisión); exactitud; tiempo al contar o tomar fotografías in situ; tiempo combinando fotografías, contando palomas en fotografías o escribiendo datos; y ventajas o desventajas. El método panorámico es económico, preciso, exacto, seguro, rápido y fácil. Se puede usar como un indicador o para estimar la población real.Palabras clave: paloma de castilla; parques urbanos; factor de corrección; densidad poblacional; fotografías panorámicas.

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Section: Discussionmentioning

confidence: 99%

An improved method to estimate pigeon populations in urban areas

Barrientos

Seas

2018

URJ

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“…Many groups propose a cell phone application 8,10,63,103 for simple sensor calibration as well as reporting concentrations of harmful analytes. 9 Chen et al introduced a new method of capture and detection for Hg 2+ ions using AuNPs modified filter paper (Fig. 10).…”

Section: ·2 Environmental Detectionmentioning

confidence: 99%

“…7 Nanostructures can be diverse in elemental composition, size, morphology, oxidation state or shape which allow them to be tuned in order to maximize reduction/oxidation, 8 optical 9 or catalytic 10 properties. A variety of nanomaterials can be used, with the most prevalent being: i) metals such as silver (Ag), platinum (Pt), gold (Au) and palladium (Pd), ii) metal-oxides like silica (SiO2), titania (TiO2), ceria (CeO2) and iron oxides (Fe2O3) as well as iii) carbon, semiconducing and polymer-based materials and composites such as carbon nanotubes, graphene and quantum dots.…”

mentioning

confidence: 99%

Nanomaterial-functionalized Cellulose: Design, Characterization and Analytical Applications

2018

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“…using paper based sensors and cell phone [5]. This system was a combination of paper-based sensors and a novel smart-phone application for on-site quantification of colorimetric readouts as an ultralow cost solution to monitoring water quality.…”

Section: Related Workmentioning

confidence: 99%

System Engineering for Online Monitoring and Early Warning of Water Environment

Setiawan

Sudriani

2016

INKOM

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AbstrakAktivitas pengukuran biasanya dilakukan pada satu waktu atau di waktu-waktu tertentu. Dalam kasus ketika pengukuran hanya dilakukan pada satu waktu, pengukuran yang dilakukan secara manual dengan mengunjungi lokasi, melakukan pengukuran, mencatatnya, dan kemudian meninggalkan lokasi tidaklah menjadi masalah. Akan tetapi, ketika beberapa atau banyak pengukuran harus dilakukan pada rentang waktu tertentu atau tahunan, pengukuran yang dilakukan secara manual akan melelahkan, memakan banyak biaya dan waktu. Desain dan implementasi sistem embedded untuk pemantauan dan peringatan dini bencana lingkungan perairan kemudian diusulkan. Sistem ini terdiri dari dua bagian: stasiun pemantau dan pusat pemantauan. Stasiun pemantau merupakan sebuah sistem embedded yang memiliki antarmuka dengan alat pengukur (logger). Pusat pemantauan adalah sebuah komputer yang menjalankan layanan pengambilan data yang dikirim oleh stasiun pemantau, memprosesnya, dan memasukkannya kedalam database. Pusat pemantauan juga menjalankan layanan http agar data dari stasiun pemantau dapat ditampilkan kepada pengguna baik dalam bentuk tabular ataupun grafik melalui website.Implementasi sistem ini dapat melakukan pengukuran secara kontinyu dan online serta hasil pengukuran tersebut dapat dipantau dari jarak jauh.Kata kunci: pengawasan online, sistem peringatan dini, lingkungan perairan ______________________________________________________________________________________

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Tools for water quality monitoring and mapping using paper-based sensors and cell phones

Cited by 193 publications

References 29 publications

An improved method to estimate pigeon populations in urban areas

An improved method to estimate pigeon populations in urban areas

Nanomaterial-functionalized Cellulose: Design, Characterization and Analytical Applications

System Engineering for Online Monitoring and Early Warning of Water Environment

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