1,664 research outputs found
Chemically enhanced primary treatment of wastewater in Honduran Imhoff tanks
No full textThesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2008.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Includes bibliographical references (leaves 61-63).Imhoff tanks represent approximately 40% of the wastewater treatment infrastructure in Honduras. This thesis evaluates the usage of solid aluminum sulfate as a means to achieving national effluent regulations in Imhoff tanks in the municipality of Las Vegas, Santa Barbara. The report contains a brief background on both Imhoff tanks and chemically enhanced primary treatment and a discussion of the governing technical considerations. The residents of Las Vegas produce a very high amount of relatively dilute domestic wastewater (approximately 1,000 liters/person/day). Bench scale testing and pilot testing during January 2008 in the Las Vegas Imhoff tanks found that a dosage of approximately 150 mg/l alum (17% Al2O3) was necessary to treat Las Vegas? domestic wastewater. However, solution preparation and chemical injection were found to be difficult to achieve under current conditions and the cost of alum in this quantity is prohibitively expensive. The final recommendations to the municipality of Las Vegas include encouragement to conserve water and a comprehensive plan to better maintain the Imhoff tanks in order to achieve higher levels of treatment. This thesis also documents the author's efforts to ascertain the status of Imhoff tanks in the rest of Honduras in terms of their size, design, and maintenance. During January 2008 three other Imhoff tanks in the department of Santa Barbara and one in the department of La Paz were visited and all were found to be in varied states of disrepair. However, several hold the potential to be rehabilitated after the removal of sludge.by Anne M. Mikelonis.M.Eng
On the impossibility of inferring cohort fertility measures from period fertility measures
No full textA particularly important struggle faced by demographic analysts is, how to arrive at statements about family formation processes from a cohort perspective from data that are essentially collected on an annual basis. The present paper is concerned with this struggle, mostly restricted to the case of fertility. The central question investigated here is: given observed period data, what can we conclude about the completed family size of real women? I review several existing methods to infer cohort fertility from period fertility measures. The conclusion is that, for each method, its justifiability can be verified only empirically: by looking at cohort fertility directly. To illustrate how this can be done, the paper analyses fertility data from a cohort perspective for two countries, Italy and the Netherlands.cohort fertility, demographic transition, fertility, Italy, Netherlands, period adjustment, tempo and quantum, total fertility rate
Standardisierung in der Medizin: Qualitätssicherung oder Rationierung?
No full textDietrich F, Imhoff M, Kliemt H, eds. Standardisierung in der Medizin: Qualitätssicherung oder Rationierung?. Stuttgart, New York: Schattauer; 2004
Morion guineensis Imhoff 1843
No full textMorion guineensis Imhoff, 1843 Distribution in Angola (Provinces): 1) Cunene; 2) Luanda, Bié. Material examined. Barra do Cuanza (09° 18´55.42´´ S, 13° 09´58.57´´ E, 11 m alt., 107) (LUANDA), 28. IV.2014, 1 ♀, LT, A. Serrano & R. Capela leg., ASC; Satchijamba-Somakwanza (13° 44´46.50´´ S, 17° 11´2.26´´ E, 1611 m alt., 283) (BIÉ), 2. XI.2014, 1 ♀, LT, A. Serrano & R. Capela leg., ASC. Remarks. A species widespread throughout almost all Africa south of Sahara, including S. Tomé Island (e.g. Straneo 1959, Ferreira 1965, Serrano 1995). Adults were collected by light trapping within a riparian forest (Barra do Cuanza) and an open secondary forest (Satchijamba-Somakwanza). In the later locality the adults were collected together with ant nest beetles [Paussus (Shuckardipaussus) vanrooni Wasmann, 1922, Paussus (Katapaussus) chappuisi Reichensperger, 1938] (see Serrano 2015a). It is a new record for the Luanda and Bié Provinces.Published as part of Serrano, Artur R. M., Capela, Rúben A. & Santos, Carmen Van-Dúnem Neto, 2017, Biodiversity and notes on carabid beetles from Angola with description of new taxa (Coleoptera: Carabidae), pp. 201-256 in Zootaxa 4353 (2) on page 208, DOI: 10.11646/zootaxa.4353.2.1, http://zenodo.org/record/106512
Microallocation of medical resources: economics and ethics
No full textDietrich F, Kliemt H, Imhoff M, eds. Microallocation of medical resources: economics and ethics. Homo oeconomicus , 19.2002,1. München: Accedo-Verl.-Gesellschaft; 2002
Mikroallokation medizinischer Ressourcen: medizinische, medizinethische und gesundheitsökonomische Aspekte der Knappheit medizinischer Ressourcen
No full textDietrich F, Imhoff M, Kliemt H, eds. Mikroallokation medizinischer Ressourcen: medizinische, medizinethische und gesundheitsökonomische Aspekte der Knappheit medizinischer Ressourcen. Stuttgart, New York: Schattauer; 2003
Konkurrenz der Leitlinien?: eine Chance für die Patientenautonomie?
No full textDietrich F. Konkurrenz der Leitlinien?: eine Chance für die Patientenautonomie? In: Dietrich F, Imhoff M, Kliemt H, eds. Standardisierung in der Medizin: Qualitätssicherung oder Rationierung?. Stuttgart: Schattauer; 2004: 17-24
Wider einen strikten Egalitarismus in der Gesundheitsversorgung: ethischer Kommentar zu Valerie Day
No full textDietrich F. Wider einen strikten Egalitarismus in der Gesundheitsversorgung: ethischer Kommentar zu Valerie Day. In: Dietrich F, Imhoff M, Kliemt H, eds. Mikroallokation medizinischer Ressourcen: medizinische, medizinethische und gesundheitsökonomische Aspekte der Knappheit medizinischer Ressourcen. Stuttgart: Schattauer; 2003: 111-114
Against Schematic Egalitarianism: Ethical Comment on Valerie Day
No full textDietrich F. Against Schematic Egalitarianism: Ethical Comment on Valerie Day. In: Dietrich F, Imhoff M, Kliemt H, eds. Microallocation of medical resources: economics and ethics. Homo oeconomicus ; 19,1. München: Accedo-Verl.-Gesellschaft; 2002: 115-117
Andrena humilis IMHOFF 1832
No full textAndrena humilis IMHOFF, 1832, Gewöhnliche Dörnchensandbiene N a c h w e i s e: 19. Bez., Michaelerwald, ohne nähere Angaben, 15. V.2009, 1♀, lcEO, det. F. Gusenleitner; 16. Bez., Wilhelminenberg, F &B-M06, 21.IV.2002, 1♁, ldcHZ; 23. Bez., Gütenbachtal, Eichwiese, N 48°08,9′, E 16°13,9′, 390 m SH, F&B-U03, 30. V.2004, 2♁♁, ldcHZ; 23. Bez., Mauer, Himmelwiese und Umgebung, 12. VI.2010, 2♀♀, ldcHZ.Published as part of Zettel, Herbert, Ockermüller, Esther, Schoder, Sabine & Seyfert, Franz, 2022, Zur Verbreitung der Wildbien en (Hymenoptera, Apidae) in Wien, Österreich, pp. 351-396 in Linzer biologische Beiträge 54 (1) on page 356, DOI: 10.5281/zenodo.750760
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