FOR-TSM: desarrollo de una herramienta de pronósticos con modelos de series de tiempo

Uno de los temas más complejos y necesarios en los cursos de Administración de Operaciones, es el uso de los pronósticos con modelos de series de tiempo (TSM por sus siglas en inglés) -- Para facilitar el entendimiento y ayudar a los estudiantes a comprender fácilmente los pronósticos de demanda, este proyecto presenta FOR TSM, una herramienta desarrollada en MS Excel VBA® -- La herramienta fue diseñada con una Interfaz gráfica de Usuario (GUI por sus siglas en inglés) para explicar conceptos fundamentales como la selección de los parámetros, los valores de inicialización, cálculo y análisis de medidas de desempeño y finalmente la selección de modelos

Padrões de comunicação científica nas ciências sociais : a interdisciplinaridade entre economia, ciência política, sociologia e antropologia

Tese (doutorado)—Universidade de Brasília, Faculdade de Ciência da Informação, Programa de Pós-Graduação em Ciência da Informação, 2015.

Bioorthogonal Noncanonical Amino Acid Tagging for Selective Analysis of the Pseudomonas aeruginosa Proteome

In natural environments, bacterial physiology is frequently characterized by slow metabolic rates and complex cellular heterogeneities. The opportunistic pathogen Pseudomonas aeruginosa provides one such example; P. aeruginosa forms untreatable chronic biofilm infections of the cystic fibrosis lung, where oxygen limitation can lead to states of metabolic dormancy. To better understand the biology of these states, in vitro experiments must be adapted to better recapitulate natural settings. However, low rates of protein turnover and cellular or phenotypic complexity make these systems difficult to study using established methods. Here we adapt the bioorthogonal noncanonical amino acid tagging (BONCAT) method for time- and cell-selective proteomic analysis to the study of P. aeruginosa. Analysis of proteins synthesized in an anoxic dormancy state led to the discovery of a new type of transcriptional regulator which we designated SutA. We performed detailed analyses of SutA’s role in transcription under slow growth states and we elucidated the structural basis for its regulatory behavior. Additionally, we used cell-selective targeting of BONCAT labeling to measure the dynamic proteomic response of an antibiotic-tolerant biofilm subpopulation. Overall this work shows the utility of selective proteomics as applied to bacterial physiology and describes the broad biological insight obtained from that application.

Sensor psychrometric approaches to mitigating aflatoxins in maize dried on farms in Kenya

Kenia liegt in den Äquatorialtropen von Ostafrika und ist als ein weltweiter Hot-Spot für Aflatoxinbelastung insbesondere bei Mais bekannt. Diese toxischen und karzinogenen Verbindungen sind Stoffwechselprodukte von Pilzen und so insbesondere von der Wasseraktivität abhängig. Diese beeinflusst sowohl die Trocknung als auch die Lagerfähigkeit von Nahrungsmitteln und ist somit ein wichtiger Faktor bei der Entwicklung von energieeffizienten und qualitätsorientierten Verarbeitungsprozessen. Die vorliegende Arbeit hat sich zum Ziel gesetzt, die Veränderung der Wasseraktivität während der konvektiven Trocknung von Mais zu untersuchen. Mittels einer Optimierungssoftware (MS Excel Solver) wurde basierend auf sensorerfassten thermo-hygrometrischen Daten der gravimetrische Feuchteverlust von Maiskolben bei 37°C, 43°C und 53°C vorausberechnet. Dieser Bereich stellt den Übergang zwischen Niedrig- und Hochtemperaturtrocknung dar. Die Ergebnisse zeigen deutliche Unterschiede im Verhalten der Körner und der Spindel. Die Trocknung im Bereich von 35°C bis 45°C kombiniert mit hohen Strömungsgeschwindigkeiten (> 1,5 m / s) begünstigte die Trocknung der Körner gegenüber der Spindel und kann daher für eine energieeffiziente Trocknung von Kolben mit hohem Anfangsfeuchtegehalt empfohlen werden. Weitere Untersuchungen wurden zum Verhalten unterschiedlicher Schüttungen bei der bei Mais üblichen Satztrocknung durchgeführt. Entlieschter und gedroschener Mais führte zu einem vergrößerten Luftwiderstand in der Schüttung und sowohl zu einem höheren Energiebedarf als auch zu ungleichmäßigerer Trocknung, was nur durch einen erhöhten technischen Aufwand etwa durch Mischeinrichtungen oder Luftumkehr behoben werden könnte. Aufgrund des geringeren Aufwandes für die Belüftung und die Kontrolle kann für kleine landwirtschaftliche Praxisbetriebe in Kenia daher insbesondere die Trocknung ganzer Kolben in ungestörten Schüttungen empfohlen werden. Weiterhin wurde in der Arbeit die Entfeuchtung mittels eines Trockenmittels (Silikagel) kombiniert mit einer Heizquelle und abgegrenztem Luftvolumen untersucht und der konventionellen Trocknung gegenüber gestellt. Die Ergebnisse zeigten vergleichbare Entfeuchtungsraten während der ersten 5 Stunden der Trocknung. Der jeweilige Luftzustand bei Verwendung von Silikagel wurde insbesondere durch das eingeschlossene Luftvolumen und die Temperatur beeinflusst. Granulierte Trockenmittel sind bei der Maistrocknung unter hygienischen Gesichtspunkten vorteilhaft und können beispielsweise mit einfachen Öfen regeneriert werden, so dass Qualitätsbeeinträchtigungen wie bei Hochtemperatur- oder auch Freilufttrocknung vermieden werden können. Eine hochwertige Maistrocknungstechnik ist sehr kapitalintensiv. Aus der vorliegenden Arbeit kann aber abgeleitet werden, dass einfache Verbesserungen wie eine sensorgestützte Belüftung von Satztrocknern, der Einsatz von Trockenmitteln und eine angepasste Schüttungshöhe praktikable Lösungen für Kleinbauern in Kenia sein können. Hierzu besteht, ggf. auch zum Aspekt der Verwendung regenerativer Energien, weiterer Forschungsbedarf.

Avaliação socioambiental da diversificação produtiva e adoção de boas práticas de produção leiteira em pequena propriedade familiar em Piracanjuba (GO).

O presente trabalho refere-se a uma Avaliação Socioambiental realizada pela Embrapa Meio Ambiente em parceria com a Cooperativa Agropecuária Mista de Piracanjuba (COAPIL),como parte de um projeto de Gestão Ambiental da Produção Leiteira na Região Centro-Sul desenvolvido pela Universidade Católica de Goiás (UCG). Esta avaliação resultou da aplicação do Sistema Base de Avaliação e Eco-Certificação de Atividades Rurais (Eco-cert.Rural) na diversificação produtiva e na adoção de boas práticas de produção em uma pequena propriedade familiar no município de Piracanjuba/GO. Para tanto, foi realizada no dia 21 de Fevereiro de 2008, uma entrevista/vistoria com o acompanhamento do proprietário para a avaliação dos indicadores de desempenho socioambiental das atividades praticada na propriedade. O Sistema Eco-cert.Rural consiste de um conjunto de planilhas eletrônicas (plataforma MS-Excel) construídas para a avaliação do desempenho ecológico e socioambiental de uma dada atividade rural, considerando seus impactos ecológicos, econômicos e sociais. O sistema compõe-se de duas dimensões (Ecológica e Socioambiental)considerando sete aspectos essenciais de avaliação: i. Uso de Insumos e Recursos, ii. Qualidade Ambiental, iii. Respeito ao Consumidor, iv. Emprego, v. Renda, vi. Saúde e vii. Gestão e Administração, que são expressos por vinte e quatro indicadores e cento e vinte cinco componentes. O resultado final desta avaliação consiste no Índice de Desempenho da Atividade, que foi de 1,41 (de uma escala que varia de ?15 a +15) no estabelecimento estudado mostrando uma tendência positiva no manejo praticado no estabelecimento.

Association for Learning Technology Annual Survey 2016 Data and Report

This report presents findings from the third Association for Learning Technology (ALT) Annual Survey. As with previous years, the survey was advertised predominately to ALT Members but at the same time promoted publically, and responses were collected between December and January. In total 245 responses have been analysed, 88% (n. 216) of these being submitted by ALT Members. The ALT Annual Survey contains a common core of questions asked in all annual surveys. This year the survey was supplemented with additional questions specifically aimed at informing the new ALT Strategy 2017–2020.

Association for Learning Technology Annual Survey 2017 Data and Report

This is the fourth Association for Learning Technology (ALT) Annual Survey. As with previous years, the survey was advertised predominately to ALT Members but at the same time promoted publically, and responses were collected between December 2017 and January 2018. The ALT Annual Survey contains a common core of questions asked in all annual surveys. This year the survey was supplemented with additional questions specifically aimed at gaining feedback for Certified Member of ALT (CMALT) framework and to identify other priorities 2018.

Association for Learning Technology Annual Survey 2018 Data and Report

This is the fifth Association for Learning Technology (ALT) Annual Survey. As with previous years, the survey was advertised predominately to ALT Members but at the same time promoted publically. The ALT Annual Survey contains a common core of questions asked in all annual surveys.

#ThinkUHI #BalanceforBetter analysis of ALT Annual Survey responses based on gender

An analysis of ALT Annual Survey responses looking at gender differences.

Association for Learning Technology (ALT) Annual Survey 2019 Data and ALT Survey Report 2020

This is the sixth Association for Learning Technology (ALT) Annual Survey. As with previous years, the survey was advertised predominately to ALT Members but at the same time promoted publically. The ALT Annual Survey contains a common core of questions asked in all annual surveys.

Sealing practices in the Near East during the Late Bronze II period: administration and trade in the age of internationalism

This PhD research investigates sealing practices in the Near East during the Late Bronze II period (ca. 1375-1175 BCE). Sealings from archaeological contexts in the Southern Levant, North Syria, Upper and Lower Mesopotamia and South-Western Iran are taken under consideration and analyzed on multiple aspects at local, regional, and international levels. The contextual, functional, and iconographic analysis of these materials, in fact, allows to reconstruct the nature of the transactions and the agents involved in the sealing operations within local administrative systems, highlighting at the same time aspects of inter-regional interactions during the age of internationalism. Following a survey of the available evidence, a corpus consisting of 1845 records from 28 different sites across the ANE, has been filed using MS Access and MS Excel, including 740 unpublished sealing from Karkemish. Among this large evidence, the corpus of recently discovered sealings from Karkemish and the other scattered sealings from the North Syrian provinces, for instance, provide insights on the core-periphery relationships under the Hittite Empire; while the deposit from Building P at Tell Sheikh Hamad, that of the Middle Assyrian houses at Tell Fekheriye, and of the dunnu of Tell Sabi Abyad, significantly contributes to defining the administration of provinces within the Middle Assyrian state and the regional circulation of good. The less extensive evidence from South Mesopotamia under the Kassite rule and from Middle Elamite contexts in South-Western Iran somewhat contribute as well to the understanding of sealing practices in the LB II period. The South Levantine kingdoms, on the other hand, seems participates to the Egyptian regional network of exchanges and sealing practices.

Biomasa de las especies pelágicas más abundantes e importantes del mar peruano en el invierno 2001

La biomasa se determino por el método de estratificación, en áreas isoparalitorales de 10x30’. Se utilizaron los programas ECHOVIEW, MAPINFO Y EXCEL para el procesamiento de datos.

La representació del cos a la cort imaginada d'Alfons X El Savi : educació corporal i legitimació de l'excel.lència a la Segona Partida.

Resumen tomado del autor. Contiene nota bibliográfica al inicio del artículo, representaciones de Alfonso 'El Sabio', así como imágenes de los documentos originales de 'Las Siete Partidas'