Desenvolvimento sustentável e qualidade da água para consumo humano

A secção UAciência é coordenada pelo Professor Universitário Armindo Rodrigues.[…]. A viver no mundo desenvolvido, a preocupação do cidadão com os serviços de água foca-se sobretudo na qualidade da agua para consumo humano. A qualidade da água na torneira do consumidor e influenciada por diversos fatores, uns relacionados com o sistema de abastecimento (materiais em contacto com a água, operação do sistema, controlo do tratamento da água) e outros com a qualidade da agua na origem. Ora, os locais de armazenamento de água na natureza constituem um guardião de um bem precioso que, se for contaminado, muito dificilmente recuperará a qualidade original. Por essa razão, neste artigo, essa problemática será abordada. […].info:eu-repo/semantics/publishedVersio

Impact Of Construction And Reclamation Activities On The Water Quality Of The Thane Creek, Central-West Coast Of India

Degradation of natural resources is a major environmental issue the world is currently facing. Estuaries, creeks and coastal water ecosystems are such natural resources that are important as breeding and feeding grounds for fishes and crustaceans. Human activities and alterations made by reclamation have had an adverse effect on their ecology. Due to this, water quality management in these ecosystems has become a necessity. Regular studies of the hydrological parameters are essential for this purpose, as they can assess the status of pollution and help in deciding the mitigation strategy. Water quality of 26 km stretch of Thane creek, central-west coast of India was analyzed in 5 regions of the creek from May 1999 to April 2000. The study revealed spatial and temporal patterns. Heavy suspended solid load (avg. 5.736 gm/L), frequent hypoxia (DO<2.5 mg/L) coupled with excess nutrients like Phosphate-Phosphorus (avg. 0.26 mg/L) and Nitrate-Nitrogen (avg. 0.96 mg/L) were the main features of the creek. The Thane city region showed more deterioration of water quality compared to the other regions in the creek. In this region the suspended solid load showed an increase of 713.69% and dissolved oxygen decreased by 21.55% compared to the data of 1992-93. This can be attributed to the severe onslaught of activities in this region like solid waste dumping, construction of 3 new bridges, etc. since 1993, thereby affecting the flushing characteristic. Hence in order to protect and preserve such ecosystems, alterations to the environment should be meticulously planned

Dashbell: A Low-cost Smart Doorbell System for Home Use

Smart doorbells allow home owners to receive alerts when a visitor is at the door, see who the guest is, and communicate with the visitor from a smart device. They greatly improve people's life quality and contribute to the evolution of smart homes. However, the commercial smart doorbells are quite expensive, usually cost more than 190 US dollars, which is a substantial impediment on the pervasiveness of smart doorbells. To solve this problem, we introduce the Dashbell-a budget smart doorbell system for home use. It connects a WiFi-enabled device, the Amazon Dash Button, to a network and enables the home owner to answer the bell triggered by the dash button using a smartphone. The Dashbell system also enables fast fault detection and diagnosis due to its distributed framework.Comment: Accepted by IEEE PerCom 201

Os Dez Princípios de uma Boa Prática com TIC

A importância que actualmente se concede à integração das novas tecnologias na educação impõe uma reflexão sobre as práticas pedagógicas hoje vividas nas nossas escolas e a sua repercussão na educação. Este estudo tem como propósito compreender os efeitos das boas práticas e apresentar os 10 princípios de boas práticas com TIC escorados num estudo realizado com professores do 1º Ciclo do Ensino Básico na região do grande Porto. Esperamos assim contribuir para uma reflexão crítica sobre a inclusão das TIC e realçar o seu potencial na educação

Carving out new business models in a small company through contextual ambidexterity: the case of a sustainable company

Business model innovation (BMI) and organizational ambidexterity have been pointed out as mechanisms for companies achieving sustainability. However, especially considering small and medium enterprises (SMEs), there is a lack of studies demonstrating how to combine these mechanisms. Tackling such a gap, this study seeks to understand how SMEs can ambidextrously manage BMI. Our aim is to provide a practical artifact, accessible to SMEs, to operationalize BMI through organizational ambidexterity. To this end, we conducted our study under the design science research to, first, build an artifact for operationalizing contextual ambidexterity for business model innovation. Then, we used an in-depth case study with a vegan fashion small e-commerce to evaluate the practical outcomes of the artifact. Our findings show that the company improves its business model while, at the same time, designs a new business model and monetizes it. Thus, our approach was able to take the first steps in the direction of operationalizing contextual ambidexterity for business model innovation in small and medium enterprises, democratizing the concept. We contribute to theory by connecting different literature strands and to practice by creating an artifact to assist managemen

Desempenho de leitões na fase de creche alimentados em comedouro semi-automático ou manual

TCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Agrárias. Curso de Zootecnia.A suinocultura é uma atividade de grande importância na geração de proteína de origem animal. Os avanços tecnológicos neste setor possibilitaram a redução no tempo/espaço necessário para a produção gerando, com isto, um aumento na quantidade de carne produzida. Dentre as inovações neste setor os comedouros ganharam grande destaque devido à importância que os mesmo possuem para o desempenho e redução de custos da produção. O presente trabalho teve como objetivo comparar o desempenho de leitões na fase de creche, de 21 a 63 dias de vida, alimentados com comedouros convencionais com o arraçoamento manual em relação a leitões alimentados com comedouros semi-automáticos. Foram avaliados 576 leitões da genética Agroceres PIC divididos nos dois tratamentos com 48 repetições (baias) com seis animais cada. O delineamento experimental foi de blocos (sexo: macho e fêmeas) ao acaso, onde foram avaliados: o consumo de ração médio diário, ganho de peso médio diário e conversão alimentar. Os dados foram submetidos à análise de variância. Os leitões alimentados com fornecimento manual de ração apresentaram níveis mais elevado no consumo de ração médio diário e ganho de peso médio diário durante a fase de creche. Em relação à conversão alimentar os leitões que consumiram ração com fornecimento manual apresentaram melhores índices no período de 21 a 35 dias e de 57 a 63 dias comparados aos que receberam ração em comedouros semi-automáticos

Partial actions of weak Hopf algebras: smash products, globalization and Morita theory

In this paper we introduce the notion of partial action of a weak Hopf algebra on algebras, unifying the notions of partial group action [11], partial Hopf action ([2],[3],[9]) and partial groupoid action [4]. We construct the fundamental tools to develop this new subject, namely, the partial smash product and the globalization of a partial action, as well as, we establish a connection between partial and global smash products via the construction of a surjective Morita context. In particular, in the case that the globalization is unital, these smash products are Morita equivalent. We show that there is a bijective correspondence between globalizable partial groupoid actions and symmetric partial groupoid algebra actions, extending similar result for group actions [9]. Moreover, as an application we give a complete description of all partial actions of a weak Hopf algebra on its ground field, which suggests a method to construct more general examples.Comment: 27 page