An Exploration of Representation Learning and Sequential Modeling Approaches for Supervised Topic Classification in Job Advertisements

This thesis applies the explorative double diamond design process borrowed to iteratively frame a research problem applicable in the context of a recruitment web service and then find the best approach to solve it. Thereby the problem focus is laid on multi-class classification, in particular the task of labelling sentences in job advertisements with one of six topics which were found to be covered in every typical job description. A dataset is obtained for evaluation and conventional N-Gram Vector Space models are compared with Representation Learning approaches, notably continuous distributed representations, and Sequential Modeling techniques using Recurrent Neural Networks. Results of the experiments show that the Representation Learning and Sequential Modeling approaches perform on par or better than traditional feature engineering methods and show a promising direction in and beyond research in Computational Linguistics and Natural Language Processing

Consultants as intermediaries and mediators in the construction of information and communication technologies for development

This article considers the role of one actor that is in the ascendancy in the development sector, namely the multinational management consulting organization. Drawing on science and technology studies concepts, we argue that such consultants are increasing and important, yet relatively invisible intermediaries and mediators in the development sphere that justify critical examination. Empirically, we draw on secondary data relating to the shape and nature of consulting in the development sector and focus specifically on a report by a multinational consulting organization to illustrate our argument. Our discussion argues that consultants can be treated both as intermediaries, relays in a network of development provision, and as highly political mediators that seek to expand and stabilize their position in the development network and, in so doing, actively shape what we take development to be. Overall, we suggest that understanding the ways in which such actors engage in the development sphere are important to current and future discussions and developments in information and communication technologies for development (ICT4D)

Sorção/dessorção de cd(ii) na interface argilas - soluções aquosas

TCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Físicas e Matemáticas. Curso de Química.O estudo da biodisponibilidade de metais-traço no meio aquático depende do comportamento desses metais frente a frações dos sedimentos como o caso das argilas caolinita, montimorillonita e de seus componentes alumina e sílica gel. As isotermas de adsorção de Cd (II) em argilas minerais podem ser tratadas adequadamente com o modelo de Langmuir para adsorção em monocamada. Os resultados mostram que a presença de complexantes dificulta a adsorção, possibilitando a retirada de Cd (II) adsorvido da superfície do sedimento. A precipitação do Cd (II) em pH = 7,0 é influenciada pelo tampão utilizado. Usando tampão ácido cítrico/citrato, ocorre complexação do metal o que evita sua precipitação. Na presença de Tris obteve-se uma constante de Langmuir KL = 14,78 L.mmol-1, e capacidade de adsorção máxima de 3,17 g/kg de montmorillonita. O tampão ácido cítrico/citrato inibe a adsorção, mantendo Cd (II) em solução e, apenas 2,7 % da capacidade de adsorção da montmorillonita é utilizada. Resultados semelhantes foram observados usando caolinita. O efeito complexante do citrato permite estudar a dessorção do Cd (II) de diferentes adsorventes como montmorillonita e caolinita. Os resultados mostram que o Cd (II) está solubilizado em sítios de troca iônica ou de adsorção química na superfície destas argilas, mas no caso da montmorillonita parte do cádmio está adsorvida em sítios de adsorção no interior da mesma, o que é consistente com os dados físicos, já que a montmorillonita tem uma estrutura altamente microporosa. Em pH 7,00 e na ausência de ligantes orgânicos, as capacidades de adsorção determinadas para alumina, montmorillonita, caolinita 1 e caolinita 2 tratada e sílica foram de 4,4 g/kg, 3,17 g/kg, 2,20 g/kg, 1,34 g/kg

Information Systems Methodologies in Use

Research into information systems development (ISD) methodologies is generally restricted to the creation or elaboration of methodologies or the provision of CASE support. This paper proposes that a fruitful area of research, which will provide insights into the effectiveness of ISD methodologies, must centre on the observation of the practice of systems developers, users and managers, and the study of methodologies in use. Such a programme requires certain techniques, ideally longitudinal ethnographic case studies. Preliminary results from a couple of case studies indicate that ISD methodologies are not used as prescribed but this does not necessarily prevent the successful completion of development projects