581 research outputs found
Teaching a New Dog Old Tricks: Resurrecting Multilingual Retrieval Using Zero-shot Learning
While billions of non-English speaking users rely on search engines every
day, the problem of ad-hoc information retrieval is rarely studied for
non-English languages. This is primarily due to a lack of data set that are
suitable to train ranking algorithms. In this paper, we tackle the lack of data
by leveraging pre-trained multilingual language models to transfer a retrieval
system trained on English collections to non-English queries and documents. Our
model is evaluated in a zero-shot setting, meaning that we use them to predict
relevance scores for query-document pairs in languages never seen during
training. Our results show that the proposed approach can significantly
outperform unsupervised retrieval techniques for Arabic, Chinese Mandarin, and
Spanish. We also show that augmenting the English training collection with some
examples from the target language can sometimes improve performance.Comment: ECIR 2020 (short
Protection of enviroment under the Italian constitution
Resulta difícil dar una definición de lo que es el medioambiente como objeto de tutela
jurídica, y tanto más cuando asistimos a continuos cambios de tendencia en la materia por
parte del legislador. El artículo pretende hacer un repaso de cuáles han sido las consideraciones
en la literatura jurídica italiana sobre el concepto de medioambiente a la luz de los
artículos 9 y 32 de la Constitución de 1942.It is not a simple task to give a
definition of what the environment as an object of legal protection is, specially when we have
witnessed continuous changes of trend in the legislation about the concept. The article aims
to review what have been the considerations in the Italian legal literature on the concept of
environment in the light of articles 9 and 32 of the Constitution of 1942
Query Expansion for Survey Question Retrieval in the Social Sciences
In recent years, the importance of research data and the need to archive and
to share it in the scientific community have increased enormously. This
introduces a whole new set of challenges for digital libraries. In the social
sciences typical research data sets consist of surveys and questionnaires. In
this paper we focus on the use case of social science survey question reuse and
on mechanisms to support users in the query formulation for data sets. We
describe and evaluate thesaurus- and co-occurrence-based approaches for query
expansion to improve retrieval quality in digital libraries and research data
archives. The challenge here is to translate the information need and the
underlying sociological phenomena into proper queries. As we can show retrieval
quality can be improved by adding related terms to the queries. In a direct
comparison automatically expanded queries using extracted co-occurring terms
can provide better results than queries manually reformulated by a domain
expert and better results than a keyword-based BM25 baseline.Comment: to appear in Proceedings of 19th International Conference on Theory
and Practice of Digital Libraries 2015 (TPDL 2015
A 12GHz 30mW 130nm CMOS Rotary Travelling Wave Voltage Controlled Oscillator
This paper reports a 12GHz Rotary Travelling Wave (RTW) Voltage Controlled Oscillator designed in a 130nm CMOS technology. The phase noise and power consumption
performances were compared with the literature and with telecommunication standards for broadcast satellite applications. The RTW VCO exhibits a -106dBc/Hz@1MHz and a 30mW
power consumption with a sensibility of 400 MHz/V. Finally, requirements are given for a PLL implementation of the RTW VCO and simulated results are presented
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