Low Resource Neural Machine Translation: Assamese to/from Other Indo-Aryan (Indic) Languages

Machine translation (MT) systems have been built using numerous different techniques for bridging the language barriers. These techniques are broadly categorized into approaches like Statistical Machine Translation (SMT) and Neural Machine Translation (NMT). End-to-end NMT systems significantly outperform SMT in translation quality on many language pairs, especially those with the adequate parallel corpus. We report comparative experiments on baseline MT systems for Assamese to other Indo-Aryan languages (in both translation directions) using the traditional Phrase-Based SMT as well as some more successful NMT architectures, namely basic sequence-to-sequence model with attention, Transformer, and finetuned Transformer. The results are evaluated using the most prominent and popular standard automatic metric BLEU (BiLingual Evaluation Understudy), as well as other well-known metrics for exploring the performance of different baseline MT systems, since this is the first such work involving Assamese. The evaluation scores are compared for SMT and NMT models for the effectiveness of bi-directional language pairs involving Assamese and other Indo-Aryan languages (Bangla, Gujarati, Hindi, Marathi, Odia, Sinhalese, and Urdu). The highest BLEU scores obtained are for Assamese to Sinhalese for SMT (35.63) and the Assamese to Bangla for NMT systems (seq2seq is 50.92, Transformer is 50.01, and finetuned Transformer is 50.19). We also try to relate the results with the language characteristics, distances, family trees, domains, data sizes, and sentence lengths. We find that the effect of the domain is the most important factor affecting the results for the given data domains and sizes. We compare our results with the only existing MT system for Assamese (Bing Translator) and also with pairs involving Hindi.

Родословная бурят хоринского рода харгана: на материале тибетоязычной автобиографии Галсан-Жинбы Дылгырова (1816–1872?)

Introduction. In the modern Buryat society, the knowledge of one’s own history, roots, culture, and language is becoming increasingly important. There is also a growing interest in genealogical research as many have started to search for data about their ancestors and their family trees in various archives. To illustrate, one may mention an increasing number of requests made for materials on the lineage and pedigrees of Buryats kept in the Center of Oriental Manuscripts and Xylographs of the Institute for Mongolian, Buddhist, and Tibetan Studies of the Siberian Branch of the RAS. The aims of the present article are, firstly, to add to the data on the Khargana clan of Khori Buryats and, secondly, to investigate the background of Galsan-Zhinba Dylgirov (1816–1872?), an outstanding Buryat religious enlightener of the nineteenth century. The research is based on textological, comparative-historical and historical-biographical methods. Data. The article draws on the evidence contained in Dylgirov’s autobiography written in Tibetan in 1864-1872 and xylographed in the Tsugol Datsan. Dylgirov’s lineage is cited in the first chapter of the book and could be read only by few of those who were literate in Tibetan. Results. The lineage goes back to eight generations, including Dylgirov himself, and covers over 150 years. The origin of the family associates with the ancestor known as Shonoguleg who lived at the turn of the eighteenth century. Of particular interest are also legends and stories that supplement the family history. The examination of the lineage sheds light on the origin of the ethnonym Baatarzhan, a branch of the Khargana clan. Also, the family history contains new data on the Buryat self-governing administration before the first third of the nineteenth century. Clearly, the data of Dylgirov’s autobiography may be useful for further genealogical research.

ANCESTRY AND FAMILY IDENTITY IN SUETONIUS’ CAESARS

Suetonius’ Lives of the Caesars usually begin with a family tree. These family trees are often rhetorical, foreshadowing in the ancestors character traits that will be themes of the rest of the Life. This particular rhetorical strategy relies upon an older phenomenon of ‘family identity’—namely, the literary application of similar characteristics to people in the same family—such as the one that tells us that the Claudii are proud and the Domitii Ahenobarbi are ferocious. Gary Farney studied ‘family identity’ as a phenomenon of the Republic. There, it was the association of a family with a certain characteristic, a kind of ‘branding’. It would be perfectly obvious for Suetonius to use the family identities already in use for well-known families, but, as I show here, Suetonius’ selection of ancestors creates different family identities rather than simply using the traditional ones he would have found in other sources. In this study I concentrate on Nero and Tiberius. I focus on these two emperors because they are individuals where there is a known family identity in other sources and they also have the most detailed and elaborate ancestry sections in Suetonius’ Caesars. Family identity seems to be most interesting to Suetonius when it goes against expectations, and that is when Suetonius’ family trees are most elaborate.

DISCO: Species Tree Inference using Multicopy Gene Family Tree Decomposition

Species tree inference from gene family trees is a significant problem in computational biology. However, gene tree heterogeneity, which can be caused by several factors including gene duplication and loss, makes the estimation of species trees very challenging. While there have been several species tree estimation methods introduced in recent years to specifically address gene tree heterogeneity due to gene duplication and loss (such as DupTree, FastMulRFS, ASTRAL-Pro, and SpeciesRax), many incur high cost in terms of both running time and memory. We introduce a new approach, DISCO, that decomposes the multi-copy gene family trees into many single copy trees, which allows for methods previously designed for species tree inference in a single copy gene tree context to be used. We prove that using DISCO with ASTRAL (i.e., ASTRAL-DISCO) is statistically consistent under the GDL model, provided that ASTRAL-Pro correctly roots and tags each gene family tree. We evaluate DISCO paired with different methods for estimating species trees from single copy genes (e.g., ASTRAL, ASTRID, and IQ-TREE) under a wide range of model conditions, and establish that high accuracy can be obtained even when ASTRAL-Pro is not able to correctly roots and tags the gene family trees. We also compare results using MI, an alternative decomposition strategy from Yang Y. and Smith S.A. (2014), and find that DISCO provides better accuracy, most likely as a result of covering more of the gene family tree leafset in the output decomposition. [Concatenation analysis; gene duplication and loss; species tree inference; summary method.]

Social Science Pedagogy as a Way of Integrating Sustainable Education and Global Citizenship into the Initial Training of Pre-Primary Teachers

The main objective of this research was to demonstrate the integration of international and national strategies in education for sustainable development and global citizenship into initial teacher training. The researchers analyzed the outcomes of a feminist teaching strategy based on family trees, focusing on the usefulness of social science pedagogy in developing critical thinking among pupils. They also attempted to enhance teachers’ digital literacy and make progress in reflecting on its functioning and use. The research used mixed methods, and the research instrument was a questionnaire using Likert-type scales validated by specialists from several universities. It was deployed in the module Didáctica del Conocimiento del Medio Social y Medioambiental (Pedagogy of Knowledge of the Social and Cultural Environment) of the Bachelor’s Degree in Pre-Primary Education at the University of Alicante. Using historical research with a gender perspective, the trainee teachers investigated their family trees, focusing on the women in their families. They also carried out a speculative exercise to aid reflection on their contributions as teachers in support of equal education. The results obtained showed that this was a novel and useful educational activity, which inspired participants to work for a fair and democratic global citizenship based on coeducation.