3 research outputs found
Two Is Better Than One: Dual Embeddings for Complementary Product Recommendations
Embedding based product recommendations have gained popularity in recent
years due to its ability to easily integrate to large-scale systems and
allowing nearest neighbor searches in real-time. The bulk of studies in this
area has predominantly been focused on similar item recommendations. Research
on complementary item recommendations, on the other hand, still remains
considerably under-explored. We define similar items as items that are
interchangeable in terms of their utility and complementary items as items that
serve different purposes, yet are compatible when used with one another. In
this paper, we apply a novel approach to finding complementary items by
leveraging dual embedding representations for products. We demonstrate that the
notion of relatedness discovered in NLP for skip-gram negative sampling (SGNS)
models translates effectively to the concept of complementarity when training
item representations using co-purchase data. Since sparsity of purchase data is
a major challenge in real-world scenarios, we further augment the model using
synthetic samples to extend coverage. This allows the model to provide
complementary recommendations for items that do not share co-purchase data by
leveraging other abundantly available data modalities such as images, text,
clicks etc. We establish the effectiveness of our approach in improving both
coverage and quality of recommendations on real world data for a major online
retail company. We further show the importance of task specific hyperparameter
tuning in training SGNS. Our model is effective yet simple to implement, making
it a great candidate for generating complementary item recommendations at any
e-commerce website.Comment: Accepted at ICKG 202
Gharial (Gavialis gangeticus) conservation in Bardia National Park, Nepal: Assessing population structure and habitat characteristics along the river channel amidst infrastructure development
Abstract Nepal initiated numerous hydropower and irrigationârelated infrastructure projects to enhance and promote green energy, water security, and agricultural productivity. However, these projects may pose risks to natural habitats and the wellâbeing of aquatic fauna, leading to significant effects on delicate ecosystems. To understand these potential impacts, it is crucial to gather reliable baseline data on the population status and habitat characteristics of species. This study specifically focuses on Gharials (Gavialis gangeticus), a critically endangered species. We recorded data on preâdetermined habitat variables at stations spaced 500âm apart along the two major river streams of Bardia National Park, as well as at locations where Gharials were sighted between February and March 2023. We used binary logistic regression with a logit link function to investigate the habitat characteristics related to the occurrence of Gharials. The presence/absence of Gharials at sampling points served as the dependent variable, while 10 other predetermined variables (ecological variables and disturbance variables) served as independent variables. Our study recorded 23 Gharials, comprising 14 adults, six subâadults, and three juveniles, with a sex ratio of 55.56 males per 100 females. Most individuals (83%) were found basking. Among the 10 habitat predictors, three variables (midâriver depth, river width, and water temperature) were significantly correlated (pâ<â.05) with the probability of Gharial occurrence. The model shows that Gharial detection probability increases with greater midâriver depth and width and lower water temperature. This study establishes a population baseline for Gharials within the river system before the construction of large infrastructure projects, such as dams and irrigation canals. It also recommends continuous monitoring of Gharial populations after water release and/or diversion to evaluate the impact of large infrastructure projects on the population and their associated habitat characteristics. This will help enable more informed and targeted conservation efforts