Item feature refinement for improved content-based recommendation
The Department of Computer Science and Engineering is delighted to announce that Dr Abinash Pujahari, Assistant Professor, has published his research article “Item Feature Refinement using Matrix Factorization and Boosted Learning based User Profile Generation for Content-Based Recommender Systems” in the journal Expert Systems with Applications having an Impact Factor of 8.665. The research was done in collaboration with Dr Dilip Singh Sisodia, Assistant Professor, National Institute of Technology Raipur.
This research focuses on improving the quality of information available about the features of various items so that it can be used for content-based recommendations. Content-based recommender systems are used in many e-commerce platforms (e.g., NetFlix, Amazon Prime, etc.). Here, the item (i.e., movies, TV shows) feature information is compared with the users’ past behaviour to recommend similar things. This research enables such systems to study the feature information for more accurate recommendations.
Most of the items’ feature information is sparse, redundant, and inconsistent. Matrix Factorization is used to avoid such inconsistencies. Further, iterative learning of user profiles is used using boosted learning approach for model building. The proposed research is compared with state-of-the-art related works using benchmark datasets and can be implemented in most e-commerce platforms and online streaming service providers. Dr Pujahari looks forwards to employing the same in group recommender systems where individuals have their preferences, in his future research endeavours.
- Published in CSE NEWS, Departmental News, News, Research News
Dr Ipsita Pradhan selected for a seminar on Urban Ethnography and Theory in Italy
Recently, Assistant Professor Dr Ipsita Pradhan from the Department of Liberal Arts has been selected for the IUS Field Training School and Research Seminar on Urban Ethnography and Theory in Tuscany, Italy. The seminar was held from July 18 to 26, 2022.
This eight-day Field Training School and Research Seminar is addressed to researchers, who are interested in ethnographic research and empirically grounded analysis. It is organised and hosted by the International Urban Symposium-IUS in collaboration with an international group of senior scholars from European, Indian, Middle Eastern, and US Universities. The school offers an interactive learning environment and opportunities to discuss the rationale and practices of research methods and mainstream debates. Participants will have the opportunity to present their own research and receive feedback from leading scholars. The Teaching Seminars will focus on methodological and theoretical debates, benefiting from senior scholars’ wide range of ethnographic, methodological, and theoretical expertise.
- Published in Departmental News, Liberal Arts News, News
Dual-Band 2×2 Elements MIMO Antenna-Diplexer
Dr Divya Chaturvedi, Assistant Professor, from the Department of Electronics and Communication Engineering has been keenly pursuing research on wearable antennas that are used within the context of Wireless Body Area Networks. These antennas are commonly used in wearable wireless communication and bio-medical RF systems. Her latest publication “Design and Investigation of Dual-Band 2×2 Elements MIMO Antenna-Diplexer Based on Half-mode SIW” was featured in the Q1 journal, IEEE Access, having an Impact Factor of 3.37. The research was done in collaboration with Assistant Professor Dr Goutam Rana and Research Scholar Ms Buela Pramodini from the Department of Electronics and Communication Engineering.
This antenna is designed to enhance data rate twice as much as a single antenna. The antenna can be used to operate in two frequency bands simultaneously, without causing any interference. One frequency band can be used for the transmission of data while the other frequency band can be utilised for the reception of data. The radiating elements are configured in such a way that it occupies a compact size. Thus, the designed antenna can be easily mounted or integrated into a portable wireless electronic device. The field from one radiating element is not coupled to the other element due to their adequate isolation that mitigates the interference problem.
The dual-band self-diplexing 4-port MIMO antenna operates in the lower frequency band around 3.4 GHz (3.35-3.55 GHz, 160 MHz) for the TD-LTE system and in the higher frequency band around 4.2 GHz (4.14-4.34 GHz, 200 MHz) for FCC ID WLAN in 5G LTE communication. The electronic devices which operate in these frequency bands can enhance the data transmission and reception speed twice as much as a single element. In other words, the proposed design prototype also improves the reliability of communication by employing the spatial multiplexing technique. In future, they plan to work on the design and investigation of MIMO-based self-diplexing antenna using the polarization diversity technique.
Abstract of the Research
In this article, a compact dual-band, 2-elements antenna-diplexer is investigated and extended to a 2×2 multi-input and multi-output (MIMO) antenna. The proposed design employs half-mode Substrate Integrated Waveguide (HMSIW) technology, which reduces the antenna footprint by 50%. To enhance the bandwidth, a rectangular slot is engraved at the center of each HMSIW cavity. The slot splits the dominant mode of the HM cavity into two odd- and even-half TE110 modes in proximity, which leads to enhancement in the bandwidth by 50%. The antenna resonates around 3.4 GHz with a fractional bandwidth of 5% and around 4.3 GHz with a bandwidth of 4.7%, when corresponding ports are excited, respectively. Both the lower and upper frequency bands can be tuned individually, by simply altering the dimensions of each HMSIW cavity. This can be achieved in a common antenna, without employing filters, which satisfies the antenna-diplexer function. The isolation levels between any two radiating elements are obtained below -23 dB for the proposed MIMO antenna, and it occupies an overall size of 1.0λg × 0.8λg. The peak gain of the antenna is obtained at 5.35 dBi in the lower frequency band and at 6.75 dBi in the upper frequency band while radiation efficiency is better than 80% in both frequency bands.
- Published in Departmental News, ECE NEWS, News, Research News
Gendered work and contemporary India
Economic institutions, technological developments, cultural norms, religious and intellectual currents, and popular beliefs have always played a huge role in asserting clear boundaries between men’s and women’s work. The recent research paper of Assistant Professor Dr Ipsita Pradhan, Department of Liberal Arts, focuses on the transformation of gendered work in contemporary India. The paper is titled Women and the Changing Nature of Work in Hyderabad’s Hitec City and was published in the journal Sociological Bulletin.
Abstract
This article looks at the ways in which gendered work is being transformed in contemporary India by focussing on Hyderabad, the capital of Telangana. Since the mid-1990s, after India opened its doors to multinational agencies, new forms of gendered labour have manifested. One of the ramifications of this gendered process is the feminisation of labour that enabled the participation of more women in the workforce, engaging in activities that were low-paid. The basis of feminisation is that certain jobs require fewer skills or particular kinds of skills, for which women are thought to be suitable. This also has implications for the low bargaining power of women workers. The feminisation of the labour force in HITEC city, Hyderabad is a consequence of the changing labour markets with globalisation, offshore factories, migration, and other changes in the workplace.
- Published in Departmental News, Liberal Arts News, News, Research News