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1 [CT160]

[CT160]

[00301] On some modifications in the conjugate gradient method and its application in unconstrained optimization problems

Session Date & Time : 3E (Aug.23, 17:40-19:20)
Type : Contributed Talk
Abstract : Conjugate gradient (CG) methods are preferably used to solve large-scale unconstrained optimization problems due to strong local and global convergence properties and low memory requirements. To enhanse its convergence, we introduce an improved hybrid form of the conjugate gradient method in this work. We propose a new form of CG parameter (βk), combining the Fletcher Reeves (FR) and three-term search directions. Our proposed search directions formula satisfies the sufficient descent condition independent of any line search and are bounded. For the global convergence, some proper assumptions on the objective function and its gradient have been taken into account, which fulfills the strong Wolfe-Powell line search conditions. Finally, numerical experiments have been carried out on some standard benchmark test functions and compared with other CG methods from the literature to check the validity of the proposed algorithm. Numerical results guarantee the efficiency and robustness of our proposed CG method.
Classification : 90-XX, 90C26, 90C30, 90bxx, 90-08
Author(s) :
- Sweta Kumari (Birla Institute of Technology Mesra, Ranchi)
- Darakhshan Jabeen Syeda (Birla Institute of Technology Mesra, Ranchi)

[02381] Dynamic parking pricing for smart urban transportation system

Session Date & Time : 3E (Aug.23, 17:40-19:20)
Type : Contributed Talk
Abstract : Traffic jam is one of the critical challenges of an urban city. Researchers have reported that search for a parking space significantly contributes to this problem. By having a dynamic pricing depending on the demand, this challenge can partially be addressed by filtering customers to move to other non-demanding parking spaces or look for cost reasonable options. Furthermore, parking places will compete to maximize their profit. Hence, a game theoretic or hierarchical decision making model can best describe the scenario. Bounded by the allowed maximum parking pricing, perhaps set by the city administration, and the minimum price to stay in business, this paper models a dynamic parking pricing as a price-wise continuous multilevel decision making problem.
Classification : 90-XX, 90B06, 00A69
Author(s) :
- Surafel L Tilahun (Addis Ababa Science and Technology University)

[00233] Revisiting Businesses Vulnerability and Classifying the Main Problems of MSMEs During the COVID-19 Pandemic

Session Date & Time : 3E (Aug.23, 17:40-19:20)
Type : Contributed Talk
Abstract : Design/methodology/approach: This paper recalculates the MSME business vulnerability index in 503 districts and 34 provinces in Indonesia using Principal Component Analysis. Then, we conducted in-depth interviews with MSME actors in Medan, Central Java, Yogyakarta, Bali, and Manokwari West Papua and discussed how they could survive the COVID-19 pandemic and the extent of digital literacy, technology application to maximize sales and business. Purpose: We conducted the knowledge management of MSME actors for business, agriculture, and industry sectors with the in-depth interview result using text mining Latent Dirichlet Allocation Mallet to obtain information on their problems. Findings: For the sake of sustainability, the Penta-Helix collaboration is needed to get the best solution to the COVID-19 problem for the new normal and especially for Micro, Small, and Medium Enterprises’ business activities. Originality/value: From the results of a deep survey of MSMEs involved in this research, which covers three sectors, namely agriculture, trade, and processing, there are 7 (58.33\%) of them experienced a decrease in income during the pandemic, 12.66\% experiencing an increase in revenue, and 25\% did not experience changes in income before and during the pandemic.
Classification : 91C20, 62H25, 91B44, 68P01, Data Science, Sustainable Development Goals
Author(s) :
- Rezzy Eko Caraka (Badan Riset dan Inovasi Nasional)

[02661] Practicing Responsible Computation and Innovation in HPC: A Sociotechnical Approach

Session Date & Time : 3E (Aug.23, 17:40-19:20)
Type : Industrial Contributed Talk
Abstract : Recent advances in high performance computing (HPC) and artificial intelligence (AI) have reignited discussions for more responsible and ethical computing regarding the use and design of HPC sociotechnical ecosystems within the context of cultures and evolving societal norms. This contributed talk provides practical guidelines derived from computational and social science that scientists, educators, and practitioners alike can employ to become more aware of personal values that may unconsciously shape approaches to computation and ethics.
Classification : 91C99, 68-01, 68-04, 68N01, ethics, sociotechnical approach, responsible computing
Author(s) :
- Elaine M. Raybourn (Sandia National Laboratories)
- Osni Marques (Lawrence Berkeley National Laboratory)
- Killian Muollo (Sandia National Laboratories)

[01303] Partially Mixed Cooperative Strategies in Evolutionary Games on Networks

Session Date & Time : 3E (Aug.23, 17:40-19:20)
Type : Contributed Talk
Abstract : Cooperation is fundamental for the development of human societies. Different approaches have been proposed to explain the emergence of cooperation or partial cooperation in populations of individuals playing classical types of games. In this talk, we analyze the emergence of a new kind of cooperation, where we have a set of full cooperators and one of the partial ones, for the classical games. We prove conditions for Nash equilibria to be asymptotically stable.
Classification : 91CXX
Author(s) :
- Jean Carlo Moraes (Universidade Federal do Rio Grande do Sul)