Digital Commons Network^™

Smart Hpa: A Resource-Efficient Horizontal Pod Auto-Scaler For Microservice Architectures, Hussain Ahmad, Christoph Treude, Markus Wagner, Claudia Szabo

Research Collection School Of Computing and Information Systems

Microservice architectures have gained prominence in both academia and industry, offering enhanced agility, reusability, and scalability. To simplify scaling operations in microservice architectures, container orchestration platforms such as Kubernetes feature Horizontal Pod Auto-scalers (HPAs) designed to adjust the resources of microservices to accommodate fluctuating workloads. However, existing HPAs are not suitable for resourceconstrained environments, as they make scaling decisions based on the individual resource capacities of microservices, leading to service unavailability and performance degradation. Furthermore, HPA architectures exhibit several issues, including inefficient data processing and a lack of coordinated scaling operations. To address these concerns, we propose Smart HPA, a …

Efficient Cross-Modal Video Retrieval With Meta-Optimized Frames, Ning Han, Xun Yang, Ee-Peng Lim, Hao Chen, Qianru Sun

Research Collection School Of Computing and Information Systems

Cross-modal video retrieval aims to retrieve semantically relevant videos when given a textual query, and is one of the fundamental multimedia tasks. Most top-performing methods primarily leverage Vision Transformer (ViT) to extract video features [1]-[3]. However, they suffer from the high computational complexity of ViT, especially when encoding long videos. A common and simple solution is to uniformly sample a small number (e.g., 4 or 8) of frames from the target video (instead of using the whole video) as ViT inputs. The number of frames has a strong influence on the performance of ViT, e.g., using 8 frames yields better …

Applicability And Challenges Of Indoor Localization Using One-Sided Round Trip Time Measurements, Quang Hai Truong, Xi Kai Justin Lam, Guru Anand Anish, Rajesh Krishna Balan

Research Collection School Of Computing and Information Systems

Radio Frequency fingerprinting, based on WiFi or cellular signals, has been a popular approach for localization. However, adoptions in real-world applications have confronted with challenges due to low accuracy, especially in crowded environments. The received signal strength (RSS) could be easily interfered by a large number of other devices or strictly depends on physical surrounding environments, which may cause localization errors of a few meters. On the other hand, the fine time measurement (FTM) round-trip time (RTT) has shown compelling improvement in indoor localization with ~1-2 meter accuracy in both 2D and 3D environments [13]. This method relies on the …

Refining Chatgpt-Generated Code: Characterizing And Mitigating Code Quality Issues, Yue Liu, Thanh Le-Cong, Ratnadira Widyasari, Chakkrit Kla Tantihamthavorn, Li Li, Xuan-Bach Dinh Le, David Lo

Research Collection School Of Computing and Information Systems

Since its introduction in November 2022, ChatGPT has rapidly gained popularity due to its remarkable ability in language understanding and human-like responses. ChatGPT, based on GPT-3.5 architecture, has shown great promise for revolutionizing various research fields, including code generation. However, the reliability and quality of code generated by ChatGPT remain unexplored, raising concerns about potential risks associated with the widespread use of ChatGPT-driven code generation.In this article, we systematically study the quality of 4,066 ChatGPT-generated programs of code implemented in two popular programming languages, i.e., Java and Python, for 2,033 programming tasks. The goal of this work is threefold. First, …

The Low-Carbon Vehicle Routing Problem With Dynamic Speed On Steep Roads, Jianhua Xiao, Xiaoyang Liu, Huixian Zhang, Zhiguang Cao, Liujiang Kang, Yunyun Niu

Research Collection School Of Computing and Information Systems

The low-carbon vehicle routing problem with dynamic speeds on steep roads (LCVRPDS-SR) considers the combined effects of dynamic speeds, steep roads, and loads on carbon emissions. Earlier low-carbon vehicle routing problems typically assumed that vehicles travel at a constant speed on flat roads. However, such models do not apply in urban or rural areas with steep roads. Although the subsequent studies further explored the effect of steep roads, their performance are still suboptimal since they fail to take into account the varying speeds on the terrain. This paper proposes an extended LCVRPDS-SR model that tackles dynamic speed decisions on steep …

Posmlp-Video: Spatial And Temporal Relative Position Encoding For Efficient Video Recognition, Yanbin Hao, Diansong Zhou, Zhicai Wang, Chong-Wah Ngo, Xiangnan He, Meng Wang

Research Collection School Of Computing and Information Systems

In recent years, vision Transformers and MLPs have demonstrated remarkable performance in image understanding tasks. However, their inherently dense computational operators, such as self-attention and token-mixing layers, pose significant challenges when applied to spatio-temporal video data. To address this gap, we propose PosMLP-Video, a lightweight yet powerful MLP-like backbone for video recognition. Instead of dense operators, we use efficient relative positional encoding (RPE) to build pairwise token relations, leveraging small-sized parameterized relative position biases to obtain each relation score. Specifically, to enable spatio-temporal modeling, we extend the image PosMLP’s positional gating unit to temporal, spatial, and spatio-temporal variants, namely PoTGU, …

Physician-Patient Interactions In Online Healthcare Communities: The Effects Of Preconsultation On Service Delivery And Patient Satisfaction, Qian Tang, Anqi Zhao

Research Collection School Of Computing and Information Systems

Preconsultation by medical professionals is a common practice in offline healthcare services to improve consultation efficiency but is rarely adopted for online healthcare services. In a noteworthy departure from this trend, a Chinese online healthcare community (OHC) has instituted preconsultation by assistant physicians prior to online consultations. Using comprehensive service data from this OHC, this study scrutinizes the effects of preconsultation on online healthcare services from both the physician and patient perspectives. The findings reveal that preconsultation by the assistant physician can significantly increase the attending physician’s response speed, length, and provision of informational support, while maintaining a consistent level …

More Human-Likeness, Less Self-Disclosure? Avatars' Form Realism And Job Applicants' Self-Disclosure In Ai Interviews, Yamin Xu, Keng Siau, Fiona Fui-Hoon Nah

Research Collection School Of Computing and Information Systems

The rise of AI in recruitment promises to revolutionize how organizations evaluate job candidates. The quality of AI evaluations is determined by the input data, which depends on job applicants' self-disclosure. However, little is known about how the design elements of AI interview systems, particularly avatar interviewers, influence job applicants' self-disclosure during these interactions. This study aims to address this gap by specifically focusing on how the form realism of avatar interviewers affects job applicants' self-disclosure through their perceptions. In addition, the study will examine the effects of job type as a moderator. Drawing on the Stimulus-Organism-Response (S-O-R) model, this …

Pkt-Sin: A Secure Communication Protocol For Space Information Networks With Periodic K-Time Anonymous Authentication, Yang Yang, Wenyi Xue, Jianfei Sun, Guomin Yang, Yingjiu Li, Hwee Hwa Pang, Robert H. Deng

Research Collection School Of Computing and Information Systems

Space Information Network (SIN) enables universal Internet connectivity for any object, even in remote and extreme environments where deploying a cellular network is difficult. Access authentication is crucial for ensuring user access control in SIN and preventing unauthorized entities from gaining access to network services. However, due to the complex communication environment in SIN, including exposed links and higher signal delay, designing a secure and efficient authentication scheme presents a significant challenge. In this paper, we propose a secure communication protocol for SIN with periodic k-time anonymous authentication (named PkT-SIN) that allows satellite users to anonymously authenticate to ground stations …

The Research Of The Non-Financial Factors In The Investment Decision, Wenbiao Hou

Dissertations and Theses Collection (Open Access)

Driven by globalization and technological innovation, the complexity of investment decisions is continuously increasing. While traditional financial factors still play a crucial role in these decisions, an increasing number of real-life cases indicate that investors are relying more on non-financial factors. This paper systematically analyzes the impact of these non-financial factors in the framework of investment decision-making.

This paper employs a mixed research method, incorporating both qualitative and quantitative analyses to ensure comprehensive coverage of the topic. First, it outlines the theoretical basis and development of non-financial factors in investment decisions through a review of prior literature. Next, it collects …

Towards Faster Inference Of Transformers: Strategies For Accelerating Decoding Processes, Cunxiao Du

Dissertations and Theses Collection (Open Access)

This thesis delves into the acceleration and optimization of Transformer inference, a subject of increasing importance with the emergence of Large Language Models (LLMs). The study primarily addresses the challenges posed by two inherent properties of Transformers during inference: the quadratic complexity of the attention mechanism and the sequential nature of autoregressive inference. The research is structured into three main parts. The first part enhances the learning capabilities of non-autoregressive Transformers, achieving a remarkable 15.0x acceleration on machine translation tasks. The following section focuses on lossless acceleration through speculative decoding, where the proposed algorithm, Glide with CAPE, is shown to …

Marketing Budgeting In The Upper Echelons, Junqiu Jiang

Dissertations and Theses Collection (Open Access)

Marketing professionals and academics frequently highlight the challenges of obtaining and protecting the marketing budget. However, prior academic research predominantly focusses on the optimal allocation of a given marketing budget, with little attention directed towards understanding the organizational process of securing approval for the marketing budget. Accordingly, this dissertation addresses this gap with two essays examining the marketing budgeting process by drawing on the theories-in-use (TIU) of both Chief Marketing Officers (CMOs) seeking approval for the marketing budget, and Chief Executive Officers (CEOs) approving the marketing budget. In Essay 1, I explore the objectives of both CMOs and CEOs …

The Effect Of Culture On Paying And Playing Free-To-Play Mobile Games: A Comparative Study Between China And The Usa, Erik Eugene Ford

Dissertations and Theses Collection (Open Access)

In this dissertation, the effect of culture on consumers’ desire to pay for and play free-to-play (F2P) mobile games was examined. Culture can be defined as the “collective programming of the mind that distinguishes the members of one group of categories of people from others” (Hofstede, 2011). The study compared consumers in China and the United States who completed an online survey. Cultural scientists such as Hall and Hofstede defined these two countries as the two largest gaming markets in the world with very different cultures. The research method included a questionnaire. The sample size was 201 people in China …

Unpacking The Behavioral, Cognitive, Sleep, And Stress Associations With Smartphone Checking, Yi Jing Chua

Dissertations and Theses Collection (Open Access)

The widespread use of smartphones for various daily activities has led many users to habitually check their devices. Smartphone checking may be negatively associated with daily behavioural, health, affective, and cognitive outcomes when it interrupts individuals during their work, health, and well-being-enhancing pursuits. Yet, research on smartphone checking suffers from various research gaps, including the use of cross-sectional design which hinder interpretation of the direction of relationship between smartphone checking and daily outcomes, the presence of individual difference confounds, and relying on subjective smartphone checking measures that are susceptible to recall biases. To address these gaps, the study investigated the …

Opportunity Or Exploitation? A Longitudinal Dyadic Analysis Of Flexible Working Arrangements And Gender Household Labor Inequality, Senhu Wang, Cheng Cheng

Research Collection School of Social Sciences

It has been extensively debated over whether the rise of flexible working arrangements (FWAs) may be an “opportunity” for a more egalitarian gender division of household labor or reinforce the “exploitation” of women in the traditional gender division. Drawing on a linked-lives perspective, this study contributes to the literature by using longitudinal couple-level dyadic data in the UK (2010–2020) to examine how couple-level arrangements of flexible working affect within-couple inequality in time and different types of household labor. The results show that among heterosexual couples, women’s use of FWAs significantly intensifies their disproportionate share of housework and maintains their heavy …

Mobility Repertoires: How Chinese Overseas Students Overcame Pandemic-Induced Immobility, Jiaqi M. Liu, Rui Jie Peng

Research Collection School of Social Sciences

The burgeoning field of immobility studies focuses on how migratory aspirations and capabilities shape a given (im)mobility status but devotes scant attention to how people traverse different (im)mobility categories. Through a case study of Chinese students in the United States during the COVID-19 pandemic, this article develops two arguments to shed light on migrants’ experiences and strategies in mobility transitions. First, during the pandemic, while China's restrictive travel policies and unfavorable public discourses made return migration extremely difficult, Chinese overseas students also felt unwelcome in the United States, due to visa restrictions and Sinophobic violence. This dilemma of being unable …

A Dual-Angle Exploration Towards Understanding Lapses In Covid-19 Social Responsibility, Sean T. H. Lee, Jerome J. X. Mah, Angela K. Y. Leung

Research Collection School of Social Sciences

Breaking infection chains requires not just behaviours that allow individuals to stay healthy and uninfected (i.e. health protective behaviours) but also for those who are possibly infected to protect others from their harboured infection risk (i.e. socially responsible behaviours). However, socially responsible behaviours entail costs without clear, immediate benefits to the individual, such that public health-risking lapses occur from time to time. In this important yet understudied area, the current exploratory study sought to identify possible psychological factors that may affect people's likelihood of engaging in socially responsible behaviours. Assuming that self-perceived infection should provide an impetus to engage in …

Conventionalization Of Alternative Agriculture And The Intervention Of External Investors: Case Sharing Community-Supported Agriculture Farm, China, Meiling Wu

Research Collection School of Social Sciences

The trend of alternative farmers adopting conventional farming methods, known as conventionalization, has become increasingly prevalent. External investment can be a catalyst for the conventionalization of alternative agriculture. The study seeks to examine the dynamics through which external investment and investors facilitate the conventionalization of alternative agriculture. A study was conducted on a Sharing Community Supported-Agriculture (CSA) Farm, with data being gathered through semi-structured interviews and analyzed using thematic methods. The findings indicated that (1) the low economic sustainability of Sharing CSA Farm leads to an influx of external investment; (2) external investors compel the farm manager to relax adherence …

Do Cognitive Resources Matter For Eudaimonia? The Role Of Inhibitory Control In Psychological Well-Being, Wei Xing Toh, Hwajin Yang

Research Collection School of Social Sciences

Although past work has investigated the psychosocial and biological correlates of psychological well-being (PWB), little is known regarding the cognitive underpinnings of PWB. Given that prior research has predominantly relied on indices of general cognitive abilities and PWB, we examined the relations between Ryff’s (1989) six-factor model of PWB and inhibitory control (i.e. the ability to actively maintain pertinent goals by resisting interference from irrelevant information or prepotent responses). Using structural equation modelling (N = 170), based on three inhibition measures and six facets of PWB, we found that better inhibitory control was associated with greater personal growth, when cognitive, …

Producers’ Transition To Alternative Food Practices In Rural China: Social Mobilization And Cultural Reconstruction In The Formation Of Alternative Economies, Qian Forrest Zhang

Research Collection School of Social Sciences

The shift from the conventional agri-food system to alternative practices is a challenging transition for agricultural producers, yet surprisingly under-studied. Little research has examined the social and cultural processes in rural communities that mobilize producers and construct and sustain producer-driven alternative food networks (AFNs). For AFNs to go beyond just offering “alternative foods” or “alternative networks” and to be constructed as “alternative economies”, this transformation in the producer community is indispensable. This paper presents a case study of a rural cooperative in Shanxi, China. The discontent with both productivist agriculture and the social decay in communities motivated a group of …

Silver Screen Reversals Of The Domino Theory: American Cold War Movies And The Re-Imagination Of British Experiences In Southeast Asia, Wen-Qing (Wei Wenqing) Ngoei

Research Collection School of Social Sciences

This essay examines how Hollywood was affected by the successful anticommunism of Britain and its local allies in Malaya and Singapore, victories that unfolded alongside Vietnam’s mounting crisis in the early 1960s. It shows that American movies of this era which portrayed the intertwining of US and British experiences in 1950s Malaya and 1940s Singapore conveyed an uneasy yet clear optimism about U.S. involvement in Southeast Asia.

The Arts As A Value-Creating Ecology In Singapore, Su Fern Hoe

Research Collection School of Social Sciences

This chapter aims to provide a deeper understanding of the evolving state of politics and practices of the arts ecology in Singapore from 2012 to 2023. This period was selected primarily because Singapore’s most recent cultural policy – the Arts and Culture Strategic Review – was officially released in 2012, and has since introduced changes and shifts that have yet to be adequately documented and analysed. However, this chapter is not intended to be comprehensive in nature.This chapter has two key objectives. First, it will critically interrogate the nature, extent and implications of the Singapore government’s efforts in utilising the …

Policy Design For Biodiversity: How Problem Conception Drift Undermines "Fit-For-Purpose" Peatland Conservation, Benjamin Cashore, Ishani Mukherjee, Altaf Virani, Lahiru S. Wijedasa

Research Collection School of Social Sciences

For over two decades, scientists have documented the alarming decline of global Peatland ecosystems, regarded as the planet’s most crucial carbon sinks. The deterioration of these unique wetlands alongside their policy attention presents a puzzle for policy scientists and for students of anticipatory policy design. Two contrasting explanations have emerged. Some argue that pressures from economic globalization compel governments to relax environmental standards, while others point to deficiencies in policy design and implementation. Our paper applies Cashore’s Four Problem Types framework to assess a more nuanced explanation: that failure of global and local policies to curb ecosystem degradation is owing …

A Daily Diary Investigation Of The Fear Of Missing Out And Diminishing Daily Emotional Well-Being: The Moderating Role Of Cognitive Reappraisal, Andree Hartanto, Joax Wong, Verity Yu Qing Lua, Yue Qi Germaine Tng, K. T. A. Sandeeshwara Kasturiratna, Nadyanna M. Majeed

Research Collection School of Social Sciences

With modern societies becoming ever-increasingly interconnected due to technology and media, we have gained unprecedented access and exposure to other people’s lives. This has resulted in a greater desire to constantly be socially connected with the activities of others, or the fear of missing out (FoMO). While much of the present available research has established the association between FoMO and diminished emotional well-being, little has been done to identify protective factors that can help one cope with the negative psychological consequences of FoMO. Utilizing data from a 7-day diary study of a large sample of young adults (N = 261), …

Humanities And Social Sciences: Everything, Everywhere, All At Once, Lily Kong

Research Collection School of Social Sciences

In a commentary, SMU President Professor Lily Kong discussed the importance of the social sciences and humanities, and explained how they significantly impact our daily routines and life choices. She emphasised the need for scholars of social sciences and humanities to expand channels of communication and engagement with diverse audiences. They should share insights and findings, collaborate across disciplines and sectors, and harness the synergies and complementarities of different perspectives and approaches. Prof Kong opined that for Singapore, the disciplines constitute a collective strategic asset that will enable the country to move forward into a more equitable, sustainable, and compassionate …

Implicit Commitments To Workplace Environment And Corporate Information Production: Evidence From Indoor Environment Quality, Summer Rui Huang, Leonard Leye Li, Louise Yi Lu, Rencheng Wang

Research Collection School Of Accountancy

This study investigates the effect of a firm’s indoor environment quality (IEQ) on its information production. Leveraging a third-party sustainability building rating system that provides IEQ scores for office buildings, we first show that employees in a firm’s headquarters with better IEQ scores are more likely to leave positive building-related feedback on Glassdoor, indicating employees’ recognition and appreciation of a workplace with superior IEQ. Next, we find robust evidence that firms headquartered in buildings with better IEQ issue more frequent and more accurate management forecasts. Furthermore, we show that a firm’s commitment to better IEQ (1) enhances occupational wellbeing of …

Does Generative Ai Facilitate Investor Trading? Evidence From Chatgpt Outages, Qiang Cheng, Pengkai Lin, Yue Zhao

Research Collection School Of Accountancy

In this paper, we use ChatGPT outages to investigate whether investors rely on generative artificial intelligence (GAI) to perform trading-related tasks and the associated impact on stock price informativeness. We first document a significant decline in stock trading volume during ChatGPT outages and find that the effect is stronger for firms with corporate news released immediately before or during the outages. We further document similar declines in the short-run price impact, return variance, and bid-ask spreads, consistent with a reduction in informed trading during the outage periods. Lastly, we use trading volume changes during outages to construct a firm-level measure …

Human-Animal Interaction And Human Prosociality: A Meta-Analytic Review Of Experimental And Correlational Studies, Nicole Ruiying Chen, Nadyanna M. Majeed, Gloria J. Lai, Paye Shin Koh, Manmeet Kaur, K. T. A Sandeeshwara Kasturiratna, Zhi Yan Alycia Ho, Jose C. Yong, Andree Hartanto

Research Collection School of Social Sciences

Pet ownership and interactions with animals confer various physiological and psychological benefits to humans. Although interactions with animals are commonplace, there is no consensus in the literature on the actual impact of animal exposure on prosociality. Hence, this meta-analysis investigated 20 eligible studies (n = 4,116, k = 48) and provided an extensive examination into the different potential moderators of the relationship between human–animal interaction (HAI) and prosociality, such as the distinction between empathy and prosocial behavior, HAI characteristics, and sample characteristics. Overall, a small positive effect size was found (d = 0.22), suggesting that human exposure to animals is …

Esg Performance And Debt Financing Cost, Bo Shi

Dissertations and Theses Collection (Open Access)

Using the Latent Dirichlet Allocation thematic model, I calculate the comprehensiveness score of corporate ESG report and examine how the score correlates with corporate debt financing cost. Based on the empirical analysis over a sample of Chinese listed A-share firms with available ESG reports. I find that more comprehensive ESG report reduces corporate debt financing cost. Specifically, an increase by one standard deviation in ESG report comprehensiveness can decrease corporate debt financing cost by 3.88%. In heterogenous analysis, I find that the effect of ESG input on reducing corporate debt cost is stronger for state-owned firms. Good financial performance of …

Combinatorial Creativity: Knowledge Graphs And Idea Generation In Crowdsourcing Innovation, Zhi Wei Vincent Mack

Dissertations and Theses Collection (Open Access)

This dissertation explores the dynamic interplay between combinatorial creativity and technology-driven innovation within various knowledge-intensive fields. It critically examines the role of combinatorial creativity in generating groundbreaking innovations by amalgamating existing ideas and technologies. This research incorporates a detailed examination of how knowledge, whether tacit or explicit, can be transformed into actionable data to foster innovation in crowdsourcing contexts. Chapter 2 provides an overview of the relevant literature on how Artificial Intelligence and Knowledge Management Systems can support combinatorial creativity. The study further delves into the transformative impact of knowledge management systems, particularly focusing on crowdsourcing platforms that leverage collective …