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Articles 2431 - 2460 of 8706
Full-Text Articles in Entire DC Network
From Continuity To Editability: Inverting Gans With Consecutive Images, Yangyang Xu, Yong Du, Wenpeng Xiao, Xuemiao Xu, Shengfeng He
From Continuity To Editability: Inverting Gans With Consecutive Images, Yangyang Xu, Yong Du, Wenpeng Xiao, Xuemiao Xu, Shengfeng He
Research Collection School Of Computing and Information Systems
Existing GAN inversion methods are stuck in a paradox that the inverted codes can either achieve high-fidelity reconstruction, or retain the editing capability. Having only one of them clearly cannot realize real image editing. In this paper, we resolve this paradox by introducing consecutive images (e.g., video frames or the same person with different poses) into the inversion process. The rationale behind our solution is that the continuity of consecutive images leads to inherent editable directions. This inborn property is used for two unique purposes: 1) regularizing the joint inversion process, such that each of the inverted codes is semantically …
Differentiated Learning For Multi-Modal Domain Adaptation, Jianming Lv, Kaijie Liu, Shengfeng He
Differentiated Learning For Multi-Modal Domain Adaptation, Jianming Lv, Kaijie Liu, Shengfeng He
Research Collection School Of Computing and Information Systems
Directly deploying a trained multi-modal classifier to a new environment usually leads to poor performance due to the well-known domain shift problem. Existing multi-modal domain adaptation methods treated each modality equally and optimize the sub-models of different modalities synchronously. However, as observed in this paper, the degrees of domain shift in different modalities are usually diverse. We propose a novel Differentiated Learning framework to make use of the diversity between multiple modalities for more effective domain adaptation. Specifically, we model the classifiers of different modalities as a group of teacher/student sub-models, and a novel Prototype based Reliability Measurement is presented …
Resource Capacity Requirement For Multi-Terminal Cooperation In Container Ports, Byung Kwon Lee, Mei Wan Low
Resource Capacity Requirement For Multi-Terminal Cooperation In Container Ports, Byung Kwon Lee, Mei Wan Low
Research Collection Lee Kong Chian School Of Business
Capacity sharing among neighboring terminals offer a means to meet increasing or unexpected demand for cargo-handling without additional capital investment. This study proposes a model for capacity requirement planning of major resources, such as quay cranes (QCs), storage space, and gate, in multiterminal port operations where demand is time dependent. A resource profile simulation is run to generate random events across the terminals and estimate the capacity requirement in the form of workload distributions on port resources over time-shifts. The effects on workload requirement, arising from multiterminal cooperation, are subsequently evaluated in consideration of different container flows among terminals. Experimental …
Tracking Retail Investor Activity, Ekkehart Boehmer, Charles M. Jones, Xiaoyan Zhang, Xinran Zhang
Tracking Retail Investor Activity, Ekkehart Boehmer, Charles M. Jones, Xiaoyan Zhang, Xinran Zhang
Research Collection Lee Kong Chian School Of Business
We provide an easy method to identify marketable retail purchases and sales using recent, publicly available U.S. equity transactions data. Individual stocks with net buying by retail investors outperform stocks with negative imbalances by approximately 10 bps over the following week. Less than half of the predictive power of marketable retail order imbalance is attributable to order flow persistence, while the rest cannot be explained by contrarian trading (proxy for liquidity provision) or public news sentiment. There is suggestive, but only suggestive, evidence that retail marketable orders might contain firm-level information that is not yet incorporated into prices.
Resource Allocation With Sigmoidal Demands: Mobile Healthcare Units And Service Adoption, Andres Alban, Philippe Blaettchen, Harwin De Vries, Luk Van Wassenhove
Resource Allocation With Sigmoidal Demands: Mobile Healthcare Units And Service Adoption, Andres Alban, Philippe Blaettchen, Harwin De Vries, Luk Van Wassenhove
Research Collection Lee Kong Chian School Of Business
Problem definition: Achieving broad access to health services (a target within the sustainable development goals) requires reaching rural populations. Mobile healthcare units (MHUs) visit remote sites to offer health services to these populations. However, limited exposure, health literacy, and trust can lead to sigmoidal (S-shaped) adoption dynamics, presenting a difficult obstacle in allocating limited MHU resources. It is tempting to allocate resources in line with current demand, as seen in practice. However, to maximize access in the long term, this may be far from optimal, and insights into allocation decisions are limited. Academic/practical relevance: We present a formal model of …
How ‘Human’ Should Robots Be?, Singapore Management University
How ‘Human’ Should Robots Be?, Singapore Management University
Perspectives@SMU
Hotel guests like interaction with devices that look and sound like them, but they can spark displeasure after service failures, new CUHK study shows
Declining Discount Rates In Singapore's Market For Privately Developed Apartments, Eric Fesselmeyer, Haoming Liu, Alberto Salvo
Declining Discount Rates In Singapore's Market For Privately Developed Apartments, Eric Fesselmeyer, Haoming Liu, Alberto Salvo
Research Collection College of Integrative Studies
Singapore's market for new privately developed apartments exhibits wide quasi-experimental variation in ownership tenure. We develop an empirical model in which prices are decomposed into the utility of housing services and a factor that shifts with asset tenure and the discount rate schedule, which we discipline to vary smoothly over time. We estimate discount rates that decline over time and, to accommodate the observed price differences, fall to 0.5-1.5% p.a. by year 400. The finding that households making sizable transactions do not entirely discount benefits accruing centuries from today is relevant, with the appropriate risk adjustment, for evaluating climate-change investments.
Singapore In The Global Value Chains, Pao-Li Chang, Tran Bao Phuong Nguyen
Singapore In The Global Value Chains, Pao-Li Chang, Tran Bao Phuong Nguyen
Research Collection School Of Economics
This chapter analyses the participation of Singapore in the global value chains (GVC): how much of its gross exports are GVC-related trade; how downstream it is; and which countries are its key upstream and downstream trade partners. The analysis is carried out both at the country aggregate level and at the sector level. New formulas are proposed in the gross export decomposition framework of Koopman, Wang and Wei (2014) and Borin and Mancini (2017), to characterise a country/industry’s downstreamness in the GVC and the importance of each trade partner in its backward/forward linkages. Singapore started off with a very high …
Orthogonal Inductive Matrix Completion, Antoine Ledent, Rrodrigo Alves, Marius Kloft
Orthogonal Inductive Matrix Completion, Antoine Ledent, Rrodrigo Alves, Marius Kloft
Research Collection School Of Computing and Information Systems
We propose orthogonal inductive matrix completion (OMIC), an interpretable approach to matrix completion based on a sum of multiple orthonormal side information terms, together with nuclear-norm regularization. The approach allows us to inject prior knowledge about the singular vectors of the ground-truth matrix. We optimize the approach by a provably converging algorithm, which optimizes all components of the model simultaneously. We study the generalization capabilities of our method in both the distribution-free setting and in the case where the sampling distribution admits uniform marginals, yielding learning guarantees that improve with the quality of the injected knowledge in both cases. As …
Unified And Incremental Simrank: Index-Free Approximation With Scheduled Principle, Fanwei Zhu, Yuan Fang, Kai Zhang, Kevin C.-C. Chang, Hongtai Cao, Zhen Jiang, Minghui Wu
Unified And Incremental Simrank: Index-Free Approximation With Scheduled Principle, Fanwei Zhu, Yuan Fang, Kai Zhang, Kevin C.-C. Chang, Hongtai Cao, Zhen Jiang, Minghui Wu
Research Collection School Of Computing and Information Systems
SimRank is a popular link-based similarity measure on graphs. It enables a variety of applications with different modes of querying (e.g., single-pair, single-source and all-pair modes). In this paper, we propose UISim, a unified and incremental framework for all SimRank modes based on a scheduled approximation principle. UISim processes queries with incremental and prioritized exploration of the entire computation space, and thus allows flexible tradeoff of time and accuracy. On the other hand, it creates and shares common “building blocks” for online computation without relying on indexes, and thus is efficient to handle both static and dynamic graphs. Our experiments …
Which Variables Should I Log?, Zhongxin Liu, Xin Xia, David Lo, Zhenchang Xing, Ahmed E. Hassan, Shanping Li
Which Variables Should I Log?, Zhongxin Liu, Xin Xia, David Lo, Zhenchang Xing, Ahmed E. Hassan, Shanping Li
Research Collection School Of Computing and Information Systems
Developers usually depend on inserting logging statements into the source code to collect system runtime information. Such logged information is valuable for software maintenance. A logging statement usually prints one or more variables to record vital system status. However, due to the lack of rigorous logging guidance and the requirement of domain-specific knowledge, it is not easy for developers to make proper decisions about which variables to log. To address this need, in this work, we propose an approach to recommend logging variables for developers during development by learning from existing logging statements. Different from other prediction tasks in software …
Towards Cnl-Based Verbalization Of Computational Contracts, Inari Listenmaa, Maryam Hanafiah, Regina Cheong, Andreas Kallberg
Towards Cnl-Based Verbalization Of Computational Contracts, Inari Listenmaa, Maryam Hanafiah, Regina Cheong, Andreas Kallberg
Centre for Computational Law (2022-2025)
We present a CNL, which is a component of L4, a domain-specific programming language for drafting laws and contracts. Along with formal verification, L4’s core functionalities include natural language generation. We present the NLG pipeline and an interactive process for ambiguity resolution.
Singapore: National Report For The Global Access To Justice Project, Tan K. B. Eugene
Singapore: National Report For The Global Access To Justice Project, Tan K. B. Eugene
Research Collection Yong Pung How School Of Law
Global Access to Justice Project is gathering the very latest information on the impact of the world’s major justice systems, analyzing legal, economic, social, cultural and psychological barriers that prevent or inhibit many, and not only the poor, from entering and using the legal system. The country report for Singapore follows the common framework provided by the Global Access to Justice Project Questionnaire.
Does Bert Understand Idioms? A Probing-Based Empirical Study Of Bert Encodings Of Idioms, Minghuan Tan, Jing Jiang
Does Bert Understand Idioms? A Probing-Based Empirical Study Of Bert Encodings Of Idioms, Minghuan Tan, Jing Jiang
Research Collection School Of Computing and Information Systems
Understanding idioms is important in NLP. In this paper, we study to what extent pre-trained BERT model can encode the meaning of a potentially idiomatic expression (PIE) in a certain context. We make use of a few existing datasets and perform two probing tasks: PIE usage classification and idiom paraphrase identification. Our experiment results suggest that BERT indeed can separate the literal and idiomatic usages of a PIE with high accuracy. It is also able to encode the idiomatic meaning of a PIE to some extent.
Semi-Supervised Semantic Visualization For Networked Documents, Delvin Ce Zhang, Hady W. Lauw
Semi-Supervised Semantic Visualization For Networked Documents, Delvin Ce Zhang, Hady W. Lauw
Research Collection School Of Computing and Information Systems
Semantic interpretability and visual expressivity are important objectives in exploratory analysis of text. On the one hand, while some documents may have explicit categories, we could develop a better understanding of a corpus by studying its finer-grained structures, which may be latent. By inferring latent topics and discovering keywords associated with each topic, one obtains a semantic interpretation of the corpus. One the other hand, by visualizing documents, latent topics, and category labels on the same plot, one gains a bird’s eye view of the relationships among documents, topics, and various categories. Semantic visualization is a class of methods that …
Estimating The Associations Between Big Five Personality Traits, Testosterone, And Cortisol, Zachary Sundin, Lester Sim
Estimating The Associations Between Big Five Personality Traits, Testosterone, And Cortisol, Zachary Sundin, Lester Sim
Research Collection School of Social Sciences
Objective: Hormones are often conceptualized as biological markers of individual differences and have been associated with a variety of behavioral indicators and characteristics, such as mating behavior or acquiring and maintaining dominance. However, before researchers create strong theoretical models for how hormones modulate individual and social behavior, information on how hormones are associated with dominant models of personality is needed. Although there have been some studies attempting to quantify the associations between personality traits, testosterone, and cortisol, there are many inconsistencies across these studies. Methods: In this registered report, we examined associations between testosterone, cortisol, and Big Five personality traits. …
Cultural Adaptation Congruence In Immigrant Spouses Is Associated With Marital Quality, Lester Sim, Shanting Chen, Minyu Zhang, Robin S. Edelstein, Su Yeong Kim
Cultural Adaptation Congruence In Immigrant Spouses Is Associated With Marital Quality, Lester Sim, Shanting Chen, Minyu Zhang, Robin S. Edelstein, Su Yeong Kim
Research Collection School of Social Sciences
Objective and background: Previous research suggests that cultural adaptation is associated with Mexican-origin couples' marital outcomes, including marital distress and rates of dissolution. However, research on the marital implications of different types of spousal differences in cultural adaptation often omits important dyadic dynamics (i.e., incongruence between couples and with their partners); this, coupled with existing methodological issues, might contribute to the pattern of mixed findings in the literature. Method: Using data from 273 Mexican-origin couples, we conducted response surface analyses to examine how spousal congruence in four adaptation domains (acculturation, enculturation, English proficiency, Spanish proficiency) is associated with wives' and …
When Running For Office Runs In The Family: Horizontal Dynasties, Policy And Development In The Philippines, Dean C. Dulay, Laurence Go
When Running For Office Runs In The Family: Horizontal Dynasties, Policy And Development In The Philippines, Dean C. Dulay, Laurence Go
Research Collection School of Social Sciences
Political dynasties exist in practically every variant of democracy, but take different forms in different places. Yet the types of dynastic structures have remained unexplored. We argue that horizontal dynasties—multiple members from the same political family holding different political offices concurrently— affect policymaking by replacing potential political rivals, who may oppose an incumbent’s policy choices, with a member of the family. But in developing countries, the policy change that accrues from dynastic status may not lead to higher levels of economic development. We test this argument’s implications in the Philippines. Employing a close elections regression discontinuity design on a sample …
Urban Governance And Electricity Losses: An Exploration Of Spatial Unevenness In Karachi, Pakistan, Ijlal Naqvi, Ate Poorthuis, Anirudh Govind
Urban Governance And Electricity Losses: An Exploration Of Spatial Unevenness In Karachi, Pakistan, Ijlal Naqvi, Ate Poorthuis, Anirudh Govind
Research Collection School of Social Sciences
The inadequate supply of electricity in Pakistan disrupts everyday life and hampers industry and business; in this it is an emblematic indicator of the poor quality of urban governance pervasive in much of the Global South. We focus on the governance of Karachi’s electricity distribution system, and its spatial unevenness across this sprawling metropolis of 15 million residents which encompasses huge informal settlements alongside upscale housing and commercial plazas. Using a dataset with granular, neighborhood-level electricity data, we apply spatial and statistical modeling techniques to understand how transmission and distribution losses, i.e., the utility’s ability to bill for the electricity …
Common Executive Function Predicts Reappraisal Ability But Not Frequency, Wei Xing Toh, Hwajin Yang
Common Executive Function Predicts Reappraisal Ability But Not Frequency, Wei Xing Toh, Hwajin Yang
Research Collection School of Social Sciences
Cognitive reappraisal is an emotion-regulation strategy that positively impacts various facets of adaptive functioning (e.g., interpersonal relations, subjective well-being). Although reappraisal implicates cognitive processing, no clear consensus has been reached regarding its cognitive correlates. Therefore, we examined how executive function (EF)-i. e., a group of general-purpose control abilities comprising working memory, inhibition, and shifting-would be associated with task-based reappraisal ability and self-reported reappraisal frequency. Using a latent-variable approach, we found that the shared variance among EF facets (i.e., common EF)-a general goal-management ability that facilitates the activation and maintenance of task-relevant goals-was positively related to reappraisal ability but not reappraisal …
Habitual Entrepreneurship In Digital Platform Ecosystems: A Time-Contingent Model Of Learning From Prior Software Project Experiences, Terence Fan, Andreas Schwab, Xuesong Geng
Habitual Entrepreneurship In Digital Platform Ecosystems: A Time-Contingent Model Of Learning From Prior Software Project Experiences, Terence Fan, Andreas Schwab, Xuesong Geng
Research Collection Lee Kong Chian School Of Business
The emergence of large-scale digital platforms such as Facebook, Google Play and Apple App Store around 2008 has created opportunities for independent entrepreneurs to offer their self-developed software applications (“apps”) to large groups of platform users. The development and release of tens of thousands of apps by thousands of independent developers has created dynamic entrepreneurial ecosystems. This paper investigates whether and how learning by independent habitual entrepreneurs unfolds in substantively different ways in such dynamic platform-based environments. We argue that in these entrepreneurial ecosystems, the timing of learning efforts becomes essential. For Facebook app developers, we find that learning from …
Inventory Sharing And Demand-Side Underweighting, Hui Zhao, Liang Xu, Enno Siemsen
Inventory Sharing And Demand-Side Underweighting, Hui Zhao, Liang Xu, Enno Siemsen
Research Collection Lee Kong Chian School Of Business
Problem definition: Transshipment/inventory sharing has been used in practice because of its risk-pooling potential. However, human decision makers play a critical role in making inventory decisions in an inventory sharing system, which may affect its benefits. We investigate whether the opportunity to transship inventory influences decision makers' inventory decisions and whether, as a result, the intended risk-pooling benefits materialize. Academic/practical relevance: Previous research in transshipment, which is focused on finding optimal stocking and sharing decisions, assumes rational decision making without any systematic bias. As one of the first to study inventory sharing from a behavioral perspective, we demonstrate a persistent …
Routing Policy Choice Prediction In A Stochastic Network: Recursive Model And Solution Algorithm, Tien Mai, Xinlian Yu, Song Gao, Emma Frejinger
Routing Policy Choice Prediction In A Stochastic Network: Recursive Model And Solution Algorithm, Tien Mai, Xinlian Yu, Song Gao, Emma Frejinger
Research Collection School Of Computing and Information Systems
We propose a Recursive Logit (STD-RL) model for routing policy choice in a stochastic time-dependent (STD) network, where a routing policy is a mapping from states to actions on which link to take next, and a state is defined by node, time and information. A routing policy encapsulates travelers’ adaptation to revealed traffic conditions when making route choices. The STD-RL model circumvents choice set generation, a procedure with known issues related to estimation and prediction. In a given state, travelers make their link choice maximizing the sum of the utility of the outgoing link and the expected maximum utility until …
Achieving Price Stability, Hwee Kwan Chow, Taojun Xie
Achieving Price Stability, Hwee Kwan Chow, Taojun Xie
Research Collection School Of Economics
The aim of delivering medium-term price stability is the stated objective of the Monetary Authority of Singapore. To this end, the central bank adopted an unusual exchange rate–based monetary policy framework that has served the economy well over the past decades. However, the shift from the phase of catch-up growth to a mature economy raises the question of whether the current monetary policy framework needs reformulation. Moreover, as global financial integration deepens, surges in cross-border capital flows impact Singapore’s exchange rate and asset prices, which has implications for economic dynamism and inclusion. Since a large and persistent deviation of the …
Rationalizable Implementation In Finite Mechanisms, Y-C Chen, Takashi Kunimoto, Y Sun, S. Xiong
Rationalizable Implementation In Finite Mechanisms, Y-C Chen, Takashi Kunimoto, Y Sun, S. Xiong
Research Collection School Of Economics
We prove that the Maskin monotonicity condition (proposed by Bergemann et al. (2011)) fully characterizes exact rationalizable implementation in an environment with lotteries and transfers. Different from previous papers, our approach possesses many appealing features simultaneously, e.g., finite mechanisms with no integer game or modulo game are used; no transfers are made in any rationalizable profile; the message space is small; the implementation is robust to information perturbations in the sense of Oury and Tercieux (2012).
Equal-Quantile Rules In Resource Allocation With Uncertain Needs, Yan Long, Jay Sethuraman, Jingyi Xue
Equal-Quantile Rules In Resource Allocation With Uncertain Needs, Yan Long, Jay Sethuraman, Jingyi Xue
Research Collection School Of Economics
A group of agents have uncertain needs on a resource, which must be allocated before uncertainty re-solves. We propose a parametric class of division rules we call equal-quantile rules. The parameter lambda of an equal-quantile rule is the maximal probability of satiation imposed on agents - for each agent, the prob-ability that his assignment is no less than his realized need is at most lambda. It determines the extent to which the resource should be used to satiate agents. If the resource is no more than the sum of the agents' lambda-quantile assignments, it is fully allocated and the rule …
Choice Of Law For Formation Of Contracts: Solomon Lew V Kaikhushru Shiavax Nargolwala, Adeline Chong
Choice Of Law For Formation Of Contracts: Solomon Lew V Kaikhushru Shiavax Nargolwala, Adeline Chong
Research Collection Yong Pung How School Of Law
No abstract provided.
Proper Characterisation Of The Parol Evidence Rule And Its Applicability In International Arbitration, Darius Chan, Yi Hang Louis Lau
Proper Characterisation Of The Parol Evidence Rule And Its Applicability In International Arbitration, Darius Chan, Yi Hang Louis Lau
Research Collection Yong Pung How School Of Law
Most arbitral statutes and institutional rules give great latitude to tribunals on the admissibility of evidence, and do not mandate application of domestic rules of evidence. In common law jurisdictions where the parol evidence rule applies, the issue that arises is whether the parol evidence rule is necessarily a procedural rule of evidence which tribunals are not bound to apply, especially in jurisdictions which have codified the rule under domestic evidence legislation. Notwithstanding any codification, this article argues that the parol evidence rule at common law is a substantive rule of contractual interpretation that should be applied as part of …
The Use Of Expert Opinion Evidence In Criminal Proceedings: An Updated Framework, Siyuan Chen, Zhi Jia Koh, Jian Wei Joel Soon
The Use Of Expert Opinion Evidence In Criminal Proceedings: An Updated Framework, Siyuan Chen, Zhi Jia Koh, Jian Wei Joel Soon
Research Collection Yong Pung How School Of Law
The 2012 amendments to the Evidence Act2 “significantly broadened the admissibility criteria for expert evidence”;3 at the same time, the judicial discretion to deny admissibility of relevant expert opinion evidence was also introduced. This article considers the key developments pre- and post-amendments, and in doing so provides an updated framework for prosecutors and defence counsel alike to admit and challenge expert opinion evidence in criminal proceedings. Since it complements earlier articles in this series on similar fact4 and hearsay evidence,5 readers are assumed to be broadly familiar with the features of the Evidence Act, such as its admissibility paradigm, the …
Finding A Rule-Based Solution To The Appellate Body Crisis: Looking Beyond The Multiparty Interim Appeal Arbitration Arrangement, Henry S. Gao
Research Collection Yong Pung How School Of Law
The WTO dispute settlement system is in crisis due to the persistent blockage of the appointment of Appellate Body members by the United States. This paper reviews the US criticisms against the Appellate Body and argues that its allegations are unfounded and its approach is wrong. To deal with the US blockage, various proposals have been made, with the most popular being the Multiparty Interim Appeal Arbitration Arrangement (MPIA) set up by several key Members including the European Union and China. After a thorough analysis of the key features of the MPIA from both theoretical and practical perspectives, this paper …