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7,389 results on '"Lewis, Mark"'

2. Index

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

3. Contributors

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

4. Back Cover

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

5. Boiling Frogs: Narratives of Coloniality in South African Art

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

6. Wolf Warrior II

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

7. Seeing and Being Seen

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

8. List of Figures

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

9. Acknowledgements

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

10. Understanding William Kentridge From China

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

11. Shifting Urbanity and Global China in Conversation: Views from Johannesburg and Lusaka

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

12. The Political Sublime

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

13. Traces of Chinese Trade Ceramics in Southern Africa

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

14. Diary of a Diasporic Chinese Artist\Rin South Africa

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

16. Moffat Takadiwa

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

17. 2. Circulation

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

18. Hidden Objects at the Johannesburg Art Gallery: Han DynastyMíngqì

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

19. Tech Transfer

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

20. 3. Transgression

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

21. 1. Biography

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

22. The Chinese Camera Club of South Africa

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

23. Introduction: Geopolitics by Other Means

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

24. A Chinese Immigrant Collector and the Story of His Stamp Cover

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

25. A Letter to My Cousin in China

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

26. Title Page, Copyright, Dedication

Author

Zhang, Lifang, Yang, Yan, Wang, Shuo, Rodrigues, Gemma, NG-Yang, Kristin, Neustetter, Marcus, Mwaba, Stary, Moyo, Khangelani, Lewis, Mark, Kritzinger, Nicola, Huynh, T Tu, Hu, Binjun, Hayes, Patricia, Harrison, Philip, Esmyol, Esther, Dittgen, Romain, Corrigall, Malcolm, Cheng, Ying, Assubuji, Rui, Anthony, Ross, Simbao, Ruth, and Leeb-du Toit, Juliette

Published
2023

27. References

Author

Lewis, Mark and Zack, Tanya

Published
2022

28. Index

Author

Lewis, Mark and Zack, Tanya

Published
2022

29. 7. Bedroom

Author

Lewis, Mark and Zack, Tanya

Published
2022

31. 10. Undercity

Author

Lewis, Mark and Zack, Tanya

Published
2022

36. 3. Inside Out

Author

Lewis, Mark and Zack, Tanya

Published
2022

37. 4. Zola

Author

Lewis, Mark and Zack, Tanya

Published
2022

38. 1. S'kop

Author

Lewis, Mark and Zack, Tanya

Published
2022

41. Cover

Author

Lewis, Mark and Zack, Tanya

Published
2022

43. Deep Learning for Disease Outbreak Prediction: A Robust Early Warning Signal for Transcritical Bifurcations

Author

Miry, Reza, Chakraborty, Amit K., Greiner, Russell, Lewis, Mark A., Wang, Hao, Guan, Tianyu, and Ramazi, Pouria

Subjects
Computer Science - Machine Learning, Computer Science - Artificial Intelligence
Abstract

Early Warning Signals (EWSs) are vital for implementing preventive measures before a disease turns into a pandemic. While new diseases exhibit unique behaviors, they often share fundamental characteristics from a dynamical systems perspective. Moreover, measurements during disease outbreaks are often corrupted by different noise sources, posing challenges for Time Series Classification (TSC) tasks. In this study, we address the problem of having a robust EWS for disease outbreak prediction using a best-performing deep learning model in the domain of TSC. We employed two simulated datasets to train the model: one representing generated dynamical systems with randomly selected polynomial terms to model new disease behaviors, and another simulating noise-induced disease dynamics to account for noisy measurements. The model's performance was analyzed using both simulated data from different disease models and real-world data, including influenza and COVID-19. Results demonstrate that the proposed model outperforms previous models, effectively providing EWSs of impending outbreaks across various scenarios. This study bridges advancements in deep learning with the ability to provide robust early warning signals in noisy environments, making it highly applicable to real-world crises involving emerging disease outbreaks., Comment: 14 pages, 1 figure, 5 tables

Published
2025

44. Mountain pine beetle struggles with jack pine: A mechanistic explanation for slowed range expansion in Alberta

Author

Johnson, Evan C., Musso, Antonia, Cullingham, Catherine, and Lewis, Mark A.

Subjects
Quantitative Biology - Populations and Evolution
Abstract

Following widespread outbreaks across western North America, mountain pine beetle recently expanded its range from British Columbia into Alberta. However, mountain pine beetle's eastward expansion across Canada has stalled unexpectedly, defying predictions of rapid spread through jack pine, a novel host tree. This study investigates the underlying causes of this deceleration using an integrative approach combining statistical modeling, simulations, and experimental data. We find that the slow spread is primarily due to mountain pine beetle's difficulty in finding and successfully attacking jack pine trees, rather than issues with reproduction or larval development. The underlying mechanism impeding beetle range expansion has been hypothesized to be lower pine volumes in eastern forests, which are primarily a consequence of lower stem density. However, our analysis suggests that jack pine's phenotype itself is the primary impediment. We propose that jack pine's smaller size, thinner phloem, and lower monoterpene concentrations result in weaker chemical cues during the host-finding and mass-attack stages of MPB's life cycle, ultimately leading to fewer successful attacks. These findings suggest a reduced risk of further eastward spread, but should be interpreted cautiously due to enormous policy implications and the inherent limitations of ecological forecasting.

Published
2024

45. On non self-normalizing subgroups

Author

Bianchi, Mariagrazia, Camina, Rachel D., Lewis, Mark L., Pacifici, Emanuele, and Sanus, Lucia

Subjects
Mathematics - Group Theory
Abstract

Let $n$ be a non negative integer, and define $D_n$ to be the family of all finite groups having precisely $n$ conjugacy classes of nontrivial subgroups that are not self-normalizing. We are interested in studying the behavior of $D_n$ and its interplay with solvability and nilpotency. We first show that if $G$ belongs to $D_n$ with $n \le 3$, then $G$ is solvable of derived length at most 2. We also show that $A_5$ is the unique nonsolvable group in $D_4$, and that $SL_2(3)$ is the unique solvable group in $D_4$ whose derived length is larger than 2. For a group $G$, we define $D(G)$ to be the number of conjugacy classes of nontrivial subgroups that are not self-normalizing. We determine the relationship between $D(H \times K)$ and $D(H)$ and $D(K)$. We show that if $G$ is nilpotent and lies in $D_n$, then $G$ has nilpotency class at most $n/2$ and its derived length is at most $\log_2 (n/2) + 1$. We consider $D_n$ for several classes of Frobenius groups, and we use this classification to classify the groups in $D_0$, $D_1$, $D_2$, and $D_3$. Finally, we show that if $G$ is solvable and lies in $D_n$ with $n \ge 3$, then $G$ has derived length at most the minimum of $n-1$ and $3 \log_2 (n+1) + 9$.

Published
2024

46. Groups with a Fixed Character Degree

Author

Lewis, Mark L. and Martin, Brandon

Subjects
Mathematics - Group Theory, 20C15
Abstract

Let $G$ be a finite group, and let $d$ be the degree of an irreducible character of $G$ such that $|G|=d(d+e)$ for some $e>1$. Consider the case when $G$ is solvable, $d$ is square-free, and $(d,d+e)=1$. We wish to explore an equivalent condition on $G$ when $d\in\text{cd}(G)$. We show that if $d\in\text{cd}(G)$ then there is a sequence of congruences relating the prime power factors of $d+e$ to the product of prime factors of $d$ such that the product of the moduli in this sequence of congruences is $d$. Moreover, the argument will hold in both directions.

Published
2024

47. Identifiability analysis of vaccination decision-making dynamics

Author

Aghaeeyan, Azadeh, Lewis, Mark A., and Ramazi, Pouria

Subjects
Quantitative Biology - Quantitative Methods, Physics - Physics and Society, Quantitative Biology - Populations and Evolution
Abstract

Variations in individuals' perceptions of vaccination and decision-making processes can give rise to poor vaccination coverage. The future vaccination promotion programs will benefit from understanding this heterogeneity amongst groups within a population and, accordingly, tailoring the communication strategies. Motivated by this, we developed a mechanistic model consisting of a system of ordinary differential equations that categorizes individuals based on two factors: (i) perceived payoff gains for vaccination and (ii} decision-making strategies where we assumed that individuals may behave as either myopic rationalists, going for a dose of vaccine if doing so maximizes their perceived payoff gain, or success-based learners, waiting to observe feedback on vaccination before deciding. We then investigated the global identifiability of group proportions and perceived payoff gains, that is, the possibility of globally retrieving these parameters by observing the error-free cumulative proportion of vaccinated individuals over time. To do so, for each group, we assumed a piecewise constant payoff gain and, for each time interval, obtained the so-called generalized input-output equation. We then proved the global identifiability of these parameters under certain conditions. Global identifiability opens the door to reliable estimations of the group proportions and their perceived payoffs.

Published
2024

49. GVZ-groups, Flat groups, and CM-Groups

Author

Burkett, Shawn T. and Lewis, Mark L.

Subjects
Mathematics, QA1-939
Abstract

We show that a group is a GVZ-group if and only if it is a flat group. We show that the nilpotence class of a GVZ-group is bounded by the number of distinct degrees of irreducible characters. We also show that certain CM-groups can be characterized as GVZ-groups whose irreducible character values lie in the prime field.

Published
2021
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50. The Maximum Length for Ducci Sequences on $\mathbb{}Z_m^n$ when $n$ is Even

Author

Lewis, Mark L. and Tefft, Shannon M.

Subjects
Mathematics - Number Theory, Mathematics - Group Theory, 20D60, 11B83, 11B50
Abstract

Let $D: \mathbb{Z}_m^n \to \mathbb{Z}_m^n$ be defined so \[D(x_1, x_2, ..., x_n)=(x_1+x_2 \; \text{mod} \; m, x_2+x_3 \; \text{mod} \; m, ..., x_n+x_1 \; \text{mod} \; m).\] $D$ is known as the Ducci function and for $\mathbf{u} \in \mathbb{Z}_m^n$, $\{D^{\alpha}(\mathbf{u})\}_{\alpha=0}^{\infty}$ is the Ducci sequence of $\mathbf{u}$. Every Ducci sequence enters a cycle because $\mathbb{Z}_m^n$ is finite. In this paper, we aim to establish an upper bound for how long it will take for a Ducci sequence in $\mathbb{Z}_m^n$ to enter its cycle when $n$ is even.

Published
2024

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